Database Develop

[Q] Can I Flash STOCK after CM (if I wish to sell?)

I'm kinda worn out by the slow release of updates and would like to go CM.
Having locked bootloader, I am unclear from reading/searching if I can, say in a few months, go back to stock (flash using FlashTool?) so I can sell the phone before I upgrade?
Thanks for any tips or RTFM links. :good:

You can't flash CM with a locked bootloader. CM needs a modified kernel to work and with a LB you can't do that. But to answer your question, yes you can. Simply wipe everything before flashing with flashtool and you are good to go.
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ckyy said:
You can't flash CM with a locked bootloader. CM needs a modified kernel to work and with a LB you can't do that. But to answer your question, yes you can. Simply wipe everything before flashing with flashtool and you are good to go.
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Click to expand...
Click to collapse
So, in my case I need to
1. Unlock Bootloader (which will erase everything, including SD card)
2. Flash CM
3. Enjoy until time comes to sell device
4. Wipe data/cache/factory reset
5. FlashTool the latest STOCK I find
Is it accurate to assume that after step 5, the only difference between my (current) stock device and then will be unlocked bootloader (with zero impact for guy who buys after me) ? As much as I want to have KitKat, I do not want the buyer to be funked with something not matching his/her needs or impaired somehow...
Thank you for the confirmation :good:

Nexu$ said:
So, in my case I need to
1. Unlock Bootloader (which will erase everything, including SD card)
2. Flash CM
3. Enjoy until time comes to sell device
4. Wipe data/cache/factory reset
5. FlashTool the latest STOCK I find
Is it accurate to assume that after step 5, the only difference between my (current) stock device and then will be unlocked bootloader (with zero impact for guy who buys after me) ? As much as I want to have KitKat, I do not want the buyer to be funked with something not matching his/her needs or impaired somehow...
Thank you for the confirmation :good:
Click to expand...
Click to collapse
After step 5 you can relock your BL by reflashing your TA partition (which you should backup before step 1) if i'm not mistaken.

Step 1) backup TA partition.
Step 2) unlock bootloader.
Step 3) flash cm.
Use as you wish.
When you want to sell device.
Step 1) Restore TA partition.
TA restore will block to boot with modified boot image.
Step 3) flash stock fw via flashtool. Do not select or unselect anything in flashtool.
That will flash full device including sdcard.
Sent from my C6603 using Tapatalk

ckyy said:
After step 5 you can relock your BL by reflashing your TA partition (which you should backup before step 1) if i'm not mistaken.
Click to expand...
Click to collapse
What is the risk of not reflashing the TA partition and flashing STOCK onto unlocked BL? Not receiving OTA updates or something more complex?

Nexu$ said:
What is the risk of not reflashing the TA partition and flashing STOCK onto unlocked BL? Not receiving OTA updates or something more complex?
Click to expand...
Click to collapse
You lose your DRM keys. People say bravia engine stops working on photos and some stuff with the music info downloading with walkman. Unsure about OTA updates, as i have never done those. I flash FTF as soon as they get available.
Other than that, there is nothing different.

Nexu$ said:
So, in my case I need to
1. Unlock Bootloader (which will erase everything, including SD card)
2. Flash CM
3. Enjoy until time comes to sell device
4. Wipe data/cache/factory reset
5. FlashTool the latest STOCK I find
Is it accurate to assume that after step 5, the only difference between my (current) stock device and then will be unlocked bootloader (with zero impact for guy who buys after me) ? As much as I want to have KitKat, I do not want the buyer to be funked with something not matching his/her needs or impaired somehow...
Thank you for the confirmation :good:
Click to expand...
Click to collapse
Jst one tip remove SD card before unlocking so nothing gets deleted
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Tommy-Geenexus said:
Jst one tip remove SD card before unlocking so nothing gets deleted
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Click to expand...
Click to collapse
The SD card shouldn't get wiped when unlocking but the internal storage does.
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Thank you to all who pitched in - I searched the fora for "TA partition" and discovered that [NUT has written a wonderful thread for people who have my question, I wish I knew about the TA partition importance and searched earlier.
For those who follow or need the same thing, thread is here: http://forum.xda-developers.com/showthread.php?t=2458530
:good::good::good:

Rooting is it really worth it?

