Database Develop

[Q] Unlock bootloader wipes all data ?

Hello.
Im abit new to the forum but here goes.
Ive read tons of posts everywhere and there aint any exact answers anywhere to find.
In the past ive never known about the TA and DRM so happy as i am i just unlocked the bootloader on all the phones and still happy. The latest phone is the Xperia Z1. It has been abit buggy to say the least but im hoping software updates will cure this.
Anyway, i rooted my phone and unlocked the bootloader on the .681 firmware and now i am on .757 firmware. Using Doomlords kernel. I thought id check if i could backup my TA partition after unlocking the bootloader. And from what ive read its suppose to be wiped when you unlock the bootloader.
Well it was no problem backing up the TA partion. All files were there and it came out with no errors. So the question, how is this possible ?
I posted this same thing in General, sorry for that but i posted it here now so if a moderator finds this post in general then please delete it.
/Jonas740

If you Unlocked your Bootloader without Backup TA (DRM keys) first, then your DRM Keys are lost forever and you can Backup TA how much you want but there is no DRM Keys at all. The application to Backup TA do not give errors because you can backup partitions with or without DRM Keys, in the case you want switch between Locked and Unlocked Bootloader.
So long story short, you don't have DRM Keys, your warranty is lost forever, you cannot Update via OTA,PC Companion or SUS.

eclyptos said:
If you Unlocked your Bootloader without Backup TA (DRM keys) first, then your DRM Keys are lost forever and you can Backup TA how much you want but there is no DRM Keys at all. The application to Backup TA do not give errors because you can backup partitions with or without DRM Keys, in the case you want switch between Locked and Unlocked Bootloader.
So long story short, you don't have DRM Keys, your warranty is lost forever, you cannot Update via OTA,PC Companion or SUS.
Click to expand...
Click to collapse
The one time I had to use my warranty there was no problem with missing TA.
So there is hope for people without it
Sent from my C6903 using XDA Premium 4 mobile app

well.
HellRoot said:
The one time I had to use my warranty there was no problem with missing TA.
So there is hope for people without it
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
dunno if the previous author saw what i wrote in my post but when i relocked my Xperia V using flashtool i could update with the pc companion or sony update or whats it called nowdays
And funny thing is, i actually have a case at Sony about this phone since i do have some issues with it but i think thats software related since ppl have been getting all sorts of errors from the KitKat firmwares. But i said how it was that i have unlocked bootloader and all that and she replied that my warranty was still valid and i could send it in for them to test it.
And i need to say this. Since sony posts an official way on their webpage, for ANYONE to read about how to unlock the bootloader and they also supply the code for unlocking it. Then i think it shouldnt affect the phone in any way or brake the warranty. (Sure it does say something about that, but all aint reading stuff like that). So if a developer wanted to unlock the phone. Why not have them contacting sony instead.
And surley, DRM keys (i just think sony shouldnt even bother having them) can be put back in if you let Sony do it. They put it there in the first place you know. And in the lovely electronic world we live in we all know that, if Sony can put thoose there, anyone could do it with the knowhow. But since the keys dont really mean anything, not that ive noticed you could really think about what use they actually do. And Sony knows that if ppl cant have the phone it was meant to be even with a unlocked bootloader, they will probably get some other phone or just whine hard enough so that Sony makes a software where everything works the same way with locked or unlocked. Camera stopped to work if you unlocked before 4.3 right ? What can you read about that like everywhere ? Loads of whining and Sony released a software that works just as good with locked or unlocked.
God damn this became a long post. So with this said im just saying. Why even bother in the first place having DRM keys if the rules dont apply anyway ? An everyday user doesent even need them either, he or she doesent even know what rooting or unlocking is anyway. And the ones that do know about it, also know about how to whine to get sony to fix the errors wich an unlock will produce

