Database Develop

efs folder

Hi all,
Just trying to find out where the efs folder is on xperia z c6602. I used root explorer but do not see it. I just want to make a back up of it. Thanks

This is a folder created by the rooting method. At the end it is deleted automatically. You don't need it.
Sent from my Xperia Z using XDA premium.

Dreiundachzig said:
This is a folder created by the rooting method. At the end it is deleted automatically. You don't need it.
Sent from my Xperia Z using XDA premium.
Click to expand...
Click to collapse
So I don't have to worry about losing my imei number flashing roms?

That info is contained in the TA partition. For a backup go here http://forum.xda-developers.com/showthread.php?p=41763438
Sent from my C6603 using xda app-developers app

shoey63 said:
That info is contained in the TA partition. For a backup go here http://forum.xda-developers.com/showthread.php?p=41763438
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
So just to be clear, I already did a back up of my ta partition so my era folder/imei number is saved? If any problems,just do a restore of my ta partition?

Yes your vital information is now safe. If you performed TA back up before unlocking bootloader your DRM keys (needed for Bravia engine) are also backed up. So you can now unlock bootloader and flash ROMs, safe in the knowledge that you can go back to stock and restore TA (which will also relock bootloader), so it will be as it was originally.
Sent from my C6603 using xda app-developers app

shoey63 said:
Yes your vital information is now safe. If you performed TA back up before unlocking bootloader your DRM keys (needed for Bravia engine) are also backed up. So you can now unlock bootloader and flash ROMs, safe in the knowledge that you can go back to stock and restore TA (which will also relock bootloader), so it will be as it was originally.
I'mSent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
Thanks. I just wanted to be sure cuz I flashed a Rom on my gsm nexus s and lost my imei number. Don't want that problem again.

Xperia Z DRM keys back?

So I never wanted to unlock my bootloader, because of Gracenote especially, idc about BE2 , but I installed a custom ROM the other day, existens i1 Honami, but I got stuck in a bootloop.
I had a nandroid backup but it was done from CWM, and the one was TWRP, so I was kind of screwed. I installed other zips to get cwm, but CWM wouldnt launch, I would get a black screeen, Even dual recoveries, TWRP would work, but not CWM.
Then I was forced to unlock bootloader to use fastboot to flash the boot img, after which I managed to restore my nandroid.
BUT i totally forgot that I will lose all my data, and DRM keys forever :/ *BANGS HEAD*
But apparently its working right now after the backup, is it normal? Bootloader is relocked btw
And is there any easier way to solve the situation right there?

Bump, come on someone answer, I thought this forum was alive

No way to get DRM keys back.

I remember when I was unlocking my bootloader I backed up my DRM keys with the Backup TA tool......Could you use my backup file??!
Sent from my C6606 using xda premium

Please do not use other's TA backup file!!!!
You will brick your phone as this has been confirmed.
You can only use back your own TA backup. If you did not do it before you unlocked, your DRM key is losts no matter whether you relock your bootloader subsequently.

pitbull292006 said:
I remember when I was unlocking my bootloader I backed up my DRM keys with the Backup TA tool......Could you use my backup file??!
Sent from my C6606 using xda premium
Click to expand...
Click to collapse
Only if he doesn't ever want to use his phone again.
Technically there shouldn't be any problem transferring DRM keys between devices, but we must first figure out how they are stored in the TA partition, since copying that entire partition changes some essential data rendering the device unbootable.

newtbie said:
Please do not use other's TA backup file!!!!
You will brick your phone as this has been confirmed.
You can only use back your own TA backup. If you did not do it before you unlocked, your DRM key is losts no matter whether you relock your bootloader subsequently.
Click to expand...
Click to collapse
Calm down there weirdo......I simply asked a simple question, which only required a simple answer
Sent from my C6606 using xda premium

pitbull292006 said:
Calm down there weirdo......I simply asked a simple question, which only required a simple answer
Sent from my C6606 using xda premium
Click to expand...
Click to collapse
He was right to issue a warning. Flashing somebody else's TA partition will cause an unrecoverable hard brick.
Sent from my C6603 using Tapatalk 2

If I didn't have my DRM keys, I wouldn't be able to use Gracenote, is that right?

