TA partition question - Xperia Z Q&A, Help & Troubleshooting

Hi, when I flash a custom rom or I flash a stock firmware with another country code does the TA partition gets modified? Generally, in which case the ta partition gets modified?

davros93 said:
Hi, when I flash a custom rom or I flash a stock firmware with another country code does the TA partition gets modified? Generally, in which case the ta partition gets modified?
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If you want a custom ROM you need a unlocked bootloader. If you unlock your bootloader you loose the drm-keys, which are included in the TA. That's the reason why you should do a TA-Backup before unlocking the bootloader.

Ok, I already knew this. Is unlocking the bootloader the only way in which ta partition gets modified?

davros93 said:
Ok, I already knew this. Is unlocking the bootloader the only way in which ta partition gets modified?
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It's the only way I know.
Remember: always read carefully before doing something.

gripfly said:
It's the only way I know.
Remember: always read carefully before doing something.
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Not true. All flashing stock firmware modify ta partition.
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Backup of ta partition made in December (on left) and yesterday (on right) simply opened in notepad++ as text and compared.
You can see even witch customisation I flashed. While editing you can find your IMEI, etc. I believe we could unlock bootloader hardlocked by provider with editing ta partition.
Wysłane z mojego C6603 przy użyciu Tapatalka

The contents of the TA partition vary between boots and firmware flashes, as there's an area that logs are written to. That does not mean it's safe to tamper with it.
If you edit any of the secure sections of the TA partition (bootloader lock status, IMEI, SIM lock status etc), you will end up with a hard brick. It's part of the chain of trust and it's contents are verified on boot. If verification fails, the bootloader refuses to boot into any mode (that means it will not boot into Android, flashmode or fastboot).
In short, don't do it.
Sent from my C6603 using Tapatalk

Related

Can't unlock bootloader

I'm trying to unlock the bootloader of my C6603 and I keep getting errors or bootloops. My bootloader can be unlocked according to the attached screen.
I tried with Minimal ADB and I'm getting bootloops and with Sony Bootloader Unlock it's failing, according to this pic:
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Drivers are installed correctly.
What's the catch?
Try using the fastboot package provided by DooMLoRD in his thread - http://forum.xda-developers.com/showthread.php?t=2153261
Also, the unlock key they send you is case sensitive, so double check what you're entering.
Sent from my C6603 using Tapatalk
I tried with DL's method and just tried with FT. STILL getting BOOTLOOPS !
Try flashing a stock FTF with full wipe, then try again.
Also, I just noticed that your IMEI number is in your screenshot. I would remove it from the image if I were you.
Sent from my C6603 using Tapatalk
Tried it. Still getting bootloops.
Then I can't think of anything else apart from trying a different USB cable/port or PC, but that probably won't make any difference.
When I unlocked my bootloader it worked straight away with no problems.
Sent from my C6603 using Tapatalk
It worked on my XS. Looks like this one is a mystery.
Edit: CLEAN flashed it and tried an other port. Worked. Thanks for the suggestion!
You're welcome.
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As I remember, flashing an unlocked-BL phone won't relock it, right? I'd like to relock it after gaining root on the .569.
That's correct.
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cipri92 said:
As I remember, flashing an unlocked-BL phone won't relock it, right? I'd like to relock it after gaining root on the .569.
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Don't forget to backup your TA before you unlock the bootloader. Otherwise you'll loose your DRM keys forever and won't be able to re lock your bootloader
Sent from my C6603 using Tapatalk
Too late.