Jonas740 said:
dunno if the previous author saw what i wrote in my post but when i relocked my Xperia V using flashtool i could update with the pc companion or sony update or whats it called nowdays
And funny thing is, i actually have a case at Sony about this phone since i do have some issues with it but i think thats software related since ppl have been getting all sorts of errors from the KitKat firmwares. But i said how it was that i have unlocked bootloader and all that and she replied that my warranty was still valid and i could send it in for them to test it.
And i need to say this. Since sony posts an official way on their webpage, for ANYONE to read about how to unlock the bootloader and they also supply the code for unlocking it. Then i think it shouldnt affect the phone in any way or brake the warranty. (Sure it does say something about that, but all aint reading stuff like that). So if a developer wanted to unlock the phone. Why not have them contacting sony instead.
And surley, DRM keys (i just think sony shouldnt even bother having them) can be put back in if you let Sony do it. They put it there in the first place you know. And in the lovely electronic world we live in we all know that, if Sony can put thoose there, anyone could do it with the knowhow. But since the keys dont really mean anything, not that ive noticed you could really think about what use they actually do. And Sony knows that if ppl cant have the phone it was meant to be even with a unlocked bootloader, they will probably get some other phone or just whine hard enough so that Sony makes a software where everything works the same way with locked or unlocked. Camera stopped to work if you unlocked before 4.3 right ? What can you read about that like everywhere ? Loads of whining and Sony released a software that works just as good with locked or unlocked.
God damn this became a long post. So with this said im just saying. Why even bother in the first place having DRM keys if the rules dont apply anyway ? An everyday user doesent even need them either, he or she doesent even know what rooting or unlocking is anyway. And the ones that do know about it, also know about how to whine to get sony to fix the errors wich an unlock will produce
Click to expand...
Click to collapse
closed for being a duplicate.
use this link for other thread.
http://forum.xda-developers.com/showthread.php?t=2730169

[Q] DRM Restore by Sony?

HI Guys,
After an interesting day , getting to grips with my Xperia Z , I'm now left wondering about my missing DRM Certificates.
Have anyone successfully managed to get Sony to restore their files by means of an out of warranty repair?
Obviously by unlocking the boot loader we confirm that we are foregoing our warranty coverage , but I would have thought that Sony would have the original DRM Keys on a server somewhere?
Any thoughts , experiences or advice would be great.
Also what does NOT having DRM Keys prevent you from doing on the Experia Z ? , Reading the Sony FAQ it would seem that it stops high end devices like the Z3 from using image enhancement algorithms , but how does it effect the Z ?
Many thanks guys , for a warm welcome to this board , it's a great place to be.
Sixx :laugh:

I've never heard of anybody getting Sony to restore DRM keys to their device. They normally refuse to touch anything caused by unlocking the bootloader, even if you offer to pay. Also, it's not as simple as Sony pulling them from a server and copying them to your phone, as they're specific to your particular device and stored on an encrypted partition (the TA partition).
On the Xperia Z, loss of the DRM keys stops Bravia Engine 2 working, as well as screen mirroring. As far as I know, that's it. Someone correct me if I forgot something else that's affected.
Sent from my C6603 using Tapatalk

Ahhhh I see , oh well no huge loss then.
It's a shame that they don't enable DRM restoration , as they give the option to unlock the boot loader
Thanks for the reply.
Sixx

sixxdog_uk said:
Ahhhh I see , oh well no huge loss then.
It's a shame that they don't enable DRM restoration , as they give the option to unlock the boot loader
Thanks for the reply.
Sixx
Click to expand...
Click to collapse
You're welcome. Happy to help.
I'm not sure why they have the system of erasing DRM keys when unlocking the bootloader. On one hand they boast of being open by officially offering unlock keys (and it's great that they do!) but on the other hand they then remove functionality permanently if you take advantage of that openness. Confusing to say the least!
Sent from my C6603 using Tapatalk

DRM how to check?
Well this is interesting...............
Earlier today before I repaired and stock ROM flashed my Xperia Z I had one set of Certificates which was for Live Application.
Now after refreshing and locking the boot loader then reloading the latest ROM including 4.4.4 Android I have 4 Sets , Application , Platform , Shared & Media ??
Now I might be grasping at straws , but could this mean that my MEDIA DRM has been restored in some way? or maybe it was never gone?
Is there a simple test to check if DRM is still present?
I doubt it is , but as i have no idea about what was done to the phone before I bought it , maybe just maybe the DRM is still there?
Hope this isn't something that has been covered already , but i doubt there is anything really new
Cheers,
Sixx
(Note: Bravia Engine 2 & Screen Mirroring both seem to be working.)

