How To Guide Install Lenovo Xiaoxin P11 Pro 2021 Original ROM (TB-J716F)

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gunalarix8

Senior Member
I've locked my device 3 months ago, it worked fine, I had Widevine L1 and everything , until I noticed 3 days ago that my widevine certificate downgraded to L3 even though the device is locked + the ''OEM CRYPTO API Version" downgraded too to v15 instead of v16. I was on .560 .
Naturally I thought that upgrading to ZUI 14 would fix this issue .. But it did not ..
So, I unlocked the bootloader, downgraded to 12.6.211 rechecked ''OEM CRYPTO API Version" and, reupgraded to v16 ! I did all the updates up to .560 ! At each update, I rechecked the version, and it remained v16. Until I updated to ZUI 14 through OTA with a chinese VPN and then the ''OEM CRYPTO API Version" changed back to v15. I tried relocking the bootloader, but it remained not only in v15, but I was still stuck with Widevine L3 ... This is such a weird, frustrating and disappointing issue from Lenovo ...
The problem is that after I upgraded to ZUI 14 ... I'm not able to lock the bootloader when I'm on .560 as it
Note that my brother (with the exact same tablet on .560) did not lose hist widevine L1 certificate.

Any help would be really appreciated
do you familiar with QFiL, i think you can try to clone the partition from your working tablet L1 (the brother) and apply on your current tablet. i mean whole partition. 😂
 

ShazlieyAzizan

Senior Member
Dec 1, 2017
232
68
Petaling Jaya
Quick question, my bootloader is locked and I'm at zui14, is it possible to flash zui12 using qfil method? Too scared to try because my warranty has ended two days ago and the reason why I want to roll back because I want to sell the tablet, and the buyer demand PC MODE which is only available on ZUI13. ( basically still can access in ZUI14 using SetEdit but too much work huhu) Do let me know if anyone is able to flash ZUI12 after installing ZUI14 on your tab, thank you in advance! ( Copy and paste comment from another post cause both has the same topic )
 

f1tm0t

Senior Member
Jan 1, 2022
99
42
Lenovo P11
Quick question, my bootloader is locked and I'm at zui14, is it possible to flash zui12 using qfil method? Too scared to try because my warranty has ended two days ago and the reason why I want to roll back because I want to sell the tablet, and the buyer demand PC MODE which is only available on ZUI13. ( basically still can access in ZUI14 using SetEdit but too much work huhu) Do let me know if anyone is able to flash ZUI12 after installing ZUI14 on your tab, thank you in advance! ( Copy and paste comment from another post cause both has the same topic )
You can flash ZUI 13: https://forum.xda-developers.com/t/tb-j716f-13-0-430_st_220113-full-rom-for-qfil-qpst.4524453/
 

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  • 2
    Hello! Has anyone ever encountered such a thing that after the bootloader was blocked, the message "Your device is corrupted" appeared, then what is in the picture, and if you click on the "Start" button, then the device reboots and this screen appears again? If so, please tell me how to fix it
    You need to follow the steps:

    1 - Unlock Bootloader again
    1.1. You need the sn.img file provided by Lenovo, but the website that provided this file is not working properly. Then you can try via the link (which is the easiest way, but it didn't work for me): http://cdn.zui.lenovomm.com/developer/tabletboot/ [your sn number]/sn.img
    or follow the steps of this other guide (it worked for me): https://forum.xda-developers.com/t/...t-proper-unlock-file-xiaoxin-pad-pro-2021-tb- j716f.4488343/#post-87420075
    1.2 After getting the sn.img file, just perform step 8 of this tutorial.
    2 - Now you install the original ROM
    3- Manually update until version 13.1.560
    4 - And now you can crash Bootloader again.

