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[Q] UB already, can I still do TA backup?

OP infra4800

29th May 2014, 10:37 AM   |  #1  
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I bought used Xperia Z1, and today went to service menu and noticed the bootloader is already unlocked.

This is I understand should be procedure:

TA backup > Unlock bootloader > Root > Downgrade

question is can I still do TA backup now? knowing it already came with unlocked bootloader ?

P.S.
ver - 4.3 .136
root - no, (no SuperUser seen)

DRM keys -> present
29th May 2014, 11:01 AM   |  #2  
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Flag AnGiang (VN)
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You can check DRM status
Quote:
Originally Posted by eclyptos

Type *#*#7378423#*#* on your phone and go to Service Test > Security, if you have [Unknown Error] instead of [Key OK] they are lost, to restore them the only way is to use Backup of your TA. If you have all [Key OK] they are OK!


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29th May 2014, 11:08 AM   |  #3  
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simple answer is no

You have wiped your ta partition when unlocking

however, there is no need to unlock the bootloader to root, just follow the link in my signature

also, you need root to backup the TA

And I bet your bootloader is not already unlocked, they do not come like that

dial
*#*#7378423#*#*
goto service info and configuration. Post what the last line says

I bet it says

bootloader unlock allowed: yes

That means you are able to unlock it, but it is not unlocked yet

If it was unlocked it would say

Bootloader unlocked: yes
Last edited by gregbradley; 29th May 2014 at 11:11 AM.
29th May 2014, 12:19 PM   |  #4  
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Quote:
Originally Posted by hxq88

You can check DRM status



Sent from my C6903 using XDA Free mobile app

Quote:
Originally Posted by gregbradley

simple answer is no

You have wiped your ta partition when unlocking

however, there is no need to unlock the bootloader to root, just follow the link in my signature

also, you need root to backup the TA

And I bet your bootloader is not already unlocked, they do not come like that

dial
*#*#7378423#*#*
goto service info and configuration. Post what the last line says

I bet it says

bootloader unlock allowed: yes

That means you are able to unlock it, but it is not unlocked yet

If it was unlocked it would say

Bootloader unlocked: yes



Thanks for replying I am new to Sony phones, coming from Galaxy world !!!

here is what I get in service menu for DRM keys and Unlock bootloader (attached pics)

so this is what I understand: it is unlocked bootloader,
I can root it
I can install custom roms etc.
but incase anything goes wrong, I cannot go back and install stock rom, or downgrade from 4.3 (currently) to 4.2.2 ? and claim warranty ...
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29th May 2014, 12:30 PM   |  #5  
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Quote:
Originally Posted by infra4800

Thanks for replying I am new to Sony phones, coming from Galaxy world !!!

here is what I get in service menu for DRM keys and Unlock bootloader (attached pics)

so this is what I understand: it is unlocked bootloader,
I can root it
I can install custom roms etc.
but incase anything goes wrong, I cannot go back and install stock rom, or downgrade from 4.3 (currently) to 4.2.2 ? and claim warranty ...

yes, just flash XZDR kernel from here http://nut.xperia-files.com/
http://prntscr.com/3nnvhr

Just extract boot img, flash using fastboot, then enter recovery and flash the whole .zip to get wifi modules etc


Then flash SuperSU.zip from chainfire
http://download.chainfire.eu/420/Sup...erSU-v1.99.zip


then enter philz recovery, goto philz options and tick "fix root on reboot"
reboot to system and fix root.

All done.

Yes you can flash stock FTF files and yes you can downgrade, but there is no point.
29th May 2014, 12:37 PM   |  #6  
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You can downgrade but do take not that sometimes you lose your IMEI when skipping major downgrades for example when you're on android 4.4 and you flash a android 4.2 ftf you'll lose your IMEI. Workaround is you have to flash android 4.3 1st before android 4.2
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