You can check your DRM keys by following this procedure -
Enter *#*#7378423#*#* in the dialler.
Select "Service tests".
Select "Security".
If any keys have an error, then they're lost.
Sent from my C6603 using Tapatalk

Test Results
kingvortex said:
You can check your DRM keys by following this procedure -
Enter *#*#7378423#*#* in the dialler.
Select "Service tests".
Select "Security".
If any keys have an error, then they're lost.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
Ok so i tested the security keys and got this.....
MARLIN [Unknown Error][Active]
WMLA [Unknown Error][Active]
HUK : xxxxxxxxxxxxxxxx [Key OK][Active]
PRODID_AID : 0001 [Key OK][Active]
OTP_LOCK_CONFIG : xxxxxxxxxxx[Key OK][Active]
OTP_LOCK_STATUS : xxxxxxxxxx[Key OK][Active]
AUTH_ENABLE : 01 [Key OK][Active]
DEVICE_ID : xxxxxxxxxxx[Key OK][Active]
So I'm guessing the top two are the result of the missing DRM? , But what are the others? anything interesting?
Cheers,
Sixx

Yes, the Marlin and WMLA keys are what's erased when unlocking the bootloader.
As for the other keys, I don't know what they're for, to be honest.
Sent from my C6603 using Tapatalk

Thanks
kingvortex said:
Yes, the Marlin and WMLA keys are what's erased when unlocking the bootloader.
As for the other keys, I don't know what they're for, to be honest.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
Ok thats that then , thanks for the advice.
Sixx

You're welcome.
Sent from my C6603 using Tapatalk

Is this weird or normal?

I searched high and low for solution of my problem but i couldnt find the right solution to my problem that's why I'm starting this thread.
Phone- Xperia Sp C5302
Stock Kernel
Rooted
Philz Touch recovery installed
Nandroid backup made using TWRP
Tried to unlock bootloader- Problem starts from here........
Initially phone rebooted normally but couldn't detect sim and signal.
Then phone started rebooting after few minutes . Stay on for a while then reboot again till battery died.
Now battery not charging, phone showing no life, no led, no vol up+power, vol- power , vol up+vol down+power work
Tried everything I know plz help and plz explain slowly and calmly.
THANKS IN ADVANCE.
EDIT:
Used wall charger 2amp for charging left overnight no red led or anything as described in other posts
Connected to laptop left for about 4 hours no nothing.
Tried to connect in fast boot not detected.
Any more ideas guys at least give some pointer for what to do or is my Sp is actually dead ? And I can't restore my backup? Plz guys help
EDIT: Pressed the small button at the back and the phone came back to life YESSSSS........

Now the phone isn't showing imei no. or sim or network. But when restarted it imei and network came back magically. So I thought the problem is solved to confirm it I switched phone off again then switched on then imei and network gone again and also baseband isn't showing too (I'm sorry if it is the same thing I'm a newb to this stuff)
Then again I restarted the phone number it came again. I don't know what to do in this situation. I just wanted to unlock bootloader and install xenon hd rom in my Xperia Sp.

Zeemanv2 said:
Now the phone isn't showing imei no. or sim or network. But when restarted it imei and network came back magically. So I thought the problem is solved to confirm it I switched phone off again then switched on then imei and network gone again and also baseband isn't showing too (I'm sorry if it is the same thing I'm a newb to this stuff)
Then again I restarted the phone number it came again. I don't know what to do in this situation. I just wanted to unlock bootloader and install xenon hd rom in my Xperia Sp.
Click to expand...
Click to collapse
Try flashing stock ftf with Flashtool.
If the problem gets solved, then start with the new ROM.