.257 FTF Singapore fw wanted

Hi guys, I have this 2nd hand Xperia SP. It's already at Android 4.3, it is a Singapore firmware.
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I want to go back to an old rootable firmware so I can back up its TA partition before unlocking its bootloader. My question is, can I just flash any .257 firmware(regardless of customization number)? Like the one in here -> http://forum.xda-developers.com/showpost.php?p=42255153&postcount=3
Or can anybody link me to the same Singapore customization as mine, the old rootable firmware.
Thanks all in advance.
Rycon33 said:
Hi guys, I have this 2nd hand Xperia SP. It's already at Android 4.3, it is a Singapore firmware.
I want to go back to an old rootable firmware so I can back up its TA partition before unlocking its bootloader. My question is, can I just flash any .257 firmware(regardless of customization number)? Like the one in here -> http://forum.xda-developers.com/showpost.php?p=42255153&postcount=3
Or can anybody link me to the same Singapore customization as mine, the old rootable firmware.
Thanks all in advance.
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you can flash any 4.1.2 ftf for your C5303,then root it & flash recovery
then backup TA & unlock bootloader
Ben Ling said:
you can flash any 4.1.2 ftf for your C5303,then root it & flash recovery
then backup TA & unlock bootloader
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Thanks.
But I've read some had issues on battery gauge acting abnormal after firmware downgrade, is this a wide issue?
Tapatalked from my Xperia P
Rycon33 said:
Thanks.
But I've read some had issues on battery gauge acting abnormal after firmware downgrade, is this a wide issue?
Tapatalked from my Xperia P
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not very sure,but as i know your phone will be fine
Ben Ling said:
not very sure,but as i know your phone will be fine
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Thanks, good to know.
Tapatalked from my Xperia P

Was my Bootloader ever unlocked?

The question comes to my mind,because of the following reasons :
1) Bravia Engine not working (flashed xreality zip by @xperiaz2 but still no success)
2) Gracenote not working
But the catch is,that the "issues" I'm facing are in the replacement device(refurbished) that SONY gave me recently for the dead pixel issue :-/
I went in the service menu and it shows bootloader unlock allowed: yes
I even backed up TA partition of this device but it's of much lesser size than of my original device
The only thing that I could think of right now that I might have done wrong here is that, as I got my replacement, I restored the entire TWRP backup (system,data,,,) which I had taken in my original device,without noticing the BRAVIA ENGINE in album
So I wanted to know that whether my bootloader was ever unlocked by someone earlier, and that I've lost my drm keys??
Should I return this device to them?
Please guys,help me on this one!
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XDA Y U SO AWESOME?? ლ(ಠ益ಠლ)
You can check the status of your DRM keys in the service menu.
Enter *#*#7378423#*#* in the dialler then look in Service tests - Security. All the keys should say [Key OK][Active].
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Bootloader unlock allowed = yes, means bootloader is still locked and unlockable.
teddymild said:
Bootloader unlock allowed = yes, means bootloader is still locked and unlockable.
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It could have been unlocked before and relocked and it would still say that though. That's why I posted the method to check whether the DRM keys are intact or not.
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kingvortex said:
It could have been unlocked before and relocked and it would still say that though. That's why I posted the method to check whether the DRM keys are intact or not.
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All the keys are... Keys Ok :-/
Then what have I done wrong?
Rumman Shaikh said:
All the keys are... Keys Ok :-/
Then what have I done wrong?
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I don't know, possibly something to do with restoring a backup from another device. If DRM keys are intact, BE2 should work. Try flashing a stock rom with Flashtool and see if it works then.
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Help My ZR Black Screen

