FAQs & Troubleshooting

1. Selected Icons: Press and hold an icon and enter the selected state to drag it.
2. Add a new desktop: Drag an icon to a blank desktop to add a new desktop; on the contrary, drag all the icons on a desktop to other desktops, this desktop will become a blank desktop, and then it will be deleted automatically.
3. Long press an application icon until it is selected, drag it to another application icon, a folder will be created automatically, click the folder - click the file name - enter the file name editing status, you can change the folder name.
4.Long press the blank space on the desktop and select the Organize icon at the bottom.You can drag other icons to the selection box at the bottom.Then select the desktop where you want to place it and drag the icons in the selection box to the target location.

1. The first step of the boot wizard is to select the language when the new device is turned on for the first time (if you have used the device to switch the language, you can restore the factory settings and set the same steps with the new device)
2. Go to Settings - System - Language and Input Methods - Language - Add Language - Select the desired language to add, and then press and hold the desired language name in the list of added languages and drag it to the first line to complete the switching of the system language (this setting can't change the language inside the self-installed third-party APP, and it needs to be set in the language in the booting wizard to take effect).

The device system may have crashed for some unknown reason, please try the following:
1. long press the power button for 10 seconds for software recovery.
2. If it is a tablet, you can recover it through the reset button, the location of the reset button is usually next to the power button or a small hole in the same location on the opposite side bezel, poke it with a card removal pin.
3.If all the above operations can not be recovered, download the device firmware and brush tool, and upgrade the firmware through the computer wired connection.

The system can not be upgraded can be divided into the following cases of troubleshooting:
1. System update can not detect the new version, please confirm that the phone network connection is normal, if you click on the system update prompt has been the latest version, then generally no need to update, if the version date is too old and can not detect the update, you can provide the phone's IMEI, SN, version number by e-mail to customer service to verify the solution.
2. If the system update can detect the new version, but the download fails, please check the network reason, usually the cell phone network signal is not good or network congestion caused by the download failure, it is recommended to change the time or network to re-download.
3. The new version of the system was downloaded successfully, but after restarting the phone did not enter the upgrade installation interface or installation failed.
① may be the network instability caused by the download of the system program error, need to change the time or network to re-download;
② If the phone is inserted into the TF card, may lead to file reading errors, please remove the TF card to download the system again;
③After excluding the above factors, long press Settings-Application Information-Storage and Cache-Clear the storage space and cache, and then re-download.

Dear users, Hello! All of our products factory adapted version of the Android system is the best software version of the device, is to protect the user experience of the optimal configuration, we do not recommend that you only for the pursuit of high versions of Android and update; upgrade from Android 13 to Android 14 in addition to the need for equipment hardware configuration support, but also need to R & D departments have the appropriate version of the development plan, and debugging! Adaptation software to the best state, at present, we have not received any notification about the higher version of Android system upgrade plan for this model, if you can upgrade, we will push the new version update online in time, please pay attention to the cell phone system update information push, thank you for using Doug's products!

The possible reasons for the device running slow are as follows:
1. too many programs running in the background resulting in too little remaining capacity of the device RAM, there is not enough remaining space to run new programs (Android devices that have been used for many days and have not been turned off will also take up too much RAM space);
2. too much data occupies ROM memory, there is not enough capacity for the system to run smoothly;
3. the user installed a third-party theme software or other rogue software (will automatically run to take up space, and the user can not see), a large number of system resources, resulting in slow system operation;
4. when the power is low when entering the power saving mode, the system will reduce the brightness and operating efficiency, will also feel slow running;
5. the external SD card rate standard is low or the SD card is damaged, resulting in reading the SD card file is very slow, or can not read (has been reading), sometimes also affect the efficiency of the entire system.
We suggest you do the following troubleshooting operations:
1、Check whether the device has installed a third-party theme or other large-scale software;
2、Remove the SD card after turning off the device, then reboot the device (don't select the reboot option) and completely close all the programs running in the background;
3、After rebooting, please check whether the remaining capacity of the device ROM is sufficient (it is recommended to keep at least 1GB or more), and regularly use the system settings to clean up the system cache data and junk files;
4、 ROM capacity is sufficient or running slow, please try to restore the device to factory settings;
5、If the operation efficiency does not improve after restoring the factory settings, please return the device to the after-sales service.

1. The device has not been turned off for a long time, too many programs running in the background, resulting in the exhaustion of system resources or other abnormalities, which may lead to reboot phenomenon. We recommend that you close applications that are not used frequently, regularly use the system settings to clean up the system cache data and junk files, and manually restart the device to see if it still restarts abnormally after a period of time.
2. When the device temperature is too high, it may activate the phone protection function to reboot automatically, it is recommended that you do not use it while charging, or leave it in a hot environment.

1. Please try to restart the device to try.
2. The device has not been turned off for a long time, running too many programs in the background caused by the exhaustion of system resources or other abnormalities, may lead to system crash. We recommend that you close the applications that are not frequently used in your daily life, clean up the system cache data and junk files regularly using the system settings and restart the device manually, and observe whether the system still crashes after a period of time.
3. When the temperature of the device is too high, it may lead to crash, we suggest you do not use it while charging, or put it in a high temperature environment.
4. If you exclude the above factors, please download the device firmware and brush tool, through the computer wired connection for firmware upgrade, if still can not be solved, please find the after-sales service.

"Our device system has a setting to control the screen off time, please follow the steps below to set up:
1.Settings-Display-Screen timeout, from 15 seconds to 30 minutes, as well as "Never" multiple options, please select the settings as needed.
2. If you have installed a third-party device management software that can control the screen off time, please check whether you have set it yourself."

Please test several times, whether it prompts "Settings stop responding" every time you open the "Settings" function or set a certain option or with high probability, if yes, the system may have lost the Google key and need to rewrite it; if it only occurs occasionally, it may be If there is an error in the related program, please try to clear the cache of "Settings" APP (long press Settings APP-App Info (with circle i)-Storage and Cache-Clear Cache), or restore factory settings.

1. Firmware versions are generally updated once every 3 months at the latest.
2. Patch upgrades are typically updated once every 3 months or so.
3. platform versions will generally be upgraded once every 1 year or so.

Android is an open source system that allows users to independently select and restrict the permissions of applications. In order to better protect your personal information and data security, and to avoid leakage of personal privacy, we recommend that you set the sensitive permissions of each application carefully.
You can set various permissions of the apps in Permission Management of System Settings, and you can also authorize the apps according to the categories of permissions.

1. the device configuration physical running memory is 8GB, and in the software to expand the memory technology, you can set the maximum virtual memory 7GB, you can realize 15GB RAM size;
2. set the path: settings - memory expansion - open the switch, select 7GB, reboot can take effect.

1. update your browser to the latest version in the Google Play Store.
2. long press on browser - click on app info - storage and cache - clear cache.

Android Auto is Google's Android function designed for cars, the whole car has been certified by Google's Android Auto function, and the cell phone (tablet) with Android 10 or above system version certified by Google GMS can use Android Auto function after connecting with the car through USB cable or WIFI (the mobile phone can cast the screen to the car), but there may be differences in system parameters between different manufacturers and the car. The cell phone can be connected to the car through USB cable or WIFI to use Android Auto function (cell phone screen casting to the car), but there may be differences in the system parameters of cell phones (tablets) and car from different manufacturers, whether it can be connected to use, please refer to the actual match, Doogee cell phone (tablet) is a GMS-certified Android cell phone (tablet), but has not passed the test of the Android Auto function, and it is not sure whether it can be connected to use.

1. Please make sure the device has enough battery power first, the device will shut down automatically when the battery is low.
2. Please make sure if you touch the power button by mistake, press and hold the power button for more than 10 seconds, the device will automatically shut down and restart.
3. If your environment temperature is too low, the chemical activity of the battery will deteriorate, the battery may not be durable, and the device will automatically shut down after rapid power consumption.
4. Equipment temperature is too high will also lead to automatic shutdown, the equipment has overheating protection function, in the high load operation for some time, if the temperature of the motherboard is higher than the threshold will automatically shut down.
5. If all of the above reasons are excluded, or will frequently shut down automatically, you can restore the factory settings (backup data before restoration), if still can not be resolved, please download the device firmware and brushing tools, through the computer wired connection for firmware upgrade.
6.If the problem still exists, you need to overhaul the hardware.

1.The two apps you need to use in split screen are both on, i.e. there are corresponding programs running in the background;
2. Click the menu button on the navigation bar at the bottom of the screen to see all the programs running in the background, click the icon at the top of the view of one of the programs that need to be used in split-screen, select "Split Screen" in the pop-up option, and then select another application that needs to be used in split-screen;
3. The separator bar in the middle of the two apps can be dragged left and right (up and down when splitting the screen), and when you drag it to the most edge position, you can exit the split mode (you can also press the return button on the navigation bar to exit the split mode).