Zeemanv2 said:
Now the phone isn't showing imei no. or sim or network. But when restarted it imei and network came back magically. So I thought the problem is solved to confirm it I switched phone off again then switched on then imei and network gone again and also baseband isn't showing too (I'm sorry if it is the same thing I'm a newb to this stuff)
Then again I restarted the phone number it came again. I don't know what to do in this situation. I just wanted to unlock bootloader and install xenon hd rom in my Xperia Sp.
Click to expand...
Click to collapse
Use the method answered by the previous post. But I will add into that
You can use the flashtool to flashing everything stock but please dont flash System and Kernel. If you flashed a custom recovery and want it to stay untick Fotakernel as well.
This should fix your problem without having to deal with the stock ROM.
But if problem persists then I would suggest a complete stock ROM flash.
Huge chance that the process of unlocking your bootloader is faulty. Are you sure that it went without errors? Anyway you might also wanto to try to relock and then unlock the bootloader again

@Zenith I left the phone idle for sometime now it's OK ish . I've made a nandroid backup but can u tell me plz which folder contains imei and other important stuff so I can make a backup of it too.
BTW I think my bootloader is not correctly unlocked coz pc companion is detecting my phone bravia engine is there gracenote is working. But in service menu under configuration I found: Bootloader unlocked: Yes.
Previously it was Bootloader unlock: Yes. So is it unlocked or not if not then how to unlock?
I've followed sony's official unlocking method.

Zeemanv2 said:
@Zenith I left the phone idle for sometime now it's OK ish . I've made a nandroid backup but can u tell me plz which folder contains imei and other important stuff so I can make a backup of it too.
BTW I think my bootloader is not correctly unlocked coz pc companion is detecting my phone bravia engine is there gracenote is working. But in service menu under configuration I found: Bootloader unlocked: Yes.
Previously it was Bootloader unlock: Yes. So is it unlocked or not if not then how to unlock?
I've followed sony's official unlocking method.
Click to expand...
Click to collapse
You don't need to backup imei. It will stay the same no matter what ROM you use.
and You can use Titanium Backup to backup all your important apps and data. But do not backup/restore system apps.
and in the service menu;
"Bootloader Unlock allowed - Yes" means that your Bootloader is Locked, and you can unlock it.
"Bootloader Unlocked - Yes" means that your Bootloader is unlocked.
Bravia engine shouldn't work if your BL is unlocked, so something must have gone wrong in the process.
Follow what's said in post #4.

@Zenith Thank you for your wonderful suggestion i will do as u say. bt one big noob ques- Do i have to dload a ftf file to flash to stock cant i use my backup or someyhing from it to restore?
@TechnoSparks yeah i think you are right about my bootloader bt isnt there something to check if BL is unlocked correctly. Btw when i requested to unlock BL in fastboot nothing really happened apart from
<Bootloader > Unlock phone requested
OKAY [15.725s]
finished. total time: 15.725
Then restared approx every 10 min or so till battry went flat and phone being dead untill i reseted it via pin

Zeemanv2 said:
@Zenith Thank you for your wonderful suggestion i will do as u say. bt one big noob ques- Do i have to dload a ftf file to flash to stock cant i use my backup or someyhing from it to restore?
Click to expand...
Click to collapse
Yes, you have to download the ftf file.
Use this one.
and don't use the latest version of Flashtool, use the "0.9.18.5" version.

@Zenith Thanks bro bt my model is C5302 will it be compatible?
And i just dloded 0.9.18.6 version. its not latest 0.9.19.0 ver is latest.
So do i have to dload again? (connection limited bandwith n slow speed)

@Zenith Sorry bro for bugging you again n again bt u r the only person who showed some intrest in this post and helping me.
Btw ive founded this"https://drive.google.com/file/d/0B-mh6JO-ztBfaGZ6UE1QanFzRTg/edit?usp=sharing" C5302 Indian generic 12.1.A.1.201 [FTF] Is it better?

