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Vivo X21 UD How to Unlock bootloader

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better1

Member
Mar 13, 2011
14
1
Hi

Does anyone know how to unlock the bootloader for the amazing Vivo X21 UD ?

I tried those methods :
Fastboot OEM unlock
Fastboot bbk unlock_vivo (with a modified fastboot binary I found on XDA)
fastboot vivo_bsp unlock_vivo (with a modified fastboot binary I found on XDA)

Thanks
 
Last edited:

Swarai

Senior Member
Nov 4, 2013
257
29
Hi

Does anyone know how to unlock the bootloader for the amazing Vivo X21 UD ?

I tried those methods :
Fastboot OEM unlock
Fastboot bbk unlock_vivo (with a modified fastboot binary I found on XDA)

Thanks

In the house of BBK electronics the only phones that I have seen that are developer friendly are oneplus. Vivo and Oppo seem to have stopped "developer-friendliness" years ago. To my knowledge, no factory images or kernel sources have been released for any of their recent high end phones.

May I ask, what result did you get from - Fastboot OEM unlock Fastboot bbk unlock_vivo?

thank you
 

better1

Member
Mar 13, 2011
14
1
In the house of BBK electronics the only phones that I have seen that are developer friendly are oneplus. Vivo and Oppo seem to have stopped "developer-friendliness" years ago. To my knowledge, no factory images or kernel sources have been released for any of their recent high end phones.

May I ask, what result did you get from - Fastboot OEM unlock Fastboot bbk unlock_vivo?

thank you

fastboot oem unlock
remote : unknown command

fastboot bbk unlock_vivo
remote : unlock fail

fastboot vivo_bsp unlock_vivo
remote : check signature fail
 
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izote61

Senior Member
Feb 11, 2015
100
11
vivo x21 ud OEM unloker is in the developer section move the switch and bootloader onlock
 

better1

Member
Mar 13, 2011
14
1
@izote61
Yes the "OEM unlock" switch is on yes.
It's mandatory to unlock any bootloader phone, but it doesn't work. Vivo doesn't allow the operation for now on this phone. We need a someone to hack it or a dev that give us a modified working fastboot binary.
 

pmk_31

New member
Mar 4, 2018
2
0
unlock bootloader vivo x21A UD

Hello everyone, No manipulations work to unlock the boot of vivo x21 A. Fastboot modified or not, nothing to do. It seems that the fastboot command is not the right one ... I am ready to do tests, but I have more ideas. I thought QFIL file (qualcom, but even him for this model, it is not found) ...
Gentlemen help !! Help !!!
 

Naveen Singh

Senior Member
May 15, 2016
78
76
Lucknow
Try my new updated method

Hi

Does anyone know how to unlock the bootloader for the amazing Vivo X21 UD ?

I tried those methods :
Fastboot OEM unlock
Fastboot bbk unlock_vivo (with a modified fastboot binary I found on XDA)
fastboot vivo_bsp unlock_vivo (with a modified fastboot binary I found on XDA)

Thanks

I'm the one who modified fastboot sources for vivo.
I have discovered a new method to unlock bootloader of new vivo devices (tested on vivo Xplay 6, Y51L, 21L)
https://forum.xda-developers.com/ge...ivo-phones-t3686690/post74107690#post74107690
(The new method is in the last UPDATE section of the post)
Video :- https://www.youtube.com/watch?v=DdmrpRxQO74
 
Last edited:

dyzrain

New member
Nov 3, 2018
1
0
I'm the one who modified fastboot sources for vivo.
I have discovered a new method to unlock bootloader of new vivo devices (tested on vivo Xplay 6, Y51L, 21L)
https://forum.xda-developers.com/ge...ivo-phones-t3686690/post74107690#post74107690
(The new method is in the last UPDATE section of the post)
Video :- https://www.youtube.com/watch?v=DdmrpRxQO74

Hi there. please check the youtube video and enlight my name is Diaz in the comment section. I would really appreciate that. Thank you
 

Kovhl

Member
Jan 21, 2019
46
6
Yes please... x21 needs root .. please someone do it....
The os sucks. Sucks like hell. I have to sell the phone if there is no root and stock android
 

Naveen Singh

Senior Member
May 15, 2016
78
76
Lucknow
Ready for some testing?

Yes please... x21 needs root .. please someone do it....
The os sucks. Sucks like hell. I have to sell the phone if there is no root and stock android

Well, I can try some tricks & work if you guys are ready to test.
I don't own a vivo anymore. The old ones are insecure enough to be unlocked.
 
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Kovhl

Member
Jan 21, 2019
46
6
Well, I can try some tricks & work if you guys are ready to test.
I don't own a vivo anymore. The old ones are insecure enough to be unlocked.

Am ready... Will there be a way to restore the phone if anything happens like bricking... ?
And am noob in this. All i have done in past is to unlock and install custom rom and recovery and kernel in one plus x and moto x ghost. No more experience i have. So I need step by step instructions

Sorry for the late reply.. i had lost hope after sometime..
 

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    In the house of BBK electronics the only phones that I have seen that are developer friendly are oneplus. Vivo and Oppo seem to have stopped "developer-friendliness" years ago. To my knowledge, no factory images or kernel sources have been released for any of their recent high end phones.

    May I ask, what result did you get from - Fastboot OEM unlock Fastboot bbk unlock_vivo?

    thank you

    fastboot oem unlock
    remote : unknown command

    fastboot bbk unlock_vivo
    remote : unlock fail

    fastboot vivo_bsp unlock_vivo
    remote : check signature fail
    1
    Ready for some testing?

    Yes please... x21 needs root .. please someone do it....
    The os sucks. Sucks like hell. I have to sell the phone if there is no root and stock android

    Well, I can try some tricks & work if you guys are ready to test.
    I don't own a vivo anymore. The old ones are insecure enough to be unlocked.