TrackID? You should still be able to use it without issue. It has become a public application in Google Play now, not limiting to Sony phones.
I'm wild guessing that the retrieval of music info from the WALKMAN app may fail.
You can try out for yourself since you unlocked your bootloader.
---------- Post added at 01:23 AM ---------- Previous post was at 01:21 AM ----------
kingvortex said:
He was right to issue a warning. Flashing somebody else's TA partition will cause an unrecoverable hard brick.
Sent from my C6603 using Tapatalk 2
Click to expand...
Click to collapse
The problem with some users over here is they gave wrong advice and end up causing someone's misery. Afterall we are helping one another to resolve our issues or to prevent things from going haywire, don't you think so?

I've lost DRM keys and Camera don't working right now. Any way for fix camera?

kartal172 said:
I've lost DRM keys and Camera don't working right now. Any way for fix camera?
Click to expand...
Click to collapse
dont know. I lost mine to.
but i have been trying last 10 days to extract download_package.bin which is ota update for my phone if it contain cert.rsa for my Hardware Unique Key Then I m quiet sure that creating meta-inf file using that key will get us back DRM keys.
Waiting Any PRO or thread to guide us.

As far as i know it's impossible if you didn't made ta backup before unlocking your bootloader.

O have a ta backup and im on existenz and doomkernel is it possible to restore my ta now? And still have the benifits of a unlocked bootloader?
Sent from my C6603 using xda app-developers app

demon2112 said:
O have a ta backup and im on existenz and doomkernel is it possible to restore my ta now? And still have the benifits of a unlocked bootloader?
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
No. If you restore your TA backup while running a custom kernel, it will relock your bootloader and soft brick your phone.
Sent from my C6603 using Tapatalk

kingvortex said:
No. If you restore your TA backup while running a custom kernel, it will relock your bootloader and soft brick your phone.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
And.on a stock kernel with custom rom then?
Sent from my C6603 using xda app-developers app

kingvortex said:
No. If you restore your TA backup while running a custom kernel, it will relock your bootloader and soft brick your phone.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
demon2112 said:
And.on a stock kernel with custom rom then?
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
It would interesst me too

gripfly said:
It would interesst me too
Click to expand...
Click to collapse
If you relock your bootloader by restoring a TA backup while on a stock unmodified kernel then nothing bad should happen.
This limits you to using only stock based roms, however as CM/AOSP/AOKP based roms require a custom kernel and therefore an unlocked bootloader.
Sent from my C6603 using Tapatalk

kingvortex said:
If you relock your bootloader by restoring a TA backup while on a stock unmodified kernel then nothing bad should happen.
This limits you to using only stock based roms, however as CM/AOSP/AOKP based roms require a custom kernel and therefore an unlocked bootloader.
Sent from my C6603 using Tapatalk
Click to expand...
Click to collapse
So for the hole ''flash history'' the Kernel is always that important thing we have to give a look on it? The other part of a ROM are more or less not important?
So when I have a unlocked device with stock kernel and stock based custom ROM I can restore the TA without any problems?

Is there a way to check the drm keys, if they are realy there?and a way to check if be2 works? (build prop line) or something
Sent from my C6603 using xda app-developers app

[Q] Relocking Bootloader on Stock Rom with TA Restore

Hi guys
I'm pretty new to the XZ and just wanted to clarify something before I go ahead and flash a ROM.
I have backed up my TA Partition using TA-Backup Tool and have rooted my device.
I am about to install Recovery and Unlock the bootloader, all pretty straight forward from what I've read so far :laugh:
My only question so far is, if / when I want to relock the bootloader can I simply do this using the "restore" option within TA-Backup Tool (providing I am on a Stock ROM), or do I need to Relock using Flashtool and then restore the TA partition?
Thanks
G

Just use ta backup to relock that will flash the ta partition you have backed up to a unlocked status with drm keys
Sent from my C6603 using xda premium

Maddhouse said:
Just use ta backup to relock that will flash the ta partition you have backed up to a unlocked status with drm keys
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
Brilliant!! I'm assuming I can still do this even if the stock ROM has a Recovery such as CWM on it?