    Extra Tips: - Before starting the lockout procedure I made sure the Lenovo drivers were installed and uninstalled the Qualcomm Drivers. - After starting the lock procedure, when I got to the lock screen I removed the usb cable from the tablet and selected to lock it.
    2
    I was able to lock my bootloader using the 13.1.560
    it`s 22/11/2022 19:09
    Thank you all for your helps.
    1
    Em algum momento, lendo muito, descobri que espectro de 5ghz está reservado para a China. Não sei como isso afeta a conexão de banda de rede com o gerenciamento do dispositivo de localização e o dispositivo fora da China. 5ghz funcionam na versão 13.1.560. Aqui não há atualização OTA para fazer, e eu não vou mexer com o sistema de arquivos novamente. Apenas OTA
    Você atualizou o ZUI via atualização do sistema de arquivos ou OTA? Bloquear ou desbloquear o Bootloader?
    Em algum momento, lendo muito, descobri que espectro de 5ghz está reservado para a China. Não sei como isso afeta a conexão de banda de rede com o gerenciamento do dispositivo de localização e o dispositivo fora da China. 5ghz funcionam na versão 13.1.560. Aqui não há atualização OTA para fazer, e eu não vou mexer com o sistema de arquivos novamente. Apenas OTA
    Você atualizou o ZUI via atualização do sistema de arquivos ou OTA? Bloquear ou desbloquear o Bootloader?
    The zui 14 has two updates, the first I did manually and the second via ota. But to do this via ota you need to use Chinese VPN. But people who are on ZUI 13 can now upgrade to ZUI 14 with android 12 directly via ota with chinese VPN
    1
    still unlocked? If yes, install the stock rom +updates again and then lock .
    Confirmed activation tablet locking on version 13.1.560 and no OTA updates to do.
    Already relocked and upgraded to zui14
  • 10
    Install Lenovo Xiaoxin P11 Pro 2021 Original ROM (TB-J716F)

    !!! ATTENTION !!!
    WITH THE GUIDE YOU WILL LOSE ALL THE DATA ON YOUR DEVICE!
    AFTER INSTALLATION, THE APPLIANCE WILL ONLY HAVE THE LANGUAGE (ENGLISH AND CHINESE).

    I AM NOT RESPONSIBLE FOR ANY DAMAGE CAUSED TO THE DEVICE, USE AT YOUR OWN RISK.

    The following requirements must be met:

    * Unlocked Bootloader;
    * Device with charged battery;
    * USB cable working and of good quality (preferably the original cable of the device);
    * Remove all devices connected to the computer's USB port to avoid failures;
    * Download "Original ROM":
    https://mirrors.lolinet.com/firmware/lenovo/Tab_P11_Pro_2021/TB-J716F/
    * Download "QPST Tool (QFIL + Drivers)" (Tool to install Qualcomm ROM and Drivers):
    https://qpsttool.com/qpst-tool-v2-7-496
    * Download "Platform Tools SDK" (Command Line Tool):
    https://developer.android.com/studio/releases/platform-tools
    * Package without "ROM"
    https://www.mediafire.com/file/goysykd3syfwzuz/Lenovo_Xiaoxin_P11_Pro_2021_(TB-J716F).zip/file

    Installation:

    1. Extract the "Original ROM"

    * Create a folder on the desktop called "ROM"
    * Extract the "Original ROM" inside the "ROM" folder created;

    2. Install the "QPST Tool (QFIL + Drivers)" and Qualcomm USB Drivers:
    * Extract the "QPST Tool (QFIL + Drivers)" on the desktop,
    * Install "QPST Tool.exe";
    * Enter the "Driver" folder and install Qualcomm USB Drivers.

    3. Enable Tablet USB Debugging "USB Debugging":
    * Open the device's "Settings" settings;
    * Go to My Device "My Device" and tap "ZUI Version" several times until enable "Developer Options" developer setting;
    * Go back to Settings "Settings" and go to General Settings "General Settings";
    * Select the Developer Settings "Developer Options";
    * Check the USB Debugging box "USB Debugging";

    4. Start the Tablet in EDL Mode (Emergency Download Mode):

    In EDL Mode the device screen remains off!
    There are two ways to put the Tablet into EDL mode "Emergency Mode" (Choose only one "Mode")


    Mode1 (For Tablet powered off or unable to start)
    * Turn off the Tablet;
    * Press and hold the Volume Up (+) button;
    * Connect USB cable to Tablet and computer.

    Mode2 (By Command Line using "Platform Tools SDK")
    * Turn on and start the Tablet;
    * Connect USB cable to Tablet and computer.
    * Extract the "Platform Tools SDK" on the desktop;
    * Open the computer's CMD and navigate to the extracted folder (platform-tools);
    * Use the adb command "adb reboot edl";
    * Wait for the device to restart in EDL mode.