1. Please be careful that both parties to a call are not in the same room or too close together, at least 10 meters apart is recommended. When two devices are close together, the sound from the device can easily be picked up by the microphone of the other device and played back from your device, causing echoes or noise.
2. If you hear your own echo during a call, there is usually a problem with the other device.
3. If you hear an echo when talking to someone, try calling again from a different cell phone, or call from a landline to make sure there is no echo.
4. if the other party hears their own echo during the call, it may be an abnormality in the local mike that needs to be serviced.

1. Please check that the device call volume has been adjusted to the appropriate volume level.
2. Please turn on the speakerphone mode when you make a call to test whether the call sounded by the speaker is normal.
3. Call other contacts to test whether the other party's network and equipment problems. 4.If you still can't hear the other party even if you exclude the above factors, the earpiece may be malfunctioning and needs to be serviced.

I'm very sorry for the trouble, please try the following steps:
1. please check that the device call volume has been adjusted to the appropriate volume level.
2. Please test the device's recorder function and listen to the recorded audio file. If the recorded audio file plays with sound, the signal of one of the parties of the call may be too poor, please check the signal strength.
3.If the recorded audio file plays with no sound or murmurs, the microphone may be faulty and needs to be serviced.

1.Network problem: Please check if the network signal is poor, change the environment with better signal strength, restart the phone and try again.
2.Inbound end set up reject call or open anti-harassment function: please check dialpad-settings-harassment shielding, confirm whether this function is opened, whether the incoming call number is within the shielding range, please cancel the shielding of incoming calls and try again.

1. First check the network environment, the network environment is suddenly poor, the signal strength is suddenly weakened or interference is suddenly increased.
2.The network environment where the phone is located is overloaded, please try to change the call location.
3.The microphone may be blocked by fingers.
4. Volume down button is pressed accidentally during the call.
5. for other network problems, please try another location.

1. Please make calls in an environment with good signal.
2.Aiming your ear to the earpiece position during a call can effectively increase the call volume.
3. During the call, press the volume up and down keys to adjust the call volume.
4.Please try to make calls in an environment with little noise interference.

"1. If the current sound problem is intermittent and probable, it may be a network problem, please check if the cell phone signal is full.
If the call is intermittently interrupted in an area with weak signal or strong interference, it may be caused by a network problem, which is normal, please try to use it in a better signal environment.
2. Please use a standard wired headset or turn on the speakerphone to talk and see if there is any improvement. If there is any improvement, the microphone may be faulty and needs to be serviced.
3. If the earpiece makes a "squawking" sound when the volume is high, and if it is stable with the network, the possible causes are as follows:
Too large a volume will make people feel uncomfortable, please reduce the volume appropriately, due to some people's voices are fuller, the human ear is particularly sensitive to this part of the frequency, so when talking to some people, you may hear a slight "ZiZi" sound, for the more sensitive hearing of the user, this effect is more obvious.
4.For users who need to use their cell phones for long periods of time in high-capacity scenarios (e.g., noisy environments), it is recommended that you use an assistive device such as a headset to make calls."

It is recommended that you upgrade your system firmware to the latest version, add the nuisance call numbers to the blacklist (among the blocked numbers) in the nuisance blocking function, and turn on the block blacklist option in the call blocking rules.

1. It may be a local network problem: please check whether the problem occurs only in a certain area and whether other people around you have the same problem; if so, there may be a problem with the network itself in that area.
Check if the cell phone signal is weak, if the signal strength is only 1 frame or fluctuates greatly, please consult with the local operator to deal with the problem, and ask to check the network configuration to improve the signal strength of the network coverage.
2. Poor SIM card contact:
a.Please check whether your SIM card is a standard nano card, if the big card is cut off, it may lead to poor contact in the card slot, as well as no network, weak signal and other kinds of communication problems. You are strongly recommended to replace the standard nano card.
b. Please check whether the metal surface of your SIM card is oxidized and discolored, the oxidized copper piece may have poor contact and lead to unstable signal, please use alcohol to wipe the surface of the copper piece, or update the new SIM card.
3. Please check whether the device uses a metal protective cover. The continuous border of the metal cover may shield the signal, resulting in poor signal or even disconnection from the network, please try to remove the protective cover and then confirm the test results.

Dear user, Hello! All of our latest cell phones and SIM-capable tablets have vowifi turned on by default, so there is no need for users to set it manually. Due to the large number of different carriers in the world, it is impossible to match the carrier parameters one by one, if you encounter problems when using the vowifi function, please provide the name of your country and the name of the carrier, we will promptly feedback to the technical person in charge of dealing with you, thank you for choosing Doug's products, and wish you a happy life!

1.Troubleshoot whether the contact is set to be forwarded to voicemail.
2. If voicemail is set, please find the corresponding contact details screen inside Contacts, click Settings in the upper-right corner to cancel forwarding to voicemail.

1. Open "Messages" APP, click the three dots in the upper right corner, select "Junk Content and Blocked Conversations", see whether there is a verification code SMS is recognized as spam, you can add the number to the whitelist.
2. It may be due to network problems caused by the delay in receiving SMS (such as the peak period of SMS during holidays, or problems with the SMS server of the SMS sender itself), please wait patiently or re-send.
3. As the device SMS memory is full, resulting in the inability to receive new messages in a timely manner, you can delete part or all of the information that no longer need to be retained.
4. Please check whether there are sensitive words such as pornography or politics in the content of the SMS or the name of the sender, if there are, it may be blocked by the operator.
5. Equipment shutdown or not in the service area will also affect the timely receipt of SMS, general SMS will be retained in the system for 48 hours, within 48 hours of the boot or back to the place where there is a network signal, the system will automatically send the SMS again, if more than 48 hours the SMS can not be received again.
6. check whether the device is installed with third-party software to intercept nuisance SMS, you can confirm in the third-party application or SMS interface whether it is in the interception.

1. Make sure your mobile data network or Wi-Fi network is in good condition, if the network is not in good condition, the web page will be refreshed slowly, resulting in the phenomenon of jamming.
2. Try to replace other apps of the same type if it freezes, if other apps don't freeze, it may be a problem with individual app servers or the audio/video resources being played.
3. When playing videos online, if the network status is not good, it is recommended to change to a lower definition video to watch.
4. in the same network environment, compare other devices to access the same Internet content whether the same high latency, if the problem is the same, it may be a network problem, it is recommended to change the network to try.

1. Ensure whether the current network environment is stable and good.
2. Verify that the 4G/5G bands that the device is compatible with match the 4G/5G bands used by the operator.
3. you can consult the network operator whether the location is covered by 4G/5G network.
4. restart the device to see if it can be restored.

1. Please make sure that the same Sim can be used normally when inserted into other devices in the same location and under the same environment.
2. Please check if there is a small airplane icon in the status bar of the device, if there is, the flight mode is turned on, please turn it off.
3. please bring the device to your nearest Sim operator service office to check whether the device is compatible with Sim card and whether it restricts the IMEI of the device.

1, Please connect the device and the computer correctly through the standard data cable, and then go to the device settings - Network and Internet - Hotspot and Network Sharing, and turn on the switch of USB network sharing, the computer may pop up to recognize the new network, please select Allow.
2, It is recommended that the device keep upgrading the latest version of the system software, if it can not be solved, please provide your operation video for us to analyze and deal with.

1. Some networked applications may not be able to load resources: If the network is unstable, the application may not be able to load network data after connecting, it is recommended that you try to switch to another network (available 4G network and WIFI network comparison).
2. system resource tension: when connecting or switching networks, some applications will start some background services (such as the application store in the wifi environment set up software automatic updates) because of meeting the network conditions, instantly resulting in serious resource occupation, resulting in a slower response time, or even the system freezes, please wait for a short period of time until the program load is completed and can be restored.

The device can use a certain operator's SIM card, mainly depends on the device to support the network band is in the operator's coverage of the frequency band range, if in its range can be used, not in the can not be used, but there are individual carriers will require it to independently certified brand models can be normal access to its communications network, without its independent certification of the device may be locked disabled, if the case, the user can provide the device IMEI and other requirements to unlock the operator. If this happens, the user can request the operator to unlock the device by providing the IMEI information of the device.

Please check if your device can make calls, if it can make calls but just all the apps can't use the data network to access the internet, please try the following steps:
1.Please make sure the data switch is turned on, go to settings or pull down the notification bar to check if the card's data switch is turned on.
2. Whether the SIM card has been enabled for Internet access, whether it is in arrears and out of service, etc.
3. If you have inserted two SIM cards, you need to set which card you want to use for mobile data (if you just inserted the card, you will be prompted to select the main card on the screen, and you need to go to Settings if you don't select the card in time).
4. Please go to System Settings > SIM Card Traffic Management to check if the traffic limit is set.
4. Settings - System - Reset Options - Reset Network.
5. Ask the operator if the IMEI is locked, you need to contact the operator to unlock it, and what conditions are needed to enter the network and unlock it.
6. if all the above factors are ruled out and it still doesn't work, ask the user to grab the LOG and provide the IMEI and fault video analysis.