Yes but you need to remember what state you backed your phone's ta up with otherwise m5 key won't match
Sent from my C6603 using xda premium

xperia z
Maddhouse said:
Yes but you need to remember what state you backed your phone's ta up with otherwise m5 key won't match
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
hello what is a m5 key also im wondering how to get back to stock as i have unlocked bootloader on cyanogenmod 11 but i do wish to go back to stock only if the bravia engine and all features work. i have backed up my drm keys just need to figure out how do i restore and what process cant find anything on it
thanks

[Q] Anyway to Unlock Bootloader and keep all data?

Hey all, I am having an Xperia Z C6603. Wondering if there is anyway of unlocking the bootloader and keeping all the data I currently have.
I have already rooted my phone and installed TWRP. Still using stock ROM
Any help or advice is appreciated.
Thank you.

Follow sonys unlock guide where you get you unlock code from using the command prompt way, just remember to take ta backup
Sent from my C6603 using XDA Premium 4 mobile app

First time you unlock, no. It is not posible to keep your DATA partition.
Subsequents tries using flashtools, it will not erase anything.
So the solution is to make a NANDROID backup, unlock the bootloader, and then restore back
Sent from my SGP321 using xda app-developers app

[Q] Reverting from CM

Hi,
I have the latest stable CM installed on my XZ, but I miss the Sony ROM, so I thought I'd revert back, though I'm a little unsure about how to so it. Before unlocking the boot loader and installing CM, I rooted the phone and made a backup. My question is;
Can I revert back by doing this:
1. Booting into flashmode, wiping the cache
2. Choose to reinstall my back-up file
3. Relock boot loader in flashtool (if necessary, it was locked when I backed up)
4. "Repair phone" in Sony update service
And then be back to how it was before?

Seek and you shall find. Or look at the stickies!
http://forum.xda-developers.com/showthread.php?t=2275632

Thank you!
But that doesn't really answer my question(s), and as they were very specific in nature, a simple "yes" would be sufficient, or a "no"m, accompanied by the aforementioned links. ^^
I'm new at this, so that post has a lot of information... That's why I asked in a separate post.

You can just flash stock rom with flashtool. You don't need to relock unless u backed up your ta partition and you want to have bravia engine and updates.
Sent from my Xperia Z using XDA Premium 4 mobile app.

Thanks, but can I do it the way I wrote above? Because if so, I will.

You can just flash stock rom with flashtool. You don't need to relock unless u backed up your ta partition and you want to have bravia engine and updates.
Sent from my Xperia Z using XDA Premium 4 mobile app.
Click to expand...
Click to collapse
I was wondering if it was possible somehow. I backed up the TA-Partition and I defenitly want Bravia Engine back. How should i do this?

Dreiundachzig said:
You can just flash stock rom with flashtool. You don't need to relock unless u backed up your ta partition and you want to have bravia engine and updates.
Sent from my Xperia Z using XDA Premium 4 mobile app.
Click to expand...
Click to collapse
Since it's so hard to get a reply regarding my original post, I'll ask it like this;
Can I flash an official sony rom (.ftf) over my CM10.2? If so, can I just relock the bootloader through flashtool as well to get back BE2?

The key to get BE 2 working again and have fully restored DRM keys is to restore the backup of the TA partition that you should have taken before unlocking the bootloader. Flashing stock FTF and just relocking bootloader won't do the job
Neither will a CWM restore.
Sent from my C6603 using xda app-developers app

I made the backup in cwm before I unlocked the bootloader, is that not usable to get it back? Is there any other way?

Unfortunately, CWM doesn't backup Trim Area (TA).In your case it seems Sony DRM keys are lost forever :thumbdown:
Sent from my C6603 using xda app-developers app

I see. Oh well. BTW, I unlocked the boot loader once before, but then I relocked it without making any changes. Did I lose BE then, or not before I installed CM? And what other than BE will I have lost? :/

roanmy said:
I see. Oh well. BTW, I unlocked the boot loader once before, but then I relocked it without making any changes. Did I lose BE then, or not before I installed CM? And what other than BE will I have lost? :/
Click to expand...
Click to collapse
Yes you loosed it. If you unlock you booloader you loose the keys. That is the reason why you have to make a TA backup before unlocking.
Your warranty you loose also but I think you should know that