Hi I am new to super smart phones like the z1, I'm the type of person to want to hack things and make them beret but I'm also the type of person everything goes wrong for. I want to know if it really worth rooting my phone what I would gane and if it worth the risk,? Thanks
Sent from my C6903 using xda app-developers app

Some of the Benefits of Rooting:
1. Easily backup your apps + data to your Ext sd card (no PC required)
2. Remove bloatware (pre-installed carrier apps that you cant remove without root)
3. Full customization of your xperia z1. Examples: change your navigation bar layout, add 3 dot menu bar, customize your status bar, assign different actions to your hardware buttons, increase/decrease height of your navigation bar etc
4.Flash custom ROMs and kernels (if your bootloader unlocked)

5.Overclokking.
6.Improve Battery life with Frequencies and Governors.
7.Full access to your System phone.
8.Modified build.prop to make uncompatible, compatible apps.
9...and more...

RushNReady said:
Hi I am new to super smart phones like the z1, I'm the type of person to want to hack things and make them beret but I'm also the type of person everything goes wrong for. I want to know if it really worth rooting my phone what I would gane and if it worth the risk,? Thanks
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
anyone who is asking this question shouldn't mind if he needs root - you need root ^^
there should be no problems if you read the instructions and immediatly ask questions when there are problems

ruinkhan said:
Some of the Benefits of Rooting:
1. Easily backup your apps + data to your Ext sd card (no PC required)
2. Remove bloatware (pre-installed carrier apps that you cant remove without root)
3. Full customization of your xperia z1. Examples: change your navigation bar layout, add 3 dot menu bar, customize your status bar, assign different actions to your hardware buttons, increase/decrease height of your navigation bar etc
4.Flash custom ROMs and kernels (if your bootloader unlocked)
Click to expand...
Click to collapse
So if I root my phone will all the stuff I have on there already stays there or does it wipe it. What happens when new updates come out? My warrenty stops to doesn't it? I would have to flash a stock rom if i have any problems? so the phones functions all work the same Ie connecting a ps3 controler? Just worry I'm going to screw it up or loose things to gain things

RushNReady said:
So if I root my phone will all the stuff I have on there already stays there or does it wipe it. What happens when new updates come out? My warrenty stops to doesn't it? I would have to flash a stock rom if i have any problems? so the phones functions all work the same Ie connecting a ps3 controler? Just worry I'm going to screw it up or loose things to gain things
Click to expand...
Click to collapse
Unlocking bootloader might do that, but not root.

So rooting my phone will give me more control and customisation. Still keeping installed apps and game progress? Un locking bootloader will change everything and loose everything?

RushNReady said:
So rooting my phone will give me more control and customisation. Still keeping installed apps and game progress? Un locking bootloader will change everything and loose everything?
Click to expand...
Click to collapse
Exactly.

First thing I do when I get a new phone. Root the thing. Grab titanium, get CRT an I'm happy again. . Yea its worth it m8. 100%
Sent from my C6903 using XDA Premium 4 mobile app

someone could confirm whether the BIONZ processing is lost??
thank you

yanbee said:
someone could confirm whether the BIONZ processing is lost??
thank you
Click to expand...
Click to collapse
You don't loose anything when you root the phone.
When you unlock the bootloader than yes you will loose a few features such as Bionz and also the Xperia Throw.
Here is a video that should clarify a few things for you:

Just2Cause said:
Exactly.
Click to expand...
Click to collapse
Were is the thanks button. What's the best way to root then

