[Q] ta partition backup(drm keys - Sony Xperia M

ok guys here is my problem
am trying to unlock bootloader for my xperia m.so safety purpose(re locking bootloader in future) i will take ta partition backup. according to my knowledge ta partition will change on different FW.
so am going to download 15.1.c.2.8 FW ,and flash that and take ta partition backup,so in future if i want to re lock bootloader i will flash first FW which i have downloaded and ill restore the TA partition.
is that fine? or do i need to take additional steps ,,,,, ????

giridhargp said:
ok guys here is my problem
am trying to unlock bootloader for my xperia m.so safety purpose(re locking bootloader in future) i will take ta partition backup. according to my knowledge ta partition will change on different FW.
so am going to download 15.1.c.2.8 FW ,and flash that and take ta partition backup,so in future if i want to re lock bootloader i will flash first FW which i have downloaded and ill restore the TA partition.
is that fine? or do i need to take additional steps ,,,,, ????
Click to expand...
Click to collapse
Yes as long as you unlock the bootloader after the bolded step.

stamatis said:
Yes as long as you unlock the bootloader after the bolded step.
Click to expand...
Click to collapse
Didn't get you sir......
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giridhargp said:
Didn't get you sir......
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Click to expand...
Click to collapse
In the quote of my previous post there is a highlighted part.
Just take the backup before you unlock the bootloader.

Backup TA partition before unlocking bootloader otherwise they will be lost forever
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Related

Relock bootloader

Pls.someone help me how to Relock Bootloader in xperia M
If you have TA backup, use that..
There are various guides on how to do that properly with what precautions you must take and all...
But make sure you flash it over the same firmware you had taken it from, else you'll end up having a brick.
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If i have not TA backup,is than any other procedure to relock bootloader again.
harsh73 said:
If i have not TA backup,is than any other procedure to relock bootloader again.
Click to expand...
Click to collapse
Nope, don't even try to use someone else' TA backup, it will BRICK.
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bootloader

is there any way of recovering bravia engine after unlocking the bootloader ,i have herd something about TA.img but is it efficient in its work and does it properly restore bravia engine(i mean does it give fc after restoring),could any1 xplain me how to backup the TA.img??
bhavstech said:
is there any way of recovering bravia engine after unlocking the bootloader ,i have herd something about TA.img but is it efficient in its work and does it properly restore bravia engine(i mean does it give fc after restoring),could any1 xplain me how to backup the TA.img??
Click to expand...
Click to collapse
U have to backup it before first bootloader unlock
How should i do it?
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bhavstech said:
How should i do it?
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Click to expand...
Click to collapse
Use this tool to backup your TA partition before you unlock the BL: http://forum.xda-developers.com/showthread.php?t=2292598
CokeJunkee said:
Use this tool to backup your TA partition before you unlock the BL: http://forum.xda-developers.com/showthread.php?t=2292598
Click to expand...
Click to collapse
does it cause any sort of fc's after restoring or it works just like normal