1. Unstable network or insufficient network speed: Please check whether the current cell phone network signal is stable, test whether the network speed is matched with the definition of the video being played, slow network speed or unstable signal can lead to playback of video lagging, you can switch to other networks to test, you can also reduce the clarity of the video currently being played.
2. In the peak hours of user use, for the video provider's server pressure is also a test, if the number of users in the same time period exceeds the maximum load of the server, the video transmission will be very slow, resulting in lag, it is recommended to replace the other video client playback to verify that the video provider's server problems.
3.Declaring insufficient system resources: If there are too many programs running in the background, it will lead to insufficient space for caching videos or insufficient system arithmetic, the playback process will be lagging or even stop playing; it is recommended to close the unnecessary programs running in the background and clear the cache or delete the useless files to free up more memory space.

1. Please check whether the signal strength of the device is normal when the problem occurs.
2. Consult your colleagues and friends if they have the same problem, if they do, it is very likely that the local network coverage is poor, please find the local operation to solve the problem.
3.Try to turn off the 4G switch of the device and then use it, because the 4G network is unstable in some areas, which is easy to interrupt the communication failure.
4. Is the SIM card provided by your carrier a standard Nano card? If the card is cut manually it may lead to poor contact of the card slot and various communication problems such as no network, weak signal, etc. It is strongly recommended to replace the standard Nano card.
5. There may be software failure, please upgrade your device to the latest version, if it is already the latest version, it is recommended to restore the factory settings after backing up the data and observe whether the problem is solved.
6.If your device has poor network signal problem no matter where you are, it may be a hardware failure and needs to be overhauled.

1, general cell phone voice calls default use 2G signal network, connecting the phone will be disconnected from other network signals, so open the device's VoLTE function in order to share the network during the call, because after opening VoLTE voice calls using 4G network signals, voice and Internet access to the same signal.
2, the operation path is: Settings-Mobile network-VoLTE, turn the switch on, and the SIM card also needs to open VoLTE function in the carrier service.

1. Please check the WIFI signal strength, if the signal is too poor it will result in no connection or no internet access (e.g. the device and router are separated by a concrete floor or wall).
2. Whether the system time zone and time setting of the device is consistent with the time zone and time of the current geographic location (e.g., if the user is in the UK and the local time is 2023/9/26 15:00, then the time zone and time displayed by the system should be 2023/9/26 15:00 London time), if the time is not consistent it will not be able to connect to the WIFI, which is a security rule of Google's native system.
3. Reboot the router, turn off and start the cell phone WiFi switch again, enter the correct WIFI password to connect to the network.
(This step should also consider whether the router is functioning properly and whether other devices can contact the network and access the Internet normally)
4. If step 3 is invalid, please go to Settings-System-Reset Options-Reset Network and check whether the router has set up MAC filtering and other security rules to block unfamiliar devices from accessing.
5. If the company network can not be connected or connected to the Internet, please find the network administrator to adjust the network security settings.
6. If the above factors have been investigated or can not connect to the network, you need to help capture the cell phone (Tablet) Log (we provide the operating method) and provide a video containing the phone (Tablet) and routing, including the connection process, we can analyze your network problems through the Log to give you the final solution.

If there is obvious damage to the SIM tray, such as broken or bent, and manual repair results in the inability to read the SIM card, you need to replace the SIM tray with a new one.

The reason may be put into the SIM card or TF card is misplaced or put the opposite lead to can not be removed, you can try to gently and slowly remove, and then follow the instructions guide to re-install, if you force to pull out the card tray will damage the phone, can only be solved by repair.

1. The two SIM cards have not been installed correctly (you can check the manual).
2. Is the SIM card damaged, and is there any serious oxidization at the chip that makes it unrecognizable?
3. Is the SIM card a standard Nano card? If the card is manually cut may lead to poor contact with the card slot, the problem of not reading the card, it is highly recommended to replace the standard Nano card.
4. Swap the two cards to see if the card slot can be detected, if the same card slot is still not read after swapping, then the card slot may be damaged.
5.After the SIM card is correctly installed, shut down and then restart the device whether the card can be recognized, still can not be read, then combined with step 3 to determine the card slot failure.

Android supports the format FAT32 by default. When you insert an external memory card that is not in this format for the first time, the phone will prompt that the external memory card needs to be formatted, and it will be recognized automatically after formatting.

1. Please check the brand model of the SD card, it has been confirmed that the compatible SD card brands are: SanDisk, Kingston, using other brands of cards may not be compatible.
2. Please check if the SD card is installed correctly, and then restart the device to see if the SD card can be detected.
3. Replace the SD card with a normal one to see if it can be read.
4. If you can read the SD card on your computer using a card reader, try formatting the SD card.
Format the microSD card operation method:
a. Insert the microSD into the card reader, and then plug the card reader into the computer;
b.After reading the SD card disk, right-click and select SD card, and choose Format in the right-click menu;
c.After entering the formatting interface, select the disk format as FAT32, and then click Kai to start formatting.

The eSIM mall currently only has European traffic items available for purchase. If customers need Asian ones, please select from the eSIM items of the carrier in your destination.

Please turn on the roaming function and configure the APN: internet, and then switch on the flight mode (or restart the phone).
The operation of configuring APN is shown in Figure 1 on the right.
2、Please provide a QRcode photo and a screenshot of the LUI interface in the LPA tool.
The way to enter the LUI interface is shown in Figure 2 on the right.

Step 1: Open Settings>eSIM Management
(1)Please make sure the data connection or WiFi connection network status is good.
(2)Settings>eSIM Management>Register and manage your eSIM
Step 2: Scan the QR code
(1) Method 1: Scan and Download>Scan QR Code
(2) Method 2: Load Image>Select the QR code image from the album.
(3) Method 3: Enter download>Enter the download address of the QR code.
Step 3: Complete the download and activate the use
(1) Click LUI button
(2) Carrier is enabled
Step 4: Connect to the network
(1) Open Settings>SIM & Traffic Management>Mobile Network>Click the enabled SIM card>Open Mobile Data>Open Roaming>Advanced>Access Point Name (APN)>Check and manually configure the APN site (only required if not automatically acquired)
(2) Test the Internet service
Attention:
- The QRcode of eSIM must be downloaded and installed within 60 days, if the installation is not completed within 60 days, the QRcode will be automatically invalidated.
- The QR code for the eSIM can only be installed once and should not be deleted after it has been installed on your device (if you delete the initial eSIM, a new QR code will not be provided).
- If you delete the eSIM from your device, it cannot be recovered and you will need to purchase a new eSIM and install it.

Step 1:Open eSIM management
(1) Please make sure the data connection or WiFi connection network status is good
(2) Settings > eSIM Management > Register and manage your eSIM
Step 2: Delete eSIM
(1) Click LUI button click LUI button
Step 3:Delete eSIM Finished
(1) Select the eSIM to be deleted>Delete
(2) The deleted eSIM will not be displayed.
Note: If you delete the eSIM from your device, it cannot be recovered, you need to buy a new eSIM and install it.

Step 1: Open Settings > eSIM Management
(1) Please make sure the data connection or WiFi connection network status is good.
(2) Settings>eSIM Management>Register and manage your eSIM
Step 2: Switch eSIM
(1) Click the LUI button
Step 3: Complete eSIM Enablement
(1) Select an unenabled eSIM
(2) Click Enable to finish switching
Attention:
- The newly downloaded eSIM is enabled automatically, if you need to enable other eSIM, you need to switch it manually.
- Only one eSIM can be enabled at a time.
- After enabling the new eSIM, before surfing the internet you need to make sure to turn on the mobile network, turn on roaming, check to set the access site APN to get normal, etc.

Step 1: Launch ESIM STORE APP
(1) Make sure the data network or WiFi connection is good.
(2) Make sure the "eSIM Support" switch setting in eSIM management is enabled.
(3) Launch ESIM STORE APP
Step 2: Purchase eSIM
(1) Select the eSIM traffic product that matches your plan.
Step 3: Complete Payment
(1) Click the PAY button to complete the payment.
(2) Enter the email address to receive the QR code and bill (only need to be bound at the time of the first purchase)
Step 4: Download QR code and activate
(1) Activate to download and activate the eSIM number directly.
(2) Open Settings>SIM & Traffic Management>Mobile Network>Open Mobile
Data>Roaming>Advanced>Access Point Name (APN)>Set the correct APN site (e.g., "Mobile Data").
Set the correct APN site (manual configuration is required if the system does not acquire it automatically).
(3) Test Internet access
Attention:
●This eSIM should be installed via QR code scanning within 60 days from the date of purchase. If it is not installed within 60 days, it will be invalidated automatically.
●If the eSIM has been activated on your device, it cannot be canceled or refunded.
● eSIM can only be installed once. Do not delete your eSIM after it has been installed on your device (if you delete the initial eSIM, no new QR code will be provided).
● If you delete the eSIM from your device, the eSIM cannot be recovered. you will need to purchase a new eSIM package and install it.
You can install up to 3 eSIMs. to continue installation, you need to remove partially disabled eSIMs.