Sorry I mean unlocking bootloader
Enviado desde mi C6903 mediante Tapatalk

RushNReady said:
Were is the thanks button. What's the best way to root then
Click to expand...
Click to collapse
First question is what version of firmware you are on. To get a fully functional root on 4.3 firmware (with write to system ability) you need to unlock the bootloader first.
You can have a partial root on 4.3 that will still allow use of Titanium Backup or Xposed Framework. To get root you need to use Flashtool to downgrade to old 534 firmware. Than root with vroot (check out my channel for video). Than install dual recovery. Once you have root and recovery flash a prerooted rom. I would highly advise using monxdified rom.
Sent from my C6903 using Tapatalk
---------- Post added at 11:05 PM ---------- Previous post was at 11:04 PM ----------
shem2409 said:
First question is what version of firmware you are on. To get a fully functional root on 4.3 firmware (with write to system ability) you need to unlock the bootloader first.
You can have a partial root on 4.3 that will still allow use of Titanium Backup or Xposed Framework. To get root you need to use Flashtool to downgrade to old 534 firmware. Than root with vroot (check out my channel for video). Than install dual recovery. Once you have root and recovery flash a prerooted rom. I would highly advise using monxdified rom.
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse
Also there are 100 of threads that give you information on how to get root. Please read before asking the same information.
Sent from my C6903 using Tapatalk

shem2409 said:
First question is what version of firmware you are on. To get a fully functional root on 4.3 firmware (with write to system ability) you need to unlock the bootloader first.
You can have a partial root on 4.3 that will still allow use of Titanium Backup or Xposed Framework. To get root you need to use Flashtool to downgrade to old 534 firmware. Than root with vroot (check out my channel for video). Than install dual recovery. Once you have root and recovery flash a prerooted rom. I would highly advise using monxdified rom.
Sent from my C6903 using Tapatalk
---------- Post added at 11:05 PM ---------- Previous post was at 11:04 PM ----------
Also there are 100 of threads that give you information on how to get root. Please read before asking the same information.
Sent from my C6903 using Tapatalk
Click to expand...
Click to collapse
i have 4.2.2 is that what you mean by firmware ? i wanted to ask is it worth it whats the point in having a website where you can post question you want answered to then only be told not to ask any just read other peoples dont make sense

RushNReady said:
i have 4.2.2 is that what you mean by firmware ? i wanted to ask is it worth it whats the point in having a website where you can post question you want answered to then only be told not to ask any just read other peoples dont make sense
Click to expand...
Click to collapse
When you go to Settings>About Phone under Build Number you will get the firmware that you are on. To root the phone you need to downgrade to .534 firmware. This place is to ask questions, but there is a search function for a reason. When you ask the same question for 100th time you just flood the forum. Your question on why you should root has been answered. If you want to find out how to do it read on the respective threads.
Sent from my C6903 using Tapatalk

shem2409 said:
First question is what version of firmware you are on. To get a fully functional root on 4.3 firmware (with write to system ability) you need to unlock the bootloader first.
You can have a partial root on 4.3 that will still allow use of Titanium Backup or Xposed Framework. To get root you need to use Flashtool to downgrade to old 534 firmware. Than root with vroot (check out my channel for video). Than install dual recovery. Once you have root and recovery flash a prerooted rom. I would highly advise using monxdified rom.
Click to expand...
Click to collapse
I did a backup of TA partition, then I updated to 4.3 (290) and unlocked bootloader in order to flash TWRP and flash SuperSu. All was nice, except for x-reality didn`t work (which i dont care so much) but I didn't know if BIONZ camera image processor stop working too.
This is my only concern. I want to know if its possible to have unlocked bootloader and root without loosing BIONZ processor. I tried restoring TA partition while unlocked/rooted, but it became in a soft-brick which I only could solve flashing a ftf.
Thank you very much!