    5. This should now appear in the Windows device manager:

    Foto01.png


    6. Configuration of the "QPST Tool (QFIL)":
    * Start QFIL;
    * The device port must be automatically recognized by QFIL (make sure the port is correct);
    * Make the settings shown in the screenshot;
    “Configuration” -> “FireHose Configuration” and set ufs in “device type” and click “Reset After Download” and press OK;

    Foto2.png


    * In the main window of QFIL in "Select Programmer", press the button "Browse" (If the button is not accessible, continue the guide that when choosing "content.xml" QFIL will automatically choose the file "prog_firehose_ddr.elf")
    Navigate to the "ROM" folder on the desktop, select the "prog_firehose_ddr.elf" file;
    * In the QFIL main window under "Select Meta Build" and "Content XML", press the "Load Content" button;
    Navigate to the "ROM" folder on the desktop, and select the "contents.xml" file

    Foto3.png


    * Now click on Download Content "Download Content" and wait;
    * The process takes about 2-5 minutes and your tablet will restart with "Original ROM".

    Foto4.jpg


    7. Blocking the "Bootloader" (OPTIONAL)

    Bootloader blocking is optional!
    After Bootloader lock your Tablet will receive OTA and Widevine L1 updates for high resolution media!


    The following requirements must be met:


    * Enable USB Debugging "USB Debugging" in the "Developer Options" developer options (see step 3. of this guide);
    * Download and install Lenovo USB drivers (LenovoUsbDriver):
    https://www.mediafire.com/file/1bzfblquyofokgi/LenovoUsbDriver_v1.1.34.zip/file
    * Download this tool (LockUnlockBootloader):
    https://www.mediafire.com/file/51352hr83iz87g5/LockUnlockBootloader.zip/file

    7.1
    * Start your tablet normally on Android and connect to PC by USB cable;
    * Extract the "LockUnlockBootloader.zip" file on the desktop;
    * Enter the extracted "LockUnlockBootloader" folder and open the "LockBootloader.bat" batch file;
    * On the CMD screen, press “Enter” and then “1” and confirm again.

    LockBootloader1.jpg


    * On your Tablet will ask if you want to lock the bootloader;
    * Select with the “Volume Up(+) / Down(-) Buttons” and confirm with the “Power Button(Power)”.

    LockBootloader2.jpg


    Okay, your bootloader is now locked.

    7.2 Bootloader Locking Problems

    Only for those who are getting "Your device is corrupted" message.


    To solve this you have to manually update to the latest version ZUI 13 before locking the bootloader again.
    Follow the tutorial again with the "Original ROM" and follow these steps:

    The process for updating manually is the following:
    All updates must be installed in order from smallest to largest and all must be renamed to "update.zip"


    1) Download the update;

    2) Use a file explorer and move it to the root folder of your device;

    3) Rename it to "update.zip"

    4) Got to Settings => System Update => "Select the 3 dots top right and select 'Use the install package update'

    Repeat these steps for each individual update

    The order of updates are:
    1) Stock ROM version (Chinês / Inglês)
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_12.6.211_ST_210730_qpst

    2) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_12.6.238_ST_210824
    to
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.346_ST_211108.zip
    https://mega.nz/file/4h13DI4R#09imnGFk0c16CPNG635AYIClewuF5rXkiaj3xqGmjA8

    3) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.346_ST_211108
    to
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.364_ST_211115.zip
    https://mega.nz/file/l5ljWChS#rL44OM0-PuIFGZWSwr46pJr5S8NcY0JuYH7ctEeVTNs

    4) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.364_ST_211115
    to
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZU...zip
    https://forum.xda-developers.com/at...j716f_cn_open_user_q00209-3_r_zu-zip.5522973/

    5) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.430_ST_220113
    to
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZU...zip
    https://forum.xda-developers.com/at...j716f_cn_open_user_q00209-3_r_zu-zip.5598667/

    So the version you need to be running before attempting to lock the bootloader is 13.1.555 so double check your version in Settings => My Device

    Once you have done that you will have the Bootloader locked.

    *Note this procedure works as of 25/5/22, it may change if there's a new update.

    Credits to our friend "Rail-"

    8. Unlock the "Bootloader" (OPTIONAL)

    Bootloader unlocking is optional!
    Only unlock if you intend to install "Custom ROM" or "ROOT" the device.

    Before downgrading, make sure your current ROM is compatible!