Step 1: Launch ESIM STORE APP
1. Make sure the data network or WiFi connection is good.
2. Make sure the "eSIM Support" switch is enabled.
3. Launch ESIM STORE APP
Step 2: Start recharge
1. Click My eSIM
2. eSIM plan within validity period > Top up > Plan details
3. Expired eSIM>Top up>Plan Detail
Step 3: Finish Payment
1.Click PAY button to complete the payment.
Step 4: Top up successfully
1.Check My eSIMs>Flip
2.Data&Validity has been accumulated
Warning:
●Top-ups are only supported for eSIMs purchased in the app.

Analysis point 1: After the successful activation of the purchased code number, data traffic, roaming, and APN configuration have not been turned on;
Processing method: Enter [setting] [SIM card&mobile data] [Mobile net work], open [Mobile data], [Roaming], and configure [Advanced] [Access Point Names] to add a new APN and save. The phone needs to be restarted once after completion.
Name:
APN:View details of purchased products.

Scene: After the customer has purchased the product, the [activate] page directly jumps to [setting] and reports an error that the download has failed.
Analysis point 1: The customer has not turned on the eSIM function switch;
Processing method: The customer needs to enter [setting] [eSIM management] and open the [support for eSIM] function.
Enter [Register and manage your esim], confirm that the EID can be recognized, as shown in the figure, and then re-sweep.
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If there is still an error report, please go to [Support for eSIM] function and enter [Register and manage your esim].
If there is still an error, please enter [setting] [eSIM management] [Register and manage your esim] to take a screenshot of EID.
If there is still an error report, please go to [setting] [eSIM management] [Register and manage your esim] to take a screenshot of EID, and [model and hardware] to take a screenshot of Serial number.
Analysis point 2: eSIM function switch is turned on, but the EID is not recognized by eSIM toolkit, it is null;
Processing method: Please refer to "LPA Customer Complaints and Troubleshooting Methods 5.2.3.1EID Problems Chapter" in this document, the EID can be recognized normally. EID can be recognized normally, and then customers need to use eSIM toolkit to scan the QR screenshot or QR received by email again when the WiFi network is normal. Then customers need to use eSIM toolkit with normal WiFi network to scan the QR screenshot of the purchase or the QR received by email to complete the download and activation.
If there is still an error, please enter [setting] [eSIM management] [Register and manage your esim] to take a screenshot of EID, and go to [model and hardware] to take a screenshot of Serial number.

Please verify and provide the following information to customer service to help you process:
1、Please provide a photo of your QR card.
2、Please check whether the WiFi network connection or data network connection is unobstructed;
3、Please make sure that the "Support eSIM" switch is turned on and try to download again;
4、Please upgrade to the latest firmware version of the system and try again.

Scenario 1: The customer uses two physical SIM cards and closes SIM slot2 without enabling eSIM support.
If the customer turns on eSIM support, the eSIM EID is recognized as null.
Solution: First turn on SIM slot2, then turn off eSIM support, the device will reboot, then turn on eSIM support, the device will reboot for the second time, then eSIM tookit can recognize the EID.

Scenario 2: The customer uses two physical SIM cards, and when eSIM support is turned on, SIM slot2 is turned off, if the customer turns off eSIM support, then the device will reboot.
If the customer turns off the support for eSIM and then turns on the support for eSIM, then the eSIM EID will be recognized: null
Solution: First take out the physical card SIM2, then turn off the support for eSIM, the device will reboot, then turn on the support for eSIM, the device will reboot for the second time, and then the eSIM tookit can recognize the EID.

Scenario 3: The customer has a physical card in SIM1 slot and closes SIM slot2 when eSIM support is enabled, if the customer closes eSIM support, the device will reboot.
If the customer turns off the support for eSIM, the device will reboot, and then turn on the support for eSIM again, then the eSIM EID will be recognized: null
Solution: First take out the physical card SIM1, then turn off the support for eSIM, the device will reboot, then turn on the support for eSIM, the device will reboot again, then eSIM tookit can recognize the EID.

Scenario 4: There is a physical card in SIM2 slot of the customer, and the SIM slot2 is closed when eSIM support is turned on, if the customer turns off eSIM support, the device will reboot.
If the customer turns off the support for eSIM, the device will reboot, and then turn on the support for eSIM again, then the eSIM EID will be recognized: null
Solution: First take out the physical card SIM2, then turn off the support for eSIM, the device will reboot, then turn on the support for eSIM, the device will reboot for the second time, and then the eSIM tookit can be recognized to the EID.

1. When the customer does not enable eSIM function, EID is null, click [ ] to send mailbox verification code prompts that the device information cannot be recognized, resulting in mailbox registration failure.
Treatment: Please enable eSIM function [setting] [eSIM management] [support for eSIM] and confirm that eSIMtoolkit can recognize the device information, resulting in mailbox registration failure.
eSIMtoolkit can recognize the EID, as shown in the figure.
If the EID is null after enabling eSIM function, please refer to EID Recognition is Null" to solve the problem.

1. When the surrounding light is strong it is easy to appear halo, resulting in off-color, please avoid taking photos under strong light.
2. The software also adjusts the shooting effect and sets different color saturation to make the color of the photo more vivid and bright, the personalized settings of the software may also cause the photo to be off-color.
3. If the color correction and filter functions are turned on, please turn them off before taking photos.
4.If the device supports professional mode, you can choose the appropriate color temperature value to take photos in professional mode to get excellent color performance.

When the default storage location is the device's internal storage, the camera storage path is File Management: Internal Storage \DCIM\Camera.
If you want to change the storage path, you can change it inside the camera settings. When the default storage location is the SD card, the camera storage path is File Management: SD Card\DCIM\Camera

The brightness of the environment varies in different shooting scenes, the distance between the device and the subject varies, and a variety of different factors have an impact on the focusing algorithm, and the system will calculate the optimal shooting effect based on these factors, so the focusing time varies in different scenes, which is a normal phenomenon.

There is a camera protective glass on the back of the unit. If the protective glass is touched by fingers or otherwise dirty, a ray-like halo centered on the light source will appear when shooting lights.
To solve this problem, wipe the protective glass clean with a lens cloth and this phenomenon will disappear.

1. If the "Camera" app can not be opened, or the error is reported when it is opened, long press the "Camera" app - app information (circle i) - storage and cache - clear cache.
2. If you can't call the camera in other apps, please check whether you have disabled the permission of the app to use the camera, you can turn on the permission in System Settings-Permission Management-Call Camera.
3. If you can't solve the above two situations, you can restart the device to try.
4. Check if the system version is the latest, upgrade the latest system version and try again.
5. Please backup important data and restore the device to factory settings.

Dear users, Hello! In order to make T20mini can have excellent photo experience, for its configuration of 13MP SONY IMX328 rear camera, the camera has a large aperture of F/2.2, the size of the sensor area is up to 1/3.1 inch 5P, so the whole camera module volume is significantly larger, in order to achieve the perfect combination of functionality and visual effect of the appearance of the product, specially designed the secondary camera In order to achieve the perfect combination of function and visual effect, the secondary camera lens is designed as a decorative piece, the decorative piece has no shooting function, thank you for using Doug's products, if you have any other questions, you are welcome to write to us for consultation!

1.Please ask whether you are using the device comes with the camera to shoot, whether you have turned on the mirror/flip and other shooting effect switch, please try to restore the camera settings in the camera-settings; if it is just a three-way application to take pictures is reversed, please uninstall the application to re-install.
2. Long press the power button for 10 seconds to restart.
3. Long press "Camera" APP - Application Information (with circle i) - Storage and Cache - Clear Cache.
4. If the appeal operation is still abnormal, it may be a hardware abnormality, which needs to be overhauled.

1. Too many skin beautification or beauty settings: Please choose to manually adjust the degree of beauty.
2. Problems with the shooting angle: the device is too close to the face, if it is too far away, due to the angle of view, the shooting effect of the lens is different from the viewing effect of the human eye, resulting in distortion, it is recommended that you choose the right angle and distance to shoot when taking selfies.

1, the camera's beauty function can set the beauty parameters in advance (smoothing, whitening, enlarging the eyes, enhancing the eyes, slimming the face, etc.).
2, when using the front camera to take a selfie, in order to find the best and most beautiful shooting angle, the face is often not parallel to the device screen, but to maintain a certain angle (such as 45 degrees), so the photos taken will be slightly distorted (the phenomenon of near big and far small).
Suggestion:
a. Turn off the beauty function and try taking photos again.
b. When taking photos with the front camera, try to keep the subject parallel to the device screen.

1. may have turned on the portrait mode or beauty mode: in order to highlight and beautify the visual effect of the portrait, in this mode on the human face processing will use certain effects, such as micro-plastic surgery, may appear blurred illusion, if you do not need this effect , please close the settings interface and enter the normal mode and then try again.
2.Maybe the lens is dirty: it is recommended that you check and clean the location of the front camera (the location varies slightly from model to model, basically on the front of the body at the "forehead").