yanbee said:
I did a backup of TA partition, then I updated to 4.3 (290) and unlocked bootloader in order to flash TWRP and flash SuperSu. All was nice, except for x-reality didn`t work (which i dont care so much) but I didn't know if BIONZ camera image processor stop working too.
This is my only concern. I want to know if its possible to have unlocked bootloader and root without loosing BIONZ processor. I tried restoring TA partition while unlocked/rooted, but it became in a soft-brick which I only could solve flashing a ftf.
Thank you very much!
Click to expand...
Click to collapse
When you unlock the bootloader you loose the DRM keys.Technologies such as X-reality Engine or Bionz will not work with bootloader unlocked.
When you restore your TA do it on the same firmware that you did the backup on. There have been issues reported when trying to restore backup from 4.2.2. on 4.3

shem2409 said:
When you unlock the bootloader you loose the DRM keys.Technologies such as X-reality Engine or Bionz will not work with bootloader unlocked.
When you restore your TA do it on the same firmware that you did the backup on. There have been issues reported when trying to restore backup from 4.2.2. on 4.3
Click to expand...
Click to collapse
But it's possible to have a working camera without bionz working? (such it happens in 4.3 after unlocking bootloader).
I can only do TA backup in 4.2.2 (534 or 257) because are the only rooteable versions. And I only can unlock bootloader in 4.3 because it's the only version which doesn't lose camera functionality. How it's supposed to be root and restore TA in 4.3?
Thank you.

yanbee said:
But it's possible to have a working camera without bionz working? (such it happens in 4.3 after unlocking bootloader).
I can only do TA backup in 4.2.2 (534 or 257) because are the only rooteable versions. And I only can unlock bootloader in 4.3 because it's the only version which doesn't lose camera functionality. How it's supposed to be root and restore TA in 4.3?
Thank you.
Click to expand...
Click to collapse
The camera works on 4.3 when bootloader is unlocked. You are going to loose bionz and x-reality. You cannot relock the bootloader on 4.3 if you want to have a functioning root. It's either one or the other. When you restore TA you will relock the bootloader.
Sent from my C6903 using Tapatalk

How to relock bootloader without TA backups.. Android 4.3.. Please help mr

Sent from my C6903 using xda app-developers app

Nuwan75n said:
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
it is possible to lock it without a backup, is your camera not working anymore ?

You can try flashtool, BLU option tries to relock it if it's unlocked, theres a good chance you will brick your device!
Have fun
Sent from my C6903 using Tapatalk

AntiDroid said:
it is possible to lock it without a backup, is your camera not working anymore ?
Click to expand...
Click to collapse
Are you sure this is good and/or informative advice? I thought a locked bootloader not finding valid keys in the TA will refuse to ever function usefully again - no boot, no fastboot, no flashmode, nothing, totally bricked, and no way to convert it back to unlocked and get your phone back.
I would like to know if I am wrong about any of that. And... it seems that I was:
** Correction - it is Ok to relock the bootloader without having the pre-unlock data in the TA partition
** Flashing in data from any other TA partition (some other phone) seems certain to brick the phone though.

n0bleINtP said:
Are you sure this is good and/or informative advice? I thought a locked bootloader not finding valid keys in the TA will refuse to ever function usefully again - no boot, no fastboot, no flashmode, nothing, totally bricked, and no way to convert it back to unlocked and get your phone back.
I would like to know if I am wrong about any of that.
Click to expand...
Click to collapse
I've never read about those damages but I read things like the known camera bug.
I unlocked my Z1 on .290 - the Sony release which fixed the problem (4.3). I flashed a Recovery and rooted it with it and my device is working like it was with a "untouched" ROM.
That's all I know.
We could wait for a dev to answer deeper questions.

AntiDroid said:
I unlocked my Z1 on .290 - the Sony release which fixed the problem (4.3).
Click to expand...
Click to collapse
Yes this absolutely fine and is what I did with my Z1, ie do not unlock until after the 290 update is applied - you will see that advice on the Sony unlock website. However if you want a TA backup you need to do that before unlocking as the unlock process will wipe the keys, and you also need root in order to make that copy. (let me know if I am wrong about that)
My process was to root on earlier firmware, copy the TA, update to .290, then unlock. After unlocking full root on .290 is easy with a custom kernel and everything is good: unlocked, rooted *and* working camera.
But you *will* need a copy of the pre-unlock TA partition to regain any of the functions that use the DRM keys if you decide to relock the bootloader later.