Zeemanv2 said:
@Zenith Thanks bro bt my model is C5302 will it be compatible?
And i just dloded 0.9.18.6 version. its not latest 0.9.19.0 ver is latest.
So do i have to dload again? (connection limited bandwith n slow speed)
Click to expand...
Click to collapse
You should flash ftf specified for C5302 then.
Download the C5302 variant that you prefer from here.
And try flashing with the Flashtool you have. If it doesn't work properly, then uninstall it, and install the 0.9.18.5 version.
Some members including me faced some problems on the next 2 versions of flashtool. So yeah..
---------- Post added at 01:26 AM ---------- Previous post was at 01:24 AM ----------
Zeemanv2 said:
@Zenith Sorry bro for bugging you again n again bt u r the only person who showed some intrest in this post and helping me.
Btw ive founded this"https://drive.google.com/file/d/0B-mh6JO-ztBfaGZ6UE1QanFzRTg/edit?usp=sharing" C5302 Indian generic 12.1.A.1.201 [FTF] Is it better?
Click to expand...
Click to collapse
It's okay
And as I have a different model, I can't actually assure you that it works or not.
So try and see what happens.

Thanks bro will surely let u know.

Zeemanv2 said:
@Zenith Sorry bro for bugging you again n again bt u r the only person who showed some intrest in this post and helping me.
Btw ive founded this"https://drive.google.com/file/d/0B-mh6JO-ztBfaGZ6UE1QanFzRTg/edit?usp=sharing" C5302 Indian generic 12.1.A.1.201 [FTF] Is it better?
Click to expand...
Click to collapse
Even you can flash C5303 ftf on C5302. I personally use Singapore variant .207. It has got least bugs and it is fast and much bloatware free.
P.S. Dont flash .201 it has got a lot of bugs.

Root, bootloader and returning a phone to sony

I'm having problems with the camera on my Z3C, so I'm planning on returning it to Sony for repairs. I'm aware that unlocking the bootloader reduces the quality of the camera, and this phone has had the bootloader unlocked to root it, but I'm pretty sure I've taken the right steps to restore the DRM keys and the phones back in factory condition, I'm just hoping someone can confirm I haven't missed something.
The phone was rooted originally using this guide http://forum.xda-developers.com/z3-compact/general/how-to-root-backup-drm-keys-t3013343 . After rooting, the camera was still working fine, so don't think that was the problem.
I kept the DRM key backups generated by TA-restore. I have since restored those (just in case) and used sony companion to completely reset the phone. I understand that also gets rid of the root (superSU is definitely gone). This post http://forum.xda-developers.com/showpost.php?p=55920017&postcount=155 suggests you can check your DRM keys through the security bit of the service menu, and all eight of them say [key OK] [active], so I'm hoping those are ok to. I'm also assuming that as the DRM keys appear to be there the bootloader must be locked.
Is there anything I'm missing that Sony can make a fuss about when I return it? I've searched to try to make sure I've got everything, but I'm an amateur at this so I might well have misunderstood something. Don't want this costing me money!
Thanks for any help.

Hello
Can i return it to sony if the back is broken?

xperia, TA, keys

hi guys
I have a sony xperia xz2. Stock rom is on it.
I have wonderings about the TA partition. Im intented to use lineageos, to be a bit an ungafamnted phone. In the idea, I saw lately that unblock bootloader removes the TA keys (not partition?)
I unlocked it, but :
I still have the xperia stock rom
I had a message at startup saying bootloader is corrupted, but it starts stock rom anyway
in the "phone hidden menu", "suntory bloobs" is the only thing saying "error"
I never flashed anything on it yet.
I'd like to know :
is it possible to backup keys, in a way I dont see how unlock bootloader may wipe keys (as files on a specific partition?)?
what do I lose by going to LineageOS (except more privacy) regarding features/components
if it's possible to refresh to get new keys or regenerate one (with xperia companion?)
how could I check that keys are still alive (I dndt flashed anything), to backup them?
are they some users whom can describe if loss of keys are really shame or it's just a secondary issue?
thank you for feedback and answers