1. When you use the device to take pictures of TV, computer and other displays, vertical or horizontal stripes appear to flicker, this is because the TV or computer screen in the boot state constantly refresh the screen at a certain frequency, the refresh rate beyond the range of perception of the human eye, but the camera can be captured, rendered to the shooting screen can be seen on the stripes, this is a normal phenomenon, not a defect of the device.
2. Taking pictures under indoor fluorescent light environment, because the light will be flickering at 50Hz or 60Hz, which will cause interference when taking pictures and lead to streaks. Generally speaking, the device will reduce or eliminate the streaks in the photos through the algorithm, please focus until the water ripples disappear before taking photos.
3. When taking photos in a night environment, streaks may also appear due to low light, which can be improved by increasing the ambient lighting appropriately.

1. Please check the camera lens for dust or stains, please clean the lens before taking the photo again.
2.Clicking the photo button before focusing will result in a blurred photo, as the camera has a short focusing process, please wait until the focusing is complete before clicking the photo button or adjusting the focus manually.
3. Please avoid taking photos in low light or strong light (such as taking photos facing the sun).
4. Try to keep the device from shaking when taking photos.
5. The sharpness of your photos depends on the scene you are taking, so please select the appropriate photo mode for the scene you are shooting and adjust the camera's parameter settings. (If there is a Professional Mode", you can adjust the camera's shutter time, sensitivity, exposure time and other parameters through the "Professional Mode")."

1. It may be the application crash, you can long press the camera APP-application information (with circle i )-storage and cache-clear cache.
2. to customer long press the power button for 10 seconds to restart to try, or restore factory settings (remember to backup data first).
3. may be the camera abnormal, need to overhaul.

The product factory screen has been covered with a layer of protective film, please verify whether the scratches are on the protective film, please tear off the factory screen protector, and then confirm whether the phenomenon disappears. The protective film included in the factory is only used for packaging protection, we recommend that you replace the special protective film for daily use.

The screen is a delicate component, pressure applied to the screen during normal operation of the phone will not cause this problem, it only occurs when the screen is subjected to a relatively high level of pressure, which is a common feature of LCD screens and will recover on its own when the external force is removed. Please do not subject the device to high pressure to prevent the screen from shattering.

1. If this situation occurs when answering the phone, it may be the device in the pocket when there is an incoming call, the touch screen to prevent accidental contact caused by the touch screen, please press the power button to lock the screen and then relight the screen can be restored to normal.
2. Check whether the screen has oil, sweaty fingers lead to touch operation failure.
3. if this happens while charging, please check if the device is too hot causing it to die, and if you are using a standard charger, please unplug the charger before using the device.

1. When using some third-party applications, the touch screen is not sensitive, please make sure the device ROM has been updated to the latest version and try to update the third-party applications to the latest version as well. In addition, some third-party apps have design issues that give the illusion of an insensitive touchscreen.
2. If it is a model that supports glove mode, please check whether the glove mode is turned on or not, in this mode, the sensitivity of the touch screen will be greatly increased, which may cause the screen to be overly sensitive and lead to random jumps, it is recommended that the glove mode is turned off when using it without gloves.
3. If the screen blurring occurs when using certain applications, it is usually caused by the incompatibility between the application itself and the device system or hardware, please make sure the running conditions of the application match the device.
4. if the problem still exists after the above operations, it may be a problem with the touch screen hardware, please backup the data in advance and then overhaul it.

1. try changing the wallpaper of your phone.
2. there may be a temporary error in the device software, try restarting the device.
3. backup your data (contacts, text messages, photos, etc.) and then restore the device to factory settings, Settings-System-Reset Options-Wipe All Data.

1. Can the device be recovered by rebooting.
2.If reboot can not be recovered, please restore the system to factory settings (backup data before recovery).
3. if the above operation still can't be solved, the screen abnormality needs to be overhauled.

In accordance with the theoretical data of the laboratory our equipment can resist up to 1.5M drop impact, but it should be noted that, regardless of any material of the screen, in the non-conventional use of the environment, such as falling screen directly to the ground, or the screen directly collide with sharp objects have the possibility of cracking, if the screen is more serious, it is recommended to find an after-sales service.

1. Did this happen after dropping the device? If yes, the screen may be broken, please provide pictures or videos to show the problem you are experiencing, so that we can carry out the next step of troubleshooting.
2.Try to reboot the device, if it doesn't return to normal, try to restore the system to factory settings.
3. if it can't be solved, then you need after-sales service.

1. whether the secondary screen switch is on.
2.Restart the phone or even restore factory settings whether it can be restored.
3.If it is still invalid, please send it to the after-sales center for overhaul.

1. Impact of non-standard charger: charging with a non-standard charger may interfere with the touch screen, resulting in the touch screen reaction screen skipping, it is recommended to use the standard charger charging.
2. Environmental impact: In a high humidity environment (such as the bathroom), due to the abnormal reaction of the capacitance of the touch screen may cause problems such as screen skipping, it is recommended that you do not use it in a humid, high-temperature environment.
3. If it is a model that supports glove mode, please check whether the glove mode is turned on, in this mode, the sensitivity of the touch screen will be greatly increased, which may cause the screen to be too sensitive, resulting in random jumps, it is recommended that the glove mode is turned off when you use it without gloves.
4. Please make sure that both the cell phone software and the third party application are updated to the latest version, some third party applications have design problems, which may cause the illusion that the touch screen is not sensitive and the screen jumps.
5. after eliminating environmental and software factors can confirm that the touch screen is faulty and needs to be repaired and replaced.

1. Please check whether the light sensor is blocked or not, if the light sensor is blocked by foreign objects, the screen brightness of the device can not be adjusted automatically.
2. Go to "Settings-Display-Brightness" and check whether the "Auto Adjust" switch is on.
3.Please restart your phone to check if the screen brightness auto adjustment function is in effect.

1. Nowadays, cell phones are equipped with distance sensing function, when the distance sensor on the top of the screen is blocked (e.g., put it on the ear, cover the top of the screen with your hand), the screen will be closed at this time, and this phenomenon is a normal situation.
2. The power saving function of the device, the device has a built-in light sensing system, when the device is close to the head when making a phone call, the light sensing system detects that the light is dimming and enters the black screen state to save power, the device leaves the head, the screen returns to brightness.
3.If there is no cover on the top of the screen also black screen (such as being placed on the desktop), please check whether there is any stain in the sensing area, if there is, please clean it, if there is no stain, try to restore the system to the factory settings, if it still can't be solved, then you need to after-sale overhaul.

Currently our products do not support the pressure-sensitive level function, only in the screen to draw a single line, even with the use of touch pen with pressure-sensitive, but also can not be like taking a pen to write on the paper, by pressing the strength of the thick and thin.

I'm very sorry to trouble you, please open the system to report points to see if the touch is in place.
Path: Settings - About phone - version number on 7 consecutive clicks, and then return, system - Developer Options - input (display tap operation feedback and pointer position) both switches are open, touch can see the center of the crosshairs whether the center position of the function buttons are positioned in the function buttons, you will be able to know is the touch is not sensitive or the finger touch offset, if there is still doubt, please record a video of the operation to me, thank you! !

1, the tablet will restart or restore factory settings to see if it is restored to normal (troubleshooting whether software problems), do not restore and then operate the next step;
2, open the developer options in the settings, open the touch track record to see whether the touch point and response point deviation, as well as the tablet itself to enter text whether the touch effect;
Open developer options path: about the tablet - version number - seven consecutive clicks to enter the developer mode - return to the "system" - developer options "Developer Options - display tap operation feedback button to open - pointer position to open - finger sliding on the screen to see if the touch effect of the tablet's own input text. -Finger sliding on the screen to see if there is a track line record, there is a track line and then record a video to see where to take effect when touching.
3, if the target touch position and the actual touch point trajectory is not consistent, it is the finger touch offset, please operate the touch point accurately (this problem occurs in the Smini, because the screen is too small, is not suitable for people with thick fingers to use);
4、If the target touch position and the actual touch point trajectory overlap, but the response position is offset, it is TP jump point, please replace the touch screen;
5, if there is no touch screen, but the screen jumps chaotically, then exclude the software problem directly after the judgment of TP jump point, please replace the touch screen.

1. Press the power on button to lock the screen and then light the screen to see if the touch screen can respond.
2. Turn off the computer and then turn it on to see if the touch screen can respond.
3. You can use OTG to connect a wired mouse to operate, troubleshooting touch failure or system jam, if the system is jammed, you can enter Recovery mode to restore factory settings.
4. If it is a touch failure, you need after-sales service.

1. Whether there are dirty, water stains and other coverings on the screen, please wipe clean and retry, if there is a film, please tear off the film and try.
2. Long press the power to restart whether it is normal.
3. You can connect the Bluetooth mouse or use OTG to connect the wired mouse to see if the version is the latest, if not the latest, please update the software version.
4. Please enter Settings-System-Reset to restore the device to factory settings after backing up your important data.
5.Some touch screen failure caused by parameter error can be recovered, if the problem is still not solved after restoring the factory settings, after-sales service is needed.

Need to provide specific models, and then look at the special report, laboratory test data please refer to: in -10 ℃ ~ -1 ℃, charging current limit, down to -11 ℃ to stop charging, and pop-up low-temperature stop charging alarm prompts: " Battery temperature is too low, please remove the charger "; 0 ℃ to restore the constant current charging; -25 ℃ pop-up low-temperature shutdown warning prompts and shut down the machine, return to normal at room temperature; if the negative 10 degrees of the case, it will lose 30%-35% more power than under normal use.