It is impossible to get the DRM keys back, and there is no gain from relocking without them, all you're doing is locking down the bootloader without enabling BIONZ, etc, but you can certainly run a stock system if you want.

n0bleINtP said:
Yes this absolutely fine and is what I did with my Z1, ie do not unlock until after the 290 update is applied - you will see that advice on the Sony unlock website. However if you want a TA backup you need to do that before unlocking as the unlock process will wipe the keys, and you also need root in order to make that copy. (let me know if I am wrong about that)
My process was to root on earlier firmware, copy the TA, update to .290, then unlock. After unlocking full root on .290 is easy with a custom kernel and everything is good: unlocked, rooted *and* working camera.
But you *will* need a copy of the pre-unlock TA partition to regain any of the functions that use the DRM keys if you decide to relock the bootloader later.
Click to expand...
Click to collapse
Hello, yesterday I downgraded to rooteable 4.2.2 rom in order to backup TA partition. Once I had backup, I updated to 4.3 (290) and unlocked bootloader, then flashed recovery. With recovery was easy to flash superSu. Now I have "stock" rom with root and unlocked bootloader, but I realized that x-reality wasn't warking anymore (because of the DRM keys loss).
I tried to recover TA partition, but I caused a soft-brick, wich I only could solve flashing a 290 ftf through flashtool, but I lost root. My question is: It is possible to have root and DRM keys (TA partition restored)??
Thank you very much.

yanbee said:
Hello, yesterday I downgraded to rooteable 4.2.2 rom in order to backup TA partition. Once I had backup, I updated to 4.3 (290) and unlocked bootloader, then flashed recovery. With recovery was easy to flash superSu. Now I have "stock" rom with root and unlocked bootloader, but I realized that x-reality wasn't warking anymore (because of the DRM keys loss).
I tried to recover TA partition, but I caused a soft-brick, wich I only could solve flashing a 290 ftf through flashtool, but I lost root. My question is: It is possible to have root and DRM keys (TA partition restored)??
Thank you very much.
Click to expand...
Click to collapse
No, never.

Just2Cause said:
No, never.
Click to expand...
Click to collapse
So, apart from losing x-reality and some Sony apps functionalities (which I dont care). Do you lose something else? I heard about losing bionz processor, but camera still works, then I dont know how far this is true.
The incompatibility problem of root and restored TA partition, is because flashing recovery (which modifies kernel) or supersu.apk it self?
Thank you VERY much!

You loose bionz, but not x-reality. I unlocked my bootloader and I have x-relity enabled.
Some ROMs won't have working camera, for example: android 4.4 KitKat ported from xperia z ultra GPe, and some other ROMs.

Just2Cause said:
You loose bionz, but not x-reality. I unlocked my bootloader and I have x-relity enabled.
Some ROMs won't have working camera, for example: android 4.4 KitKat ported from xperia z ultra GPe, and some other ROMs.
Click to expand...
Click to collapse
I can see that the x-reality option is still on menu, and you can enable/disable it, but it doesn't work. Before, I could see in the first second of picture showing how x-reality improves the image (its an effect that can be seen with the naked eye), this is not happening now. By the way, its for sure that bionz stop working? How could I take pictures without it?
Thank you

yanbee said:
I can see that the x-reality option is still on menu, and you can enable/disable it, but it doesn't work. Before, I could see in the first second of picture showing how x-reality improves the image (its an effect that can be seen with the naked eye), this is not happening now. By the way, its for sure that bionz stop working? How could I take pictures without it?
Thank you
Click to expand...
Click to collapse
Not sure about bionz, but I guessed it as I had the x-relity option enabled. I can't tell if it works or not as I don't have camera (I'm using ported 4.4)
It would be nice of someone confirmed it.