    The following requirements must be met:

    * Enable USB Debugging "USB Debugging" and OEM Unlocking "OEM Unlocking" in developer options "Developer Options" (see step 3. of this guide);
    * Download and install Lenovo "LenovoUsbDriver" USB drivers:
    https://www.mediafire.com/file/1bzfblquyofokgi/LenovoUsbDriver_v1.1.34.zip/file
    * Download this "LockUnlockBootloader" tool:
    https://www.mediafire.com/file/51352hr83iz87g5/LockUnlockBootloader.zip/file
    * Request "Bootloader" Unlock Image (sn.img) on Lenovo website:
    https://www.zui.com/iunlock

    Foto UnlockBootloader4.png


    It is necessary to inform the device's Serial Number and a valid Email to receive the file. The Serial Number can be obtained on the device box, on the label on the back of the device and on Android in Settings "Settings" -> My Device "My Device" -> Status "Status" -> Serial Number "Serial Number";


    8.1

    * Now you place the file directly in the “LockUnlockBootloader” program folder;
    * Start the process with the batch file “UnlockBootloader.bat”;

    Foto UnlockBootloader5.png


    * Done, now your bootloader is unlocked and you can install custom ROMs on your Xiaoxin Pad Pro 2021 (TB-J716F).

    Foto UnlockBootloader6.png


    Source and Links used for this guide.





    THANK YOU SO MUCH TO THE COLLABORATORS!


    ******************************************************************************************
    ******************************************************************************************
    Sem título.png
    VERSÃO ORIGINAL DO GUIA EM PORTUGUÊS (BR)
    Sem título.png
    ******************************************************************************************
    ******************************************************************************************

    Instale uma ROM original Lenovo Xiaoxin P11 Pro 2021 (TB-J716F)

    !!! ATENÇÂO!!!
    COM O GUIA VOCÊ PERDERÁ TODOS OS DADOS DO SEU APARELHO!
    APÓS A INSTALAÇÃO, O APARELHO VAI POSSUIR SOMENTE O IDIOMA (INGLÊS E CHINÊS).
    NÃO SOU RESPONSÁVEL POR QUALQUER DANO CAUSADO NO APARELHO, USE POR SUA CONTA E RISCO.


    Os seguintes requisitos devem ser atendidos:

    * Bootloader Desbloqueado;
    * Aparelho com bateria carregada;
    * Cabo USB funcionando e de boa qualidade (de preferência o cabo original do aparelho);
    * Retire todos os aparelhos conectados na porta USB do computador para evitar falhas;
    * Baixe "ROM Original":
    https://mirrors.lolinet.com/firmware/lenovo/Tab_P11_Pro_2021/TB-J716F/
    * Baixe o "QPST Tool (QFIL + Drivers)" (Ferramenta para instalar a ROM e Drivers da Qualcomm):
    https://qpsttool.com/qpst-tool-v2-7-496
    * Baixe o "SDK Plataform Tools" (Ferramenta para linha de comando):
    https://developer.android.com/studio/releases/platform-tools
    * Pacote sem "ROM"
    https://www.mediafire.com/file/goysykd3syfwzuz/Lenovo_Xiaoxin_P11_Pro_2021_%28TB-J716F%29.zip/file

    Instalação:

    1. Extraia a "ROM Original"
    * Crie uma pasta na área de trabalho chamada "ROM"
    * Extraia a "ROM Original" dentro da pasta "ROM" criada;

    2. Instalando o "QPST Tool (QFIL + Drivers)" e os Drivers USB da Qualcomm:
    * Extraia o "QPST Tool (QFIL + Drivers)" na área de trabalho,
    * Instale o "QPST Tool.exe";
    * Entre na pasta "Driver" e faça a instalação dos Drivers USB da Qualcomm.

    3. Ative a Depuração USB "USB Debugging" do Tablet:
    * Abra as configurações "Settings" do aparelho;
    * Vá para o Meu Dispositivo "My Device" e toque na "ZUI Version" várias vezes até abilitar a configuração de desenvolvedor "Developer Options";
    * Volte para Configurações "Settings" e vá para Configurações Gerais "General Settings";
    * Selecione a Cofiguração de Desenvolvedor "Developer Options";
    * Marque a caixa de Depuração USB "USB Debugging";

    4. Iniciar o Tablet no Modo EDL (Modo de Download de Emergência):

    No Modo EDL a tela do aparelho permanece desligada!
    Existe duas maneiras de colocar o Tablet no modo EDL "Modo de Emergência" (Escolha apenas um "Modo")

    Modo1 (Para Tablet desligado ou que não puder ser iniciado)
    * Desligue o Tablet;
    * Pressione e segure o botão Volume Cima (+);
    * Conecte o cabo USB no Tablet e no computador.