1. Please verify how much power is consumed for how long, the usage environment and scenarios that consume power fast, such as whether it is used for a long time in a place with extremely low ambient temperature, the usage scenario is connecting to mobile networks and WIFI with unstable signals for a long time or turning on the navigation and positioning function, whether it is playing videos with high highlights for a long time or running a large-scale game, and a large number of programs retained in the background of the device are running (refreshing, positioning, etc.),. All these situations will quickly consume battery power.
2. When the phone's power is rapidly decreasing, you can check the power consumption chart to see which apps are consuming power: click "Settings - Battery - Battery Usage", and you can take some targeted control measures for the apps that consume a lot of power, such as adding the cleanup after locking the screen, don't add the background protection, prohibit the associated startups, background behavioral control, and regular wake-ups. Wake up at regular intervals.
3. If there are some apps in the power consumption ranking that are not commonly used but have been consuming a lot of power, the app may be abnormal, so it is recommended to uninstall it and replace it with other apps of the same type to avoid consuming a lot of power due to the problem of an app itself.
4. Turn on the "Show remaining battery percentage" switch to keep track of the power changes.
5.If there is a prompt for a new firmware version, please update to the latest firmware version, each update will optimize the operating efficiency of the system to improve.

1. Please ask whether it has caused personal and property damage, please keep personal safety in the case of the battery fire extinguished to check the equipment.
2. Please provide relevant pictures, videos and equipment IMEI and SN numbers of the battery fire and explosion.
3.Please send the battery fire, explosion equipment back to the company to analyze the cause.

1.The 66W we are talking about is the maximum power of the charging process, the current (power) of the battery charging is a curve fluctuation process, the system will intelligently select the optimal charging power at each point in time, not every moment to keep the 66W charging, especially when the battery is almost fully charged in order to protect the health of the battery, the system will enter the trickle charging mode, the charging power is very small.
2.Running AnTuTu Battery Detection will automatically enter the game mode, the charging power in the game mode is generally 10W (5V2A), at this time, AnTuTu Battery Detection shows the voltage, current and power is not accurate.

1. Most mobile power output power is low, if the device is running high energy consumption applications in the background when charging, or even use it while charging, then the charging speed will be very slow, resulting in the device power does not increase, or even decrease.
2. Charging speed will be slowed down in high temperature environment, or when the temperature of the device itself increases, please leave the device in a suitable environment for charging.
3. it is recommended to gradually check whether the data cable, the stability of the connection between the data cable and the phone, and the performance of the mobile power supply are normal.

I'm very sorry to trouble you, the use of wireless charging requires cell phone support for wireless charging function, and Doug part of the wireless charging function of the device using the wireless charging protocol is the QI protocol, so please first confirm that you are using a wireless charger supports the QI protocol, and then the following steps to troubleshooting:
1, wireless charging power is limited, you need to put the device in the right position to charge (the principle of wireless charging is that the conductive coil of the charging base generates an electronic magnetic field when it is energized, and the conductive coil on the receiving device feels the magnetic field within a short distance and then converts it into electrical energy, thus charging the receiving device);
2, if possible, please use other cell phones that support wireless charging function to activate the wireless charger and then quickly place the Doogee device on the wireless charger, which will be better detected, because the triple-defense device uses impact-resistant silicone material, which may have a certain impact on the wireless charger's detection.

1. The charger or device charging connector has poor contact, resulting in failure to recognize the standard charger. Please check if the connector and jack are clean, if there is dust or dirt, it is recommended to use a brush dipped in alcohol to wipe clean, wait for the alcohol to evaporate and dry, and then plug the charger again to charge.
2. If you use a non-standard charger, please replace the standard charger to charge.
3.If the above measures can not solve the problem, you need to send the device, charger, data cable to the after-sales service.

In order to protect the safety of equipment use, when the temperature of the equipment reaches a certain threshold will limit the power consumption, reduce the charging speed, hot weather in summer, high ambient temperature, equipment heat dissipation becomes worse, compared with the low temperature environment in winter, the charging speed will be relatively slow, which is a normal phenomenon. Solution:
1. Wait until the temperature of the device drops before charging.
2. It is recommended to close the applications running in the background when charging to avoid the temperature rising due to high power consumption of the phone.
3. it is recommended to charge the device in a natural environment below below 30 degrees Celsius or in a room with the air conditioner on.

1. Please check whether the host charging port and charger socket are damaged.
2. Please use the standard charger to charge the device for more than 30 minutes and check if the device shows charging prompt.
3. If you can't charge the device, please use the same specification charger and data cable to cross-verify whether it is the charger's problem or the host's problem.
4.If all of the above factors are ruled out, the main board may be faulty and needs to be serviced.

Reverse charging refers to the fact that devices such as cell phones can be charged wirelessly or wired to provide power to other supported devices. The main technologies for reverse charging are wireless reverse charging and wired reverse charging, both of which require certain conditions and precautions to be met.
The advantage of the OTG reverse charging feature can instantly turn a smartphone into a mobile power source, directly charging other electronic devices.

1. When the prompt icon of charging appears and the battery power does not increase or decrease, please check whether the device is connected to a computer USB port and other low-power devices for charging, because the output power of the USB port is very small, and if the system of the device at this time is running a relatively high-energy-consuming application (including running in the background), the charging input is offset by the energy consumption of the cell phone itself, resulting in the charging of the phone without any change in the power level.
2. If this kind of problem occurs when charging with the charger, please deal with it in the following way:
a. Please close the program running in the background of the device and leave it charging to see if it can charge normally.
b. Please use the standard charger that comes with the device to charge the phone.
c.Please upgrade the system to the latest version, and if necessary, restore the device to the factory state to find the problem.
d.Replace the charger with other models of the same specification, if it can charge normally, the charger is faulty, please find the seller to replace the charger.

1.usually the lower the device power, the faster the charging speed, when the device power reaches more than 80%, the battery power is close to full charge, in order to ensure the use of safety and prolong the battery life, the charger output charging current will be gradually reduced until full, this process is known as trickle charging.
2, in the whole charging process, the output current and voltage of the charger is not fixed, but will be dynamically adjusted according to the state of the device, because of this, sometimes you may mistakenly think that the device is charging slowly or there is a problem with the charger, in fact, this is a normal phenomenon, please rest assured that you can use.

1. Please check whether you are using the standard charger, non-standard small load charger or computer USB port and other devices charging power is very low, when the device battery is over-discharged, the low-power charging can not support the device to keep the device turned on, the phenomenon of repeated reboots may occur, so please use the original charger charging.
2. If the battery is completely drained, please charge it for about ten minutes before trying to turn it on.
3. if the above troubleshooting does not solve the problem, it needs to be serviced.

1. Please make sure to use the original charger and data cable.
2.Please do not use the device during the charging process, such as playing videos, playing games, etc., because the screen and the system will divert a large amount of current during use, making the actual charging power smaller and the charging time longer accordingly.
3.Charging time is related to the size of battery capacity and power.

1.Deleted a third-party app due to wrong operation, please reinstall the app.
2. due to wrong operation, the app icon was moved to a folder in the home screen and the app can't be found, please pull down the home screen and then enter the app name in the search box to find the app.
3.If none of the above methods can solve the problem, please reset your device to factory settings after backing up your data, and then reinstall the required apps.

1. We suggest you download the official version from the app store and install it, if you need to install the installation package downloaded from unofficial channels, you need to set the trusted source of the program, please turn on the "Allow apps from this source" switch in "Install Unknown Apps" in the information interface of the software installation wizard.
2. Please check if the memory space is enough, you can use the system settings to clean up the system to free up memory space.
3. Internet connection is unstable, the installation package is corrupted or the download is incomplete, please delete the installation package and try to download again.
4. Long press Google Play Store-App Info-Storage and Cache-Clear Cache-Clear Storage.
5. downloaded third-party apps may not be compatible with the device, so it can not be installed successfully, please try to download other similar apps.

This application may not be compatible with the current version of your device's operating system. It is recommended that you check the compatibility of the application by referring to the user reviews in the major application markets.

There are differences in the operation path of different models, refer to the following:
1.Settings-Smart Assist-App Split
2.Settings-Apps-App Split
3.After setting app split, two app icons will be generated on the desktop, and you can log in two accounts at the same time.
Tip: Only some apps can use the split function.

According to Google Android security policy, starting from Android version 5.0, installing apps to external SD card is no longer supported, but you can choose the data storage path for each app to external SD card, such as navigation data, photo and video recordings, music and so on. As each app has different UI style, if you need to use the above function, you need to set it in each app separately.

1. Please check whether the memory space is enough, clear the application market or other storage and cache download tools, and at the same time delete the original installation package and download again.
2.The network connection is unstable, the installation package is corrupted or the download is incomplete, please delete the installation package and download it again.
3.The downloaded package is incompatible with the current operating system version of your device, we suggest you check the compatibility of the application, you can refer to the user reviews in the major application market.