Correct me if i am wrong.
Bionz is a service which improves the pictures after a shot, isn't it ?
Bionz and X-Reality are things u can't detect that easy like "oh that effect is from X-Reality" or something else.
I thought the main reason for not working cameras on other roms was that the dev's didn't apply those 4.3 changes :S

AntiDroid said:
Correct me if i am wrong.
Bionz is a service which improves the pictures after a shot, isn't it ?
Bionz and X-Reality are things u can't detect that easy like "oh that effect is from X-Reality" or something else.
I thought the main reason for not working cameras on other roms was that the dev's didn't apply those 4.3 changes :S
Click to expand...
Click to collapse
Bionz it's a image processor that includes xperia Z1, it process the pictures taken instead the cpu. I dont know if it's easy to detect if it's working or not. But in the case of x-reallity it's very simple, when you open a picture in Sony gallery app, you can see how the picture "improves" quality in the first second. It is no so evident in all pictures, but can be detected by a naked eye, as I do.
My only doubt is about bionz processor, I already know that I loss x-reality. But I want to be SURE if bionz processing is also lost. I want to have full root (with unlocked bootloader), and have bionz enabled. I dont care x-reality or Sony apps.
Thank you very much

Just2Cause said:
No, never.
Click to expand...
Click to collapse
Not true. If you have a TA backup, install .290, unlock bootloader, install a recovery, root, reflash stock boot partition, restore TA partition, you will end up with a booting, rooted, .290 installation.

Rekoil said:
Not true. If you have a TA backup, install .290, unlock bootloader, install a recovery, root, reflash stock boot partition, restore TA partition, you will end up with a booting, rooted, .290 installation.
Click to expand...
Click to collapse
Are you sure about that? :fingers-crossed:

Just2Cause said:
Are you sure about that? :fingers-crossed:
Click to expand...
Click to collapse
I did that and it worked
Sent from my iPad Air using Tapatalk

Rekoil said:
Not true. If you have a TA backup, install .290, unlock bootloader, install a recovery, root, reflash stock boot partition, restore TA partition, you will end up with a booting, rooted, .290 installation.
Click to expand...
Click to collapse
jjpro45 said:
I did that and it worked
Tapatalk
Click to expand...
Click to collapse
Thank you VERY much!!! Could someone tell me how to reflash boot partition only?? The TA partition which I must restore, could be restored in 290 if backups comes from 534?

[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.
Click to expand...
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] unlock bootloader by sony improved ?

as i was surfing on net i found this http://developer.sonymobile.com/2014/07/14/sonys-unlock-boot-loader-service-now-improved/ so my question is can we unlock boot loader directly without taking TA backup now ? i m non rooted device so any one please can confirm me ?
and small doubt again i was rooted device before 2 month that time i take TA backup on 4.3 kitkat after that i updated to 4.4 kitkat pure stock not even rooted now so can i use old TA backup now if i want to restore my drm keys or my 1st question is enough to solve my problem ?

pradatta said:
as i was surfing on net i found this http://developer.sonymobile.com/2014/07/14/sonys-unlock-boot-loader-service-now-improved/ so my question is can we unlock boot loader directly without taking TA backup now ? i m non rooted device so any one please can confirm me ?
and small doubt again i was rooted device before 2 month that time i take TA backup on 4.3 kitkat after that i updated to 4.4 kitkat pure stock not even rooted now so can i use old TA backup now if i want to restore my drm keys or my 1st question is enough to solve my problem ?
Click to expand...
Click to collapse
DRM keys are unique for your your device no matter on which firmware you backup it.
You just need to backup it one time and that's it...
Sent from my D6503 using Tapatalk

funky0308 said:
DRM keys are unique for your your device no matter on which firmware you backup it.
You just need to backup it one time and that's it...
Sent from my D6503 using Tapatalk
Click to expand...
Click to collapse
oh my friend u again helped me thanks but what about my 1st question mate ? is it now not need to take TA backup for our z1 with improved sony procedure ?

pradatta said:
oh my friend u again helped me thanks but what about my 1st question mate ? is it now not need to take TA backup for our z1 with improved sony procedure ?
Click to expand...
Click to collapse
I would recommend that you take a TA partition backup if you want to unlock the bootloader, that way it is very easy to relock and restore the DRM keys.
You have always been able to unlock without taking the TA backup, but if you have done it once, then its fine, you never need to do it again