Database Develop

Questions about unlocking bootloader?

Hi guys,
I loaded my brand new xperia sp with root and cwm on a locked bootloader but now i want to try out CM but from what i understand is that you need an unlocked bootloader, so my question is if i backup my TA partition and unlock my bootloader, then flash cm with it's kernel and would it be possible to reflash the TA partition and relock the bootloader while on CM?
thanks,
noahvt

noahvt said:
would it be possible to reflash the TA partition and relock the bootloader while on CM?
Click to expand...
Click to collapse
No
You can only restore your TA partition and relock the bootloader on the original Sony kernel, if you try to do otherwise you may hard brick your phone.

/\ /\
That.. But you could figure this out by reading the tutorial of DoomLord
All the steps for unlocking and relocking the bootloader are described there

[Q] How to Root/UB/Backup TA with 4.3

Hi guys,
I'm kinda desperate right now. I am using 4.3 with 12.1.A.0.266 firmware.
My aim is to install CWM. For this I need an unlocked Bootloader and Root.
But all tutorials I could find are kinda contradicting themselves.
To root I need UB.
To unlock Bootloader in need to Backup TA partition.
And to backup TA partition I need root.
The tools from doomlord all require the old firmware, but silly me has already updated.
Is there any way to unlock Bootloader without root for backuping TA partition OR root with locked bootloader?
Any help is appreciated

Im afraid there isnt any root method for locked bootloader, so You must flash 4.1 using flashtool, root 4.1, backup TA, flash 4.3, unlock BL, root 4.3 and relock BL by restoring TA. The whole process just sounds hard and its complicated but follow those steps and itll be fine
Cheers
Sent from my C5303 using XDA Premium 4 mobile app

teddy74eva said:
You must flash 4.1 using flashtool, root 4.1, backup TA, flash 4.3, unlock BL, root 4.3 and relock BL by restoring TA.
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Click to collapse
When updating to 4.3 I lose root, dont I? So there must be a way to unlock BL with no root? I think then i would lose my Drm keys, thats why i backuped them on 4.1, didn't I? And i surely can use the backup of TA i made in 4.1 for version 4.3?
Thank you for your help already!

Same, Bro
ShotingCox said:
Hi guys,
I'm kinda desperate right now. I am using 4.3 with 12.1.A.0.266 firmware.
My aim is to install CWM. For this I need an unlocked Bootloader and Root.
But all tutorials I could find are kinda contradicting themselves.
To root I need UB.
To unlock Bootloader in need to Backup TA partition.
And to backup TA partition I need root.
The tools from doomlord all require the old firmware, but silly me has already updated.
Is there any way to unlock Bootloader without root for backuping TA partition OR root with locked bootloader?
Any help is appreciated
Click to expand...
Click to collapse
I got same dilemma. Worstly , I am already unlock bootloader without doing Backup TA . Can I relock bootloader,do the Backup TA again??

kclement said:
I got same dilemma. Worstly , I am already unlock bootloader without doing Backup TA . Can I relock bootloader,do the Backup TA again??
Click to expand...
Click to collapse
i am afraid you cant get ur DRM keys back as you didn't took a TA backup before unlocking bootloader.. :

[Q] Can I relock bootloader and do the backup ta?

As the title,
I did not do the backup ta before I unlock bootloader . And now, can i use some other way to relock bootloader ,and then do the backup ta again?
Greatly hope someone can answer the question (

kclement said:
As the title,
I did not do the backup ta before I unlock bootloader . And now, can i use some other way to relock bootloader ,and then do the backup ta again?
Greatly hope someone can answer the question (
Click to expand...
Click to collapse
i am afraid you cant..

[Q] restore ROM Backup with TA Partition

Hello,
i have an Firmware Backup from the Stock 157 ROM with TA Patition (ta.emmc.win, ta.emmc.win.md5) on my SD Card. I made this before i unlock my device.
When i would restore this Backup, is the Bootloader closed after this, or would my device Hardbricked?
Greets Lars

No one an idea?

-Happy Feet- said:
Hello,
i have an Firmware Backup from the Stock 157 ROM with TA Patition (ta.emmc.win, ta.emmc.win.md5) on my SD Card. I made this before i unlock my device.
When i would restore this Backup, is the Bootloader closed after this, or would my device Hardbricked?
Greets Lars
Click to expand...
Click to collapse
My advice, try to lock the bootloader first (Be sure to be on stock .157 before relocking and backup your SD CARD) then after that, restore your backup stock .157. Everything should work fine since you'd just relock your bootloader, maybe it will erase some data, but in my case after i unlock or relock my BL, no data was loss during the procedure.
For the TA Partition, have you made any backup using this method or any backup TA tool? I can't assure you if the DRM keys will still be intact in the backup ROM.

yoorie016 said:
My advice, try to lock the bootloader first (Be sure to be on stock .157 before relocking and backup your SD CARD) then after that, restore your backup stock .157. Everything should work fine since you'd just relock your bootloader, maybe it will erase some data, but in my case after i unlock or relock my BL, no data was loss during the procedure.
For the TA Partition, have you made any backup using this method or any backup TA tool? I can't assure you if the DRM keys will still be intact in the backup ROM.
Click to expand...
Click to collapse
Sure, an Backup is already present at my PC. That was the first thing that I have do with this phone. I ask only if it possible with this way. I mean I have read last year an post from Doomloard. But I can't find this post.

Good! Relock using flashtool, restore backup then check if there are any issues, then finally, restore the DRM keys, just to be sure..

I think it is better I flash an complete ftf file an relock then... I don't need this backup anyone... Thanks for help.

-Happy Feet- said:
I think it is better I flash an complete ftf file an relock then... I don't need this backup anyone... Thanks for help.
Click to expand...
Click to collapse
Okay, just check first if the DRM keys are still intact after flashing the ftf, then closed this thread after if the problem is solved. thank you!

if u want to unlock bl: use flashtool
if u want to relock bl: use TA tool [if and only if u did a back up using TA and b4 unlocking bl]
BE ON STOCK FTF

TA-Backup

Hello,
does someone know if a TA-Backup (and restore) would be possible, assuming there will be a method to root the XP with locked bootloader?
Regards, DiLeon

DiLeon said:
Hello,
does someone know if a TA-Backup (and restore) would be possible, assuming there will be a method to root the XP with locked bootloader?
Regards, DiLeon
Click to expand...
Click to collapse
To backup TA u need root > to get root u need unlock bootloader > if u unlock BL u'll lose TA... Circle

Desperanto86 said:
To backup TA u need root > to get root u need unlock bootloader > if u unlock BL u'll lose TA... Circle
Click to expand...
Click to collapse
Yes, I know. Already did that in the past with my Z1c, Z2Tablet, Z3c ... But somewhere in the Z5 forum I read that it won't be possible, even when geeting rooted with a locked bootloader!? So maybe Sony changed something regarding TA partition and/or DRM storage?