1. If the downloaded third-party apps flash back when you enter, the device is not compatible with this app, we will record the problem and improve it with subsequent optimization.
2. If the downloaded third-party apps flash back once in a while, it may be that the device has been running for too long on the power on, and the running memory is insufficient, you can close the unused background programs or restart the device, and then observe whether there is any improvement.
3.If the flashback occurs for individual factory preset apps, long press the app icon - app info (i with circle) - storage and cache - clear cache, if the flashback occurs for all preset apps, please restore the system to factory settings, or even need to connect to a computer to upgrade the system.

1. If there is no regional restriction and the Google Play Store can be downloaded, it can be used.
2. if the download can not be used, it may be a compatibility problem, please change other browsers to download, or download other versions of this app to try;
3. If you still can't download, please change other similar function software to use;
4. If the download and installation can not be, please check whether the memory is sufficient;

1. Please make sure if the mute is turned on, if so increase the volume by volume + button or in the settings.
2. Play music to see if there is sound, no sound need to check the speaker outlet hole blocked or damaged.
3. you can try to restart the phone or restore factory settings to see if it can be solved (please backup your data before restoring factory), if it can't be solved, you need to overhaul the hardware.

1. Please make sure the speaker's sound hole is not blocked or clogged (if the device is using under-screen sound, there is no need to check the earpiece sound hole) Please pay attention to observe whether the protective cover/case or film has blocked the sound hole;
2. If the sound hole is dirty and clogged, you can try to use a softer brush dipped in alcohol to clean it, if it is not effective, please try restoring the system to factory settings, if it can't be solved, then after-sales service is required.
3. no sound problem please make sure the device is not set to mute or do not disturb mode, press the volume button to maximize the volume, record a video with audio playback test to determine whether the speakers are faulty, if the speakers do not sound, need to overhaul.

1. Please audition other songs or audition through headphones to compare and test whether there is any problem with the sound source.
2. When playing songs, if the volume is adjusted too high may appear a slight popping sound, it is recommended to reduce the volume appropriately.
3. Please check whether there are impurities in the speaker outlet holes, do not block the speaker outlet holes.
4.We suggest you try to play the songs with the third-party music player you downloaded first to compare the sound quality difference.
5. check whether there is strong magnetic field interference near the device or speaker (if the speaker is connected), the device is disconnected from the speaker connection and played independently to try to listen to the sound quality.

1, if the tablet can not play 1080P video streaming is Neflix (Netflix), is because of policy reasons, only the middle and high-end models currently support the playback of Neflix high-definition video, part of the model is not currently supported (only playback of Neflix standard definition video);
2, DRM L1 because it involves too many streaming services, individual systems or protocols have differences and are not compatible;
3, Explicit support for Disney+, HBO Max, Hulu, Amazon Prime, Apple TV+, etc.

1. Make sure that the phone/tablet to be connected is turned on and has enough power.
2. make sure the phone/tablet to be connected is within the effective distance range (10 meters) and Bluetooth is turned on.
3. Make sure the phone/tablet is not connected to another Bluetooth device of the same type. 4. restart the phone/tablet and try to search again.

The device cannot connect with other Bluetooth devices, there may be four reasons and solutions:
1. When the Bluetooth of other cell phone cannot be searched, please make sure the Bluetooth of other cell phone is turned on and in searchable status.
2. When the Bluetooth headset can not be searched, please confirm that the headset has been in a searchable state (into the pairing mode), different Bluetooth headset into the pairing mode operation method is not exactly the same, the relevant settings, please refer to the manual of the headset or check online, generally red and blue lights alternately flashing is the matchable mode.
3. When you send a file, it prompts that you can't connect with other cell phones, please check whether other cell phones support receiving files, or whether they support receiving this type of file.
4.In some cases, the cell phone can not connect with other devices due to unsupported protocol, it is necessary to check the Bluetooth protocol support of the cell phone and other devices.

1. Please check whether the device to be paired is on Bluetooth pairing mode, and keep the distance between the two devices within 10 meters, with no objects blocking the middle.
2. Turn the device Bluetooth off and then turn it back on, and search for pairing again within the Bluetooth pairing time limit of the other device. (Some devices have a time limit for Bluetooth pairing mode, overtime will turn off the pairing mode and need to be turned on again)
3. If the Bluetooth pairing record has the record of connecting to the device before, but the pairing fails this time, please delete the connection record, and then search for the device to pair again.
4. If the pairing still fails, please go to "System - Reset Options - Reset WLAN\Mobile Data Network and Bluetooth Settings" to reset the Bluetooth function and re-pair. (Sometimes you may need to reboot both devices)
5. If the Bluetooth of your device is currently connected to another device, please disconnect the current connection and then connect the device you need to connect.
6.If the device can not connect with any Bluetooth device, please restore the factory settings after backing up the device data, if it can not be solved, then the Bluetooth module may be faulty and need after-sales service.

1. The number of ""paired devices"" in the storage of some cars is limited, and pairing cannot be performed when the upper limit is reached, please delete a device in the pairing list of the car, and then try to start the pairing connection again;
2. If you still can't connect after the above operation, please clear the pairing list of the device side and the car side, restart the car and start searching and pairing again;
3. some car Bluetooth is set to not be able to connect passively, and can only be connected by actively pairing the Bluetooth device to be connected through the car's search.

Please click Settings - Connected Devices - Bluetooth Paired Devices to see if Media Audio is connected. If it is not connected, please make sure the headset is not connected to its device and then reconnect the Bluetooth headset.

1. Ensure that the cell phone (tablet) and Bluetooth device are within the effective range (10 meters), and that there are no serious interfering factors such as reinforced concrete walls or floor slabs blocking between them.
2. If the phone is placed in your pants pocket, your body will block the Bluetooth signal when squatting or bending down, and there will be intermittent situations.
3. Stay away from strong magnetic field and electromagnetic wave interference environment, such as working electromagnetic furnace, next to the signal tower.
4. Please replace other Bluetooth devices with normal function to test the connection of your cell phone (tablet), so as to exclude the problem of a certain Bluetooth device.
5. If all the above factors are excluded, it may be a cell phone (tablet) Bluetooth failure, please backup data and restore factory settings, such as can not be resolved, the need for after-sales service.

1. Make sure the car Bluetooth is in pairing mode, and the device and the car are within the effective range (10 meters).
2. Different brands of car Bluetooth open "discoverable mode" in different ways, most of the car set in the Bluetooth interface, turn on the Bluetooth switch, turn on the Bluetooth visibility switch, and enter the device discovery interface, and then from the cell phone (Tablet) Settings>Bluetooth>Search for devices to initiate the search operation. (The detailed method of different car machine needs to check the car manual operation, or consult the car machine manufacturer customer service)
3. The general car Bluetooth discovery time is set to 60~120s, after the time has passed, the cell phone (tablet) will not be able to search the car Bluetooth, please reopen the car "Bluetooth visibility" switch to search for the connection again.
4. Some in-vehicle Bluetooth does not allow connections from cell phones (tablets), but only by the in-vehicle Bluetooth search to connect to cell phones (tablets).

supports

1.Sweat stains, dirt, and damage at the fingerprint will affect fingerprint recognition, please exclude the above factors.
2. Please check whether the fingerprint contact button is worn or deformed.
3. Wait for a few seconds after pressing the fingerprint to see if the fingerprint recognition is delayed.
4. Restart the device, if it still can't be recognized, please re-enter the fingerprint after unlocking the device with password.
5. if all the above factors are excluded, it may be the fingerprint module failure, need after-sales service.

1.The compass needs a clean magnetic field environment, please make sure that your environment has no strong magnetic field interference, before each use, you need to draw the 8-word calibration chart, as many times as possible to ensure its reliability.
2.Compass has added advanced optimization and compensation algorithms, and its stability has been greatly improved, but many third-party compass apps on the market will have different degrees of jitter due to the limitations of the algorithms, and it is recommended to use compass apps that have both a high number of positive reviews and positive feedback.

1. The magnetic field sensor is susceptible to interference from the external environment. Different models of cell phone compass indicates that the direction deviation is less than 5 degrees, which belongs to the normal range.
2. Please check whether there are "unofficial holsters, magnets, electromagnetic ovens, microwave ovens and other" sources of interference with strong magnetic fields, please stay away from sources of interference before using the compass.
3.Suggest restarting the phone to see if the function is restored.

There are two types of microphones: analog and digital signals. Our cell phones (tablets) support microphones with analog signals (e.g., regular headphone cables with microphones) and cannot transmit microphone signals with digital signals.

There are currently three options for backing up your old device data:
1. settings-coogle-backup
(apps/photos and videos/SMS and MMS/call logs/device settings/google account data) Backup immediately, this feature requires a stable and efficient internet connection.
2. file geek (login google account) transfer - nearby sharing, you can accept or send (video/apps/pictures/downloads/audio/documents and other files), after going in, click settings - nearby sharing - details - learn about the nearby sharing function, there is a tutorial on how to operate it.
3. you can use the data cable to connect with your computer, and then copy the photos/music/videos to your computer, and then copy them to your new phone.