i tried to flash CM 12.1 on my locked bootloader zr from twin recovery
after finish phone won't open only black screen
i tried to flash original ftf again but i got this and boot loop
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i flashed the ftf again but nothing just fail and black screen
can someone help me plz
Non stock-based ROMs require an unlocked bootloader. Flashing the stock FTF has always fixed this problem for me. Try again, with all the WIPE checkboxes ticked in Flashtool, and don't exclude anything.
P.S. Please reupload the images, if they are necessary.
SirVer said:
Non stock-based ROMs require an unlocked bootloader. Flashing the stock FTF has always fixed this problem for me. Try again, with all the WIPE checkboxes ticked in Flashtool, and don't exclude anything.
P.S. Please reupload the images, if they are necessary.
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it worked after flashing ftf for 3 times
but if i want to use cm rom then i'll need to unlock the phone but i'll lose brave engine and other things
is it possible to re lock it again and restore the ta backup ???
will that work or it's not possible
That's actually what I do: take a TA backup, use a custom ROM, then restore and lock if I feel like going back to stock. There's a simple tutorial on the Backup TA thread (search for it). You'll have to be rooted though, and if you're on 5.0.2 or above, you'll probably have to unlock just to root, which is obviously useless for you. I suggest flashing JB (easiest to root) or KK (don't remember if you need unlock for this), root, and take a backup. After that, you can unlock and flash anything with no worries. ?
SirVer said:
That's actually what I do: take a TA backup, use a custom ROM, then restore and lock if I feel like going back to stock. There's a simple tutorial on the Backup TA thread (search for it). You'll have to be rooted though, and if you're on 5.0.2 or above, you'll probably have to unlock just to root, which is obviously useless for you. I suggest flashing JB (easiest to root) or KK (don't remember if you need unlock for this), root, and take a backup. After that, you can unlock and flash anything with no worries. ?
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that's cool thanks
i can flash my pre-rooted 5.0.2
and i'll try to unlock and use the cm 12.1

How to downgrade from Pie to Oreo?

Been trying to root my XZ1 compact for a while now. Never knew it'd be this complicated tbh compared to other Android phones like Samsung or OnePlus. I'm following j4nn's guide, but I'm stuck on step 2 where I can't find an older firmare on XperiFirm (all 3 UK firmwares are on pie). I've already bricked my Z5 compact which is stuck in bootloop, can't afford to brick another Sony phone.
Does anyone know where I can find an Oreo firmware to downgrade in order to proceed to the next step?
If it's in a bootloop, then it's not bricked. You probably need to format one of the partitions, maybe data, and/or re-flash matching partitions. I'd just start over from a stock rom for the Z5c (there was no XZ5)
For the XZ1, check out this thread: https://forum.xda-developers.com/t/...int-wi-fi-calling-step-by-step-guide.4502093/
Where eparr has a link for an Oreo firmware (he needs to root before modding the OEM partition).
Good luck!
tonsofquestions said:
If it's in a bootloop, then it's not bricked. You probably need to format one of the partitions, maybe data, and/or re-flash matching partitions. I'd just start over from a stock rom for the Z5c (there was no XZ5)
For the XZ1, check out this thread: https://forum.xda-developers.com/t/...int-wi-fi-calling-step-by-step-guide.4502093/
Where eparr has a link for an Oreo firmware (he needs to root before modding the OEM partition).
Good luck!
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Might sound odd but where is the actual link to the firmware? All thats attached is an apk file and pdf's.
Did you look through the PDFs? They're how-to guides, which include a link to the firmware.
> Download the XZ1-Compact_MetroPCS_VoLTE+Pie+FP.zip (5.2GB).
tonsofquestions said:
If it's in a bootloop, then it's not bricked. You probably need to format one of the partitions, maybe data, and/or re-flash matching partitions. I'd just start over from a stock rom for the Z5c (there was no XZ5)
For the XZ1, check out this thread: https://forum.xda-developers.com/t/...int-wi-fi-calling-step-by-step-guide.4502093/
Where eparr has a link for an Oreo firmware (he needs to root before modding the OEM partition).
Good luck!
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So I've been trying to flash a stock rom that I downloaded for the Z5c using Newflasher. However everytime I try to it keeps giving me this error:
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
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Is your phone in flash mode? I think it should be a blue light that you get after plugging in while holding the volume down(? might be up) button.
You could also try a different usb port on the computer (try without a hub) and make sure you have the right drivers installed.
But either way, that error is likely a PC software one. Though it does depend on what the phone is able of doing, which you haven't said.

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