Rooting 4.3 help UB

I m rooting my XM SS 1904 by unlocking bootloader what do i need to do?
Do i need ftf to flash right after unlocking bootloader
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Kaml.Sarao said:
I m rooting my XM SS 1904 by unlocking bootloader what do i need to do?
Do i need ftf to flash right after unlocking bootloader
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Click to expand...
Click to collapse
Bro search the forum before posting new thread, look here http://forum.xda-developers.com/showthread.php?t=2696259 and hit thanks
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There's nothing explained about unlocking bootloader
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To
Kaml.Sarao said:
There's nothing explained about unlocking bootloader
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Click to expand...
Click to collapse
Look here if u want to unlock your bootloader - http://forum.xda-developers.com/showthread.php?t=2650510
And no you don't have to flash the ftf right after unlocking bootloader, you can do it anytime... Unlocking bootloader and flashing ftf are two different things
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Hello Kaml,
Im not sure if rooting "by unlcking bootloader" is the only option you are considering but you dont need to unlock bootloader to root 4.3.
I rooted my Xperia on 4.3 following this thread: http://forum.xda-developers.com/showthread.php?p=51730927
If you want to unlock bootloader anyway, please, make a backup of the TA partition first: http://forum.xda-developers.com/showthread.php?t=2292598
To unlock bootloader: http://forum.xda-developers.com/showthread.php?t=2650510
Hit thanks button if you think this answer was useful
DanDare_77 said:
Hello Kaml,
Im not sure if rooting "by unlcking bootloader" is the only option you are considering but you dont need to unlock bootloader to root 4.3.
I rooted my Xperia on 4.3 following this thread: http://forum.xda-developers.com/showthread.php?p=51730927
If you want to unlock bootloader anyway, please, make a backup of the TA partition first: http://forum.xda-developers.com/showthread.php?t=2292598
To unlock bootloader: http://forum.xda-developers.com/showthread.php?t=2650510
Hit thanks button if you think this answer was useful
Click to expand...
Click to collapse
Rooting with locked bl is too complex i didnt get it clearly and didn't used these tools before :/
Can someone please explain it to me clearly what to do
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Hi Kaml.
Yeah, it's a bit confusing when you first go to it. If you dont like the adrenaline/fear/expectation mix, better is to ask someone else to do it for you
You say that's too complicated to root with a locked bootloader. That’s not always true, it’s relative. The post I linked to you is very clear and it’s not complicated at all, but you will need to start from a 4.2.2 rooted ROM, maybe that’s the complicated part for you.
Anyway, I suggest you to confirm if you can unlock your bootloader. Did you checked it already? It may save you time by knowing it beforehand.
To check, go to the dialer and type: *#*#7378423#*#* then go for Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you are able to unlock it. This is from thread http://forum.xda-developers.com/showthread.php?t=2484622
Read that thread, especially when it says “before unlocking please take backup TA partition from here”. By backing up the TA partition you can restore it later if need and then you have some chance of not losing Sony warranty if you ever need it.
Im not aware of other methods for rooting 4.3 besides the link I posted on my first reply, take a look and you will find other methods (probably).
Anyway, if you are interested in backing up the TA partition, it’s only possible if you have a rooted phone already and that’s kinda of a chicken/egg problem so that’s another motive of seeking for rooting methods without touching the bootloader at first. One way to solve it is to half root your phone, enable USB debugging and Unknown Sources from development menu, then run the script to backup the TA partition.
How can i downgrade to 4.1 SS!?
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Kaml.Sarao said:
How can i downgrade to 4.1 SS!?
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Click to expand...
Click to collapse
Bro you need to flash the 4.1 firmware using the flashtool.
Here is XMS 4.1 ftf file link- https://docs.google.com/file/d/0B23-yUd9svboQ3g1cGdKdnlWSDA/edit?pli=1
and here is the guide to use flashtool - http://forum.xda-developers.com/showthread.php?t=2697277
Kaml.Sarao said:
Rooting with locked bl is too complex i didnt get it clearly and didn't used these tools before :/
Can someone please explain it to me clearly what to do
Sent from my C1904 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
If you dont understand it. Go to this thread: http://forum.xda-developers.com/showthread.php?t=2709911
.go to page 9 of that thread an there you will see a step by step guide on how to root with LB made by me. Go for it. It is made in a lot if detail.
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Ok i have finally rooted with LB..
But when i tried to swap storage n flash zip file using flash gordon it says not a valid file..
& i m not getting it worked..
I have used this method
http://forum.xda-developers.com/showthread.php?t=2711280
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[Q]Why I can't unlock bootloader after relock

After I unlocked bootloader on my T2 . I used Flashtool to relock it .Then I can't lock it again. Why?
the flash tool shows: remore:command did not succeed. How can I lock it again? 3Q please help me :crying:
Did You Backup Your DRM keys and Partition Via TA Backup, Before Unlocking bootloader ?
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lostfurby said:
Did You Backup Your DRM keys and Partition Via TA Backup, Before Unlocking bootloader ?
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Click to collapse
I used to backup it but my old computer has been sold out,so I don't have the DRM keys now. :crying::crying: What should I do?:crying:
gorthend said:
I used to backup it but my old computer has been sold out,so I don't have the DRM keys now. :crying::crying: What should I do?:crying:
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Click to collapse
There is probably a backup of TA.img on mobile.. It'll be in the sdcard. That's the home folder.
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Restore Ta partition

Hi i have my ta partition backuped before. Do i need to restore/flash to the same exact fw I have when I backup my TA or restoring with any stock rom version okay and would not brick my device
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I think any working ROM should be fine but I will not pay for your bricked phone, ok?
F308 said:
I think any working ROM should be fine but I will not pay for your bricked phone, ok?
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Click to collapse
Thanks already restored now my ta. One thing that surprised me though is that restoring supposedly relocks the bootloader which it did but the root maintained i thought relocking bl will also remove root and you have to unroot again with methods for locked BL
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