1. Please confirm the location of the heat, in what environment, under what circumstances the heat, such as charging, or charging in the game, play video, etc..
2. If the heat is only in the CPU position is a normal phenomenon, please do not use or charge in a high temperature environment to avoid overheating of the device.
3. Do not use the device while charging, system operation and charging at the same time to generate heat will lead to an abnormal increase in the temperature of the device, there is also a risk of accidents.
4. Because of the strong protection of the shell material, the temperature of the three-proof equipment may be 1~2℃ higher than that of other equipment.
5. If the temperature rises abnormally in normal use, please check whether you have opened too many programs running in the background, or are running a large game, please close the background in a timely manner temporarily unused programs.
6.If the device is still abnormally hot when you exclude the above situations, please stop using it immediately, and it needs to be overhauled.

If you turn on the camera's flash while using the flashlight, the flashlight will automatically turn off because the flashlight and the camera flash are the same etc., and the camera has higher authority to use the flash than the flashlight.

1.This product uses headphones as FM antenna, please plug in the headphones when using the radio, the quality of headphones on the market varies, poor quality headphones have poor signals, the number of radio stations searched for is small, or there will be noise in the searched stations, it is recommended that you use our optional headphones or other headphones purchased from regular channels.
2.The FM signal of the radio station is easily disturbed by the transmission distance and the outside airwaves, it is recommended to change the listening position and try to find the best listening place.

FM antenna length needs 1 meter to 1.5 meters, for the compact size of the cell phone or tablet can not be so long antenna inside the device, through clever design, the use of headset cable as FM antenna, connected to the headset, the cell phone or tablet will be able to receive FM broadcasts.

If the customer is using a TYPC headset, the cell phone (tablet) plug headset or can not open the FM function, there are the following reasons:
1. If you use a digital signal TYPC headset, the standard universal are going USB digital audio signal, this is not support FM, can not receive FM band.
Solution:
1. Use analog signal TYPC headset, this can support FM, but not as good as 3.5mm headphones.
2.If you can't buy TYPC headphones with analog signal, you can choose to buy headphone adapter, and then use 3.5mm round hole headphones (analog signal), but also note that not all adapters are compatible to use.

Hello, thank you very much for your attention to our products, MIL-STD-810 is the U.S. Department of Defense (DoD) for military products designed for a series of environmental testing standards, there is no commercial organization or agency certification. Our three-proof machine are commercial products, waterproof, dustproof and drop-proof product characteristics are in accordance with the MIL-STD-810 standard in the laboratory after the test to reach the appropriate conclusion. If you have any other questions, you are welcome to write to us again, thank you for your support!

Biological temperature measurement range: 30℃~45℃.
Biological temperature measurement distance: ≤3m

Support HDMI interface, but need USB to HDMI adapter cable to connect up with the same screen, the key is the adapter cable is more difficult to pick, manufacturers are very much, different manufacturers may use protocols and material quality differences, resulting in most of the adapter cable and the cell phone (Tablet) is not compatible and can not be used.

Inform the customer of the waterproof level of this device, ask under what circumstances the water, if the customer must ask for repair, can be sent to the repair center for water analysis, to give a report to confirm that the customer's use of water or the phone itself is not waterproof enough to cause water ingress.

Bluetooth Keyboard Pairing Method:
1. turn on the power on the right side of the keyboard.
2. Press and hold the FN+C key for 3 seconds, the keyboard's WiFi indicator will flash blue.
(Some models can turn on the Bluetooth pairing function by simply pressing and holding the Connect key in the upper right corner)
3. Enter the tablet, open Bluetooth, search for Bluetooth keyboard, select the Bluetooth keyboard name to connect to pair successfully.
Video tutorial: https://1drv.ms/u/s!AvX9KABcpSV1pEBNbnMVZWnQG494?e=WdVNuG

There are two kinds of tablet keyboards we provide:
1. bluetooth keyboards have a built-in battery and require a charger to charge the keyboard.
2. docking keyboards do not come with batteries and rely on the contacts connected to the tablet for power.

I am very sorry to trouble you, docking interface and charging interface belong to the same bus interface (I/O interface), there will be a conflict when using at the same time, can not be used at the same time.

In the process of using the USB plug, headset plug or card bracket in the use of open need to reset it, if you do not do a good job of resetting, will lead to the loss of waterproof performance of the phone.IP68 waterproof standard is 1.2M water depth, soak in water for 30 minutes, the phone does not get into the water, the function of the OK; However, we are testing to higher standards, soaked in 2M water depth 1H, the phone does not get into the water, the function of the OK.

In order to pursue excellent image quality, the device adds a DSLR-class image processing chip, which consumes a relatively large amount of power, and the heat dissipation of the device is also limited by its size, so there will be significant heat generation in the case of prolonged and continuous photo taking.
In order to prevent the device from overheating, we have done a lot of optimization work on the resultant design and power consumption control at the beginning of the product design to control the temperature in an acceptable range, so the device will not have serious heating problems.

Hello, through the comparison of similar products in the market, in order to provide users with cost-effective products as much as possible, the charging voltage and current set by our T20MINI is 5V/2A.
The relationship between charging power and heat generation is that the higher the charging power of similar products, the higher the heat generation, and cell phones and tablet PCs are highly integrated products, the heat dissipation effect can not be compared with a motorcycle, thank you for choosing Doug's products, if there are any other questions, you are welcome to write to us.

1. Please turn the headset to make sure it is fully inserted.
2. Replace the headset with one that works on other devices, if it works, the device is fine.
3. Use this headphone cable for use on other devices, if it also does not work, the headphones are damaged and need to be replaced. If it works on other devices, it means there is a problem with the USB side of this device and it needs to be tested and repaired.

Enter the settings, sensor calibration inside the recalibration can work properly, if not calibrated, need to be sent back to the after-sales test.

1. check if there is something covering the distance/light sensing part (next to the camera), wipe it down and see if it works.
2.Check if there is something covering the distance/light sensing part (next to the camera) on the cell phone (tablet) case or holster, remove it and see if it works normally.

1, the external storage system format supported by the tablet is FAT32, if you insert the flash drive format does not match, you need to pull down the status bar and click on the sd, it will prompt the formatting, after formatting can be used.
2, check whether the OTG line connecting the flash drive is normal, you can replace the flash drive or insert the mouse to test and verify.

The Bluetooth keyboard and the charging interface use the same channel (I/O port) for data transfer and there will be a conflict if they are used at the same time, so you can't use the data cable to transfer data files when using the Bluetooth keyboard.

It may be the problem of the USB cable, or PC interface problems, it is recommended to change a USB cable and change a PC to try.

1. Please confirm whether your phone supports OTG function, OTG function needs hardware support, not all Android models support OTG by default.
2. Please make sure the format of the connected microSD card is FAT32 format, whether it exceeds the maximum SD capacity supported by your phone, etc.
3.When the OTG cable is connected to a USB storage device, the phone provides power for the USB storage device, and may not recognize the USB device for USB removable drives that consume relatively high amounts of energy.

1. Device charging: Device A is plugged into the OTG cable, and the other end is connected to device B through the data cable, A can charge B (device A is required to support OTG and reverse charging)
2.Connecting Mouse and Keyboard: The device needs to provide power for the mouse or keyboard when connecting, due to the high power requirement of some external devices, they may not work properly, if you encounter such problems, please try another mouse or keyboard.
3.Transfer files: Connect the device to USB memory via OTG cable, then enter "File Management" to transfer files between the device and the USB memory device.

I am very sorry to trouble you, docking interface and charging interface belong to the same bus interface (I/O interface), there will be a conflict when using at the same time, can not be used at the same time.

Reason: Keyboard, mouse, headset and charging port use the same channel (I/O port) and there will be conflict when using them at the same time.
Solution: to listen to songs and charging and other functions at the same time, it is recommended to use a Bluetooth headset (it is not recommended to use a cell phone while charging).

When using NFC to swipe your card, please bring the NFC antenna part on the back of the phone (usually the upper middle part on the back) close to the reading range of the swiping area to swipe your card normally.
If you are using Googlepay service, it may not work because the firmware version does not match with the area of use, please get the latest firmware version in Settings-System-System Upgrade and upgrade the update.

1. On the dialing screen, type "*#06#" to check.
2. on the phone with the phone (tablet) card inserted, Settings-About (Tablet)-Status Information-IMEI.
3. you can check it on the sticker at the bottom of the box.

1. The accuracy of the device positioning and GPS satellite signal strength and map accuracy, usually in thunderstorms, high-rise buildings or next to the underground parking lot, the car affixed with a metal film and other places, or cell phone sets a metal phone case have a greater impact on GPS positioning.
2. Please locate in the surrounding environment of the location of the more open, if the car positioning is not allowed, you can move the device to try outside the car, to exclude the interference of the metal film.
3. if possible, it is recommended to use the navigation software with WIFI and data network assisted positioning, this positioning will be more accurate than only GPS positioning.