How To Guide Lock+Unlock Bootloader - Xiaoxin Pad Pro 2021 [TB-J716F]

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AndrewGr

Member
Nov 14, 2022
6
0
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
 

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fleps

Member
Dec 9, 2010
11
2
Nov 20, 2022
9
1
Como bloquear e desbloquear o bootloader - Xioaxin Pad Pro 2021 - TB-J716F

Desde que descobri que o Tablet suporta o Project Treble, estou tentando instalar um GSI-ROM nele.
Atualmente, com muitas tentativas e erros, consegui o LiR-ROM para inicializar.
O primeiro passo é desbloquear o Bootloader, então pensei em compartilhar o processo aqui.
Seus dados serão excluídos durante o desbloqueio, tente por sua conta e risco.

Desbloquear Bootloader manualmente
Requisito: PC com ADB Fastboot
1. Vá para Configurações -> Sistema -> Sobre o telefone, clique nele até que as configurações do desenvolvedor sejam ativadas.
2. Vá para Configurações do desenvolvedor e habilite "Depuração USB" e "Desbloqueio OEM".
3. Abra o console e digite "dispositivos adb". Permita a depuração USB se os tablets solicitarem.
4. Digite o comando "adb reboot bootloader".
5. Anote o número de série mostrado na tela do bootloader
Você pode obter a imagem de desbloqueio por meio deste link " http://cdn.zui.lenovomm.com/developer/tabletboot/[seu número sn]/sn.img" ou pelo site
5. Acesse o site ZUI Unlock e solicite a imagem de desbloqueio

View attachment 5432885

6. Você deve receber um e-mail onde você pode baixar um arquivo chamado "sn.img".
7. Faça o flash da imagem com fastboot "fastboot flash unlock sn.img"
8. Digite o comando "fastboot oem unlock-go", o bootloader será desbloqueado agora.
9. Reinicie com "reinicialização de inicialização rápida".
Pronto, seu bootloader deve estar desbloqueado agora.

Bloquear e Desbloquear Bootloader com Batchscript
Recentemente, encontrei um script em lote para dispositivos lenovo em um fórum chinês e o traduzi.
É fácil e conveniente de usar. Para desbloquear você ainda precisa do sn.img do site ZUI Unlock .
Baixar BatchScript
Me ajudou muito, obrigado de coração.
Fico feliz em saber que não sei nada e que tem gente que sabe e compartilha.
Meu problema foi que o tablet ficou em bootloop quando coloquei a stock rom e bloqueei o bootloader em seguida. Isso causa o erro que o tablet não iniciou mais...
Esse tutorial ajudou muito também a entender o que se passou. Mas no fim eu já tinha tudo que precisava, só faltava a imagem verdadeira com 6kb do tablet TB-J716F. As sn.img que eu tinha não funcionavam. E o site da ZUI não está mais disponibilizando a imagem para o tablet. Se não fosse o seu link para colocar o número de série eu não tinha conseguido.

Enfim, agradeço a todos do fórum XDA por ter me falado quando eu não sabia absolutamente nada a respeito do tema.
obrigado de coração !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

geraldmany

Member
Dec 9, 2022
14
0
Hi! I have the same issue on my Xiaomi Mi 11 Pro (It was Chinese) but it came unlocked with xiaomi.eu rom.
After i installed a global rom, and google wallet nfc pay did not work, so i thought okay i will lock it then so maybe wallet would accept it, (with the eu rom it worked before) so i put the device in fastboot and used fastboot oem lock on cmd...

And from then it stucks on miui recovery 5.0 screen, and says, this miui version can't be installed on this device...

I might not enabled oem unlocking before i shut if off, but i added it to my mi account so i dont know if after a week i can maybe unlock it. But i think the other possible solution would be to sideload the original chinese stock rom, which is for M2102K1AC, Mi 11 pro, codename mars, but i couldn't find it anywhere... If someone can upload a link to it, that would be a huge help! Or any idea! thx!
 

Czar Augusto

Member
Dec 10, 2022
17
1
Hello guys, i am having the same problem
I locked the bootloader and now I don’t know what to do. The site https://www.zui.com/iunlock is do not working anymore i am waiting several days for the sn.img… Please someone give to my email the sn.img the SN is HA1M4L63 i am desperate, i also tried to put my sn in the link and appears the error 404
 

huracancun

Member
Nov 22, 2017
5
0
Hello, i suffered the same problem and the solution is this:

You need to do everything in the post. Easy, my friend :)
 

Czar Augusto

Member
Dec 10, 2022
17
1
Hello, i suffered the same problem and the solution is this:

You need to do everything in the post. Easy, my friend :)
I tried to do everything but now I'm stuck, I managed to change the fpinfo and frp files but when I enter adb a message appears saying that there are no devices.. and now I can no longer reverse the process of my serial number because of the error that appears.. If you know what can i do tell me please
1.jpg
2.jpg
ec8cbd0b-a1fc-4dab-ab4a-d35d9a657b6a.jpg
 

ferreol-fr

Senior Member
I tried to do everything but now I'm stuck, I managed to change the fpinfo and frp files but when I enter adb a message appears saying that there are no devices.. and now I can no longer reverse the process of my serial number because of the error that appears.. If you know what can i do tell me pleaseView attachment 5782159View attachment 5782161View attachment 5782163
If you can try another computer or at least another USB controller.
 