    Modo2 (Por Linha de Comando utilizando o "SDK Plataform Tools")
    * Ligue e inicie o Tablet;
    * Conecte o cabo USB no Tablet e no computador.
    * Extraia o "SDK Plataform Tools" na área de trabalho;
    * Abra o CMD do computador e navegue até a pasta extraida (platform-tools);
    * Use o comando adb "adb reboot edl";
    * Espere o aparelho reiniciar no modo EDL.

    5. Agora isso deve aparecer no gerenciador de dispositivos do Windows:

    Foto01.png


    6. Configuração do "QPST Tool (QFIL)":
    * Inicie o QFIL;
    * A porta do aparelho deve ser reconhecida automaticamente pelo QFIL (certifique-se que a porta está correta);
    * Faça as configurações mostradas na captura de tela;
    “Configuration” -> “FireHose Configuration” e defina ufs em “device type” e clique em “Reset After Download” e aperte OK;

    Foto2.png


    * Na janela principal do QFIL em "Select Programmer", aperte o botão "Browse" (Se o botão não estiver acessível, continue o guia que ao escolher o "content.xml" o QFIL escolherá automaticamente o arquivo "prog_firehose_ddr.elf");
    Navegue até a pasta "ROM" no desktop, selecione o arquivo "prog_firehose_ddr.elf";
    * Na janela principal do QFIL em "Select Meta Build" e "Content XML", aperte o botão "Load Content";
    Navegue até a pasta "ROM" no desktop, e selecione o arquivo "contents.xml"

    Foto3.png


    * Agora clique em Baixar Conteúdo "Download Content" e aguarde;
    * O processo leva cerca de 2 a 5 minutos e seu tablet será reiniciado com a "ROM Original".

    Foto4.jpg


    7. Bloqueio do "Bootloader" (OPCIONAL)

    O bloqueio do Bootloader é opcional!
    Após o bloqueio do Bootloader seu Tablet receberá atualizações OTA e Widevine L1 para medias de alta resolução!

    Os seguintes requisitos devem ser atendidos:

    * Ative a Depuração USB "USB Debugging" nas opções do desenvolvedor "Developer Options" (veja o passo 3. deste guia);
    * Baixe e instale os drivers USB Lenovo (LenovoUsbDriver):
    https://www.mediafire.com/file/1bzfblquyofokgi/LenovoUsbDriver_v1.1.34.zip/file
    * Baixe esta ferramenta (LockUnlockBootloader):
    https://www.mediafire.com/file/51352hr83iz87g5/LockUnlockBootloader.zip/file

    7.1
    * Inicie seu tablet normalmente no Android e conecte ao PC pelo cabo USB;
    * Extraia o arquivo "LockUnlockBootloader.zip" na área de trabalho;
    * Entre na pasta "LockUnlockBootloader" extraida e abra o arquivo de lote "LockBootloader.bat";
    * Na tela do CMD aperte “Enter” e depois “1” e confirme novamente.

    LockBootloader1.png


    * No seu Tablet vai perguntar se você deseja bloquear o bootloader;
    * Selecione com os “Botões Aumentar(+) / Diminuir Volume(-)” e confirme com o “Botão Liga/Desliga(Power)”.

    LockBootloader2.jpg


    Pronto, seu bootloader já está bloqueado.

    7.2 Problemas de bloqueio do "BootLoader"

    Apenas para aqueles que estão recebendo a mensagem "Seu dispositivo está corrompido"


    Para resolver isso, você deve atualizar manualmente para a versão mais recente do ZUI 13 antes de bloquear o bootloader novamente.
    Siga o tutorial novamente com a "ROM Original" e siga estes passos:

    O processo de atualização manual é o seguinte:
    Todas as atualizações devem ser instaladas na ordem do menor para o maior e todas devem ser renomeadas para "update.zip"

    1) Baixe a atualização;

    2) Use um explorador de arquivos e mova-o para a pasta raiz do seu aparelho;

    3) Renomeie para "update.zip"

    4) Acesse Configurações "Settings" => Atualização do Sistema "System Update" => "Selecione os 3 pontos no canto superior direito e escolha o arquivo"

