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

[Czar Augusto]

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 !

I am waiting for 6 days and still nothing

 

[geraldmany]

HI! i got a mi 11 pro 1 year ago, and it was offically chinese, but it came unlocked with Xiaomi.eu firmware, but i could't update it via the updater app, so i searched and found the global star version and just flashed it, everything worked, only now google pay nfc didnt work, it said that its probably because of the unlocked bootloader, so i got to fastboot and in cmd i sent fastboot oem lock, and since then my phone is stuck in miui recovery 5.0 screen and says that i cannot run this firmware on the device, i tried to unlock it but failed, maybe after a week, but i think that i didnt turn on oem unlocking on the phone itself before this... So im just hoping that after a week unlocking could be done... Or my other idea is, that i could install the original chinese rom with sideload, because i managed to install another global version on it since, but the result is still the same, the only problem is that i cannot find literally anywhere a mars codenamed firmware...

Anyone who might have the same situation, i found a simple, but effective solution, not sure if it works on every xiaomi device, but i will write down the steps here:
You need to use XiaomiADB, here is the download link and the description for how to use it -> https://xiaomiui.net/how-to-use-xiaomiadb-8044/ (if the page is not available, then feel free to msg me!)

For xiaomi adb, you need to go to 3rd option on the miui recovery screen, NOT THE FASTBOOT

So basically i went through the steps to “xiaomiadb sideload_miui <filename>”
And I tried to install a rom, BUT IT DIDNT ACCEPT IT!
The message was:
ERROR: This rom cannot be installed, server code -> 2001, server message -> Can't install unofficial rom
after trying 4 times all the same and: Installation of this rom via stock recovery is not allowed by Xiaomi
Says Installation failed, and then i just decided to download another rom so i PLUGGED OUT THE PHONE right after this, and went to another room to connect to wired network, to download and try a different rom... when i came back, to all my surprise, the phone was turned on, so i went to the setting dev ops and enabled bootloader unlocking, linked it to my account enabled adb and everything that is needed to flash another rom later, so then i rebooted and again, miui recovery 5.0 screen, but now i enabled unlocking, so i put the phone in fastboot, and tried MI UNLOCKER TOOL again, now it says: Please unlock 168 hours later. And do not add your account in MIUI again, otherwise you will wait from scratch.

So that means, after 7 days i wll be able to unlock it, until then, i can turn it on with the above method, in short try to sideload (copy and install) a rom to it, and then after it failed, plug it out and just wait like 10-20 maybe 30 seconds and bam your device is normally booted... I hope it helps to some of you, (i have been searching for the solution for almost a week, my other option was to pay someone who can MAYBE do it or send the phone back to china and pay the repairs, so im really happy with this method! If it helps to you, please reply so i and the others will know that it worked! Have a nice day!

 

[devexa]

Anyone who might have the same situation, i found a simple, but effective solution, not sure if it works on every xiaomi device, but i will write down the steps here:
You need to use XiaomiADB, here is the download link and the description for how to use it -> https://xiaomiui.net/how-to-use-xiaomiadb-8044/ (if the page is not available, then feel free to msg me!)

For xiaomi adb, you need to go to 3rd option on the miui recovery screen, NOT THE FASTBOOT

So basically i went through the steps to “xiaomiadb sideload_miui <filename>”
And I tried to install a rom, BUT IT DIDNT ACCEPT IT!
The message was:
ERROR: This rom cannot be installed, server code -> 2001, server message -> Can't install unofficial rom
after trying 4 times all the same and: Installation of this rom via stock recovery is not allowed by Xiaomi
Says Installation failed, and then i just decided to download another rom so i PLUGGED OUT THE PHONE right after this, and went to another room to connect to wired network, to download and try a different rom... when i came back, to all my surprise, the phone was turned on, so i went to the setting dev ops and enabled bootloader unlocking, linked it to my account enabled adb and everything that is needed to flash another rom later, so then i rebooted and again, miui recovery 5.0 screen, but now i enabled unlocking, so i put the phone in fastboot, and tried MI UNLOCKER TOOL again, now it says: Please unlock 168 hours later. And do not add your account in MIUI again, otherwise you will wait from scratch.

So that means, after 7 days i wll be able to unlock it, until then, i can turn it on with the above method, in short try to sideload (copy and install) a rom to it, and then after it failed, plug it out and just wait like 10-20 maybe 30 seconds and bam your device is normally booted... I hope it helps to some of you, (i have been searching for the solution for almost a week, my other option was to pay someone who can MAYBE do it or send the phone back to china and pay the repairs, so im really happy with this method! If it helps to you, please reply so i and the others will know that it worked! Have a nice day!

My friend this is a Lenovo Xiaoxin section and thread not Xiaomi

 

[kudo2702]

I'll send to your pm.

Can you hep me get sn.img serial number HA1C00X

 

[cyclonemon]

Can you hep me get sn.img serial number HA1C00X

Now Function maintenance
If you want to unlock the device, please send detailed requirements (unlock purpose, device serial number, etc.) to [email protected]. The staff will contact you within 3~5 working days.

 

[kudo2702]

Now Function maintenance
If you want to unlock the device, please send detailed requirements (unlock purpose, device serial number, etc.) to [email protected]. The staff will contact you within 3~5 working days.

I send mail already and waiting

 

[devexa]

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 !!!

 

[JhonyJordan]

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

View attachment 5432885

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​

No passo "2. Go to Developer Settings and enable "USB Debugging" and "OEM Unlocking"." se você estiver com o OEM Locked, para desbloquear você deve usar o comando fastboot flash unlock sn.img e depois o fastboot oem unlock-go.

 

[darrel_xda]

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 !!!
View attachment 5806249

What Zui version are you on right now?

 

[Joao38]

Em qual versão do Zui você está agora?

Was it able to unlock the bootloader? I'm on ZUI 14 and I'm not able to unlock

 

[darrel_xda]

Was it able to unlock the bootloader? I'm on ZUI 14 and I'm not able to unlock.

Was it able to unlock the bootloader? I'm on ZUI 14 and I'm not able to unlock

Not yet.

 

[Kwawarmah]

Hello friends, I managed to unlock bootloader using HAHAHAHA method but substituted with original SN because I have my SN.img file. I later flashed it with stock rom but still not able to boot to home screen any help?

 

[Kwawarmah]

My original SN on the device is HA1MK6GA which I have the SN.img file but after locking it changed to 4021d694 using HAHAHAHA method I was able to unlock it with the original SN.img by changing HAHAHA with HA1MK6GA am still not able to boot to android home after flashing with stock rom any help please

 

[seanlano]

I am trying to use the ZUI website (https://www.zui.com/iunlock) to get the sn.img file for my tablet, but it keeps saying "The number of unlocks today has reached the limit, come back tomorrow!" (original: 今日解锁数量已达限额，明天再来吧)

I've tried several days in a row now, it always says the same thing. Is the website working still? I tried the e-mail from above ([email protected]) and it just bounces back.

Also the trick of http://cdn.zui.lenovomm.com/developer/tabletboot/[your sn number]/sn.img doesn't seem to work, I get a 404 error.