Czar Augusto

Member
Dec 10, 2022
17
1

ferreol-fr

Senior Member
I know but i need the sn.img this link does the error 404 http://cdn.zui.lenovomm.com/developer/tabletboot/HA1M4L63/sn.img and the site https://www.zui.com/iunlock is in maintence, i tried this way https://forum.xda-developers.com/t/...k-file-xiaoxin-pad-pro-2021-tb-j716f.4488343/ but got no success, i stuck on the step 13 and my device did not appears when i use the commands of the 14-15View attachment 5782899View attachment 5782901
So, read here :coffee:
 

ferreol-fr

Senior Member
I tried to do everything but now I'm stuck, I managed to change the fpinfo and frp files but when I enter adb a message appears saying that there are no devices.. and now I can no longer reverse the process of my serial number because of the error that appears.. If you know what can i do tell me please
If you have changed your SN to HAHAHAHA your sn.img is http://cdn.zui.lenovomm.com/developer/tabletboot/HAHAHAHA/sn.img
Like indicated !
 

Czar Augusto

Member
Dec 10, 2022
17
1
If you have changed your SN to HAHAHAHA your sn.img is http://cdn.zui.lenovomm.com/developer/tabletboot/HAHAHAHA/sn.img
Like indicated !
I should try with the oldest original chinese rom or the last one that was put on it when it became locked?


Because I already tried all the ways and when I change my SN to HAHAHAHA and execute the commands 14. fastboot flash unlock sn.img 15. fastboot oem unlock-go "waiting for device" appears in unlockbootloader
 

devexa

Member
Jan 29, 2016
10
5
Hello everyone,
I tried to get my unlock file, but I got the Error 404 using the link provided by OP. I've emailed [email protected] 3 days ago but got no response...
Is there any way to get the unlock file ?
I don't want to refer to HAHAHAHA method just in case it gets patched. This, is why it is important to me to have my unlock file.
My bootloader is already unlocked, and I want to lock it back to get L1 certificate back, but before doing that I need to have my unlock file just in case something goes wrong.
My SN is : HA1Q1YNF
Thanks in advance :) !
 

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  • 2
    Hello everyone,
    It seems that in their desktop version they reactivated the unlocker for Lenovo Tablets. What do you please put in the field beside the number '6831' in the picture attached ? Thanks in advance !
    Nevermind ... The numbers you have to put in the field are those written besides it (In that case 6831), and, to ungray the button you have to be signed in.
    I signed in using my EU Lenovo account and it worked. Now when I go to this url : http://cdn.zui.lenovomm.com/developer/tabletboot/[your sn number]/sn.img it downloads my sn.img ! Hurray I have finally my bootloader unlock file !!!
    1673302872084.png
  • 16
    How To Lock and Unlock Bootloader - Xioaxin Pad Pro 2021 - TB-J716F

    Since I found out that the Tablet supports Project Treble I'm trying to get a GSI-ROM running on it.
    Currently with many trial and error I got LiR-ROM to boot.
    The first step is to unlock the Bootloader so I thought I will share the process here.
    Your data will be deleted while unlocking, try it at your own risk.

    Unlock Bootloader manually
    Requirement: PC with ADB Fastboot
    1. Go to Settings -> System -> About Phone, tab on it until developer settings are enabled.
    2. Go to Developer Settings and enable "USB Debugging" and "OEM Unlocking".
    3. Open Console and enter "adb devices". Allow USB-Debugging if tablets asks.
    4. Enter command "adb reboot bootloader".
    5. Write down the serial number shown on the bootloader screen
    You can either get the unlock image via this link "http://cdn.zui.lenovomm.com/developer/tabletboot/[your sn number]/sn.img" or via the webseite
    5. Go to the ZUI Unlock Website and request the unlock image

    ZUIUnlock.png


    6. You should get a mail where you can download a file called "sn.img".
    7. Flash the image with fastboot "fastboot flash unlock sn.img"
    8. Enter command "fastboot oem unlock-go", bootloader will unlock now.
    9. Restart with "fastboot reboot".
    Done, your bootloader should be unlocked now.

    Lock and Unlock Bootloader with Batchscript
    I recently found a batch script for lenovo devices in an chinese forum and translated it.
    It's easy and convenient to use. For unlocking you still need the sn.img from the ZUI Unlock Website.
    Download BatchScript
    4
    update : I've found a way! thanks to a korean lad that led me to a russian forum
    HERE
    4
    Hello to everyone, can someone post the exact steps on how to lock the bootloader?
    Thanks
    You need to be on official Chinese ROM first. @Tropaion made a tutorial on how to flash it.
    For locking the bootloader you need to enable USB debugging in developer settings.
    Then plug in the tablet to your PC, open adb shell and type "adb reboot bootloader"
    After it's rebooted to the bootloader type "fastboot flashing lock"
    Then you're done and can reboot.

    Few things to keep in mind: never unplug the tablet when flashing ROMs. Also the locking bootloader command doesn't always work and you might have to try a few times or switch between fastboot and bootloader.

    Hope this helps, there are also a few topics on locking/unlocking if you're stuck.
    4
    @sakun-ice I got LineageOS to run on it today, but it still has 2-3 bugs.
    4
    Thanks @zxcv88

    After installing the lenovo USB driver, the !Android in Other devices was updated.

    Boot into bootloader mode and "fastboot flashing lock" runs without any issue

    Appreciate all for the advise and help! Appreciate ~