    Repita essas etapas para cada atualização individual

    A ordem das atualizações é:

    1) ROM Original versão (Chinês / Inglês)
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_12.6.211_ST_210730_qpst

    2) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_12.6.238_ST_210824
    para
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.346_ST_211108.zip
    https://mega.nz/file/4h13DI4R#09imnGFk0c16CPNG635AYIClewuF5rXkiaj3xqGmjA8

    3) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.346_ST_211108
    para
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.364_ST_211115.zip
    https://mega.nz/file/l5ljWChS#rL44OM0-PuIFGZWSwr46pJr5S8NcY0JuYH7ctEeVTNs

    4) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.364_ST_211115
    para
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZU...zip
    https://forum.xda-developers.com/at...j716f_cn_open_user_q00209-3_r_zu-zip.5522973/

    5) TB-J716F_CN_OPEN_USER_Q00209.3_R_ZUI_13.0.430_ST_220113
    para
    TB-J716F_CN_OPEN_USER_Q00209.3_R_ZU...zip
    https://forum.xda-developers.com/at...j716f_cn_open_user_q00209-3_r_zu-zip.5598667/

    Portanto, a versão que você precisa estar executando antes de tentar bloquear o bootloader é 13.1.555, então verifique sua versão nas configurações "Settings" => Meu Dispoditivo "My Device"

    Feito isso, você terá o Bootloader bloqueado.

    *Observe que este procedimento funciona a partir de 25/5/22, pode ser alterado se houver uma nova atualização.

    Créditos ao nosso amigo "Rail-"

    8. Desbloquear o "Bootloader" (OPCIONAL)

    O desbloqueio do Bootloader é opcional!
    Só faça o desbloqueio se você pretende instalar "Custom ROM" ou fazer "ROOT" no aparelho.
    Antes de realizar um downgrade, tenha certeza que sua ROM atual é compativel !

    Os seguintes requisitos devem ser atendidos:

    * Ative a Depuração USB "USB Debugging" e o Desbloqueio OEM "OEM Unlocking" nas opções do desenvolvedor "Developer Options" (veja o passo 3. deste guia);
    * Baixe e instale os drivers USB Lenovo"LenovoUsbDriver":
    https://www.mediafire.com/file/1bzfblquyofokgi/LenovoUsbDriver_v1.1.34.zip/file
    * Baixe esta ferramenta "LockUnlockBootloader":
    https://www.mediafire.com/file/51352hr83iz87g5/LockUnlockBootloader.zip/file
    * Solicite a Imagem de Desbloqueio do "Bootloader" (sn.img) no site da Lenovo:
    https://www.zui.com/iunlock

    Foto UnlockBootloader4.png


    É necessário informar o Número de Série do aparelho e um Email válido para receber o arquivo. O Número de Série pode ser obtido na caixa do aparelho, na etiqueta atrás do aparelho e no Android nas Configurações "Settings" -> Meu Dispositivo "My Device" -> Status "Status" -> Número de Série "Serial Number";


    8.1

    * Agora você coloca o arquivo diretamente na pasta do programa “LockUnlockBootloader”;
    * Inicie o processo com o arquivo de lote “UnlockBootloader.bat”;

    Foto UnlockBootloader5.png


    * Pronto, agora seu bootloader está desbloqueado e você pode instalar ROMs personalizadas no seu Xiaoxin Pad Pro 2021 (TB-J716F).

    Foto UnlockBootloader6.png



    Fonte e Links utilizados para esse guia.





    MUITO OBRIGADO AOS COLABORADORES!
    3
    Como vc conseguiu instalar a versão 13.1.560? Eu estou na 13.1.555 ST e não consigo para poder bloquear o bootloader.
    2
    I was able to lock my bootloader using the 13.1.560
    it`s 22/11/2022 19:09
    Thank you all for your helps.
    2
    Guys,

    I bought the tablet with a global ROM and I tried to restore to the original ROM. I could restore but then I tried to lock the bootloader (to receive OTA updates) and I'm stuck at the fastboot mode.

    I tried to reflash the original ROM but when the tablet is rebooted after the reflashing it came back to the fastboot mode and it is in a loop.

    I'm desperate because it seems a bricked tablet.

    Can you help me?

    Thank you!
    2
    Muito obrigado, fiquei procurando nas mensagens mas não tava achando. Valeu mesmo!