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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.
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Click to collapse
jjpro45 said:
I did that and it worked
Tapatalk
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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?

warranty and bootloader status

hi, my z1 has a broken vibration motor. My phone is in warranty so i want to send it to repair. my bootloader is unlocked but i can re-lock it and i also have ta partition saved.
so can i send the phone without re-lock the ottloader or can i have problem with warranty?
if i have to relock it, can i relock it simply with flashtool o r i have to re-flash the ta-partition?

fer2503 said:
hi, my z1 has a broken vibration motor. My phone is in warranty so i want to send it to repair. my bootloader is unlocked but i can re-lock it and i also have ta partition saved.
so can i send the phone without re-lock the ottloader or can i have problem with warranty?
if i have to relock it, can i relock it simply with flashtool o r i have to re-flash the ta-partition?
Click to expand...
Click to collapse
Flash full ftf and restore ta partition to be sure.

mischa_martin said:
Flash full ftf and restore ta partition to be sure.
Click to expand...
Click to collapse
Thanks, i want to ask If they can change my display with a new One bacause i have One of the first unit that have bad colours

fer2503 said:
Thanks, i want to ask If they can change my display with a new One bacause i have One of the first unit that have bad colours
Click to expand...
Click to collapse
I'd give u a tip bro
Back up your current TA too with BL unlocked and save it in your pc, then restore your ta which is made before the first time u unlock bl, then flash a stock ftf and u go to sony.
When u get your phone back, get restore your ta from unlocked bootloader again, then u immediately have your phone unlocked again

KWOKSFUNG said:
I'd give u a tip bro
Back up your current TA too with BL unlocked and save it in your pc, then restore your ta which is made before the first time u unlock bl, then flash a stock ftf and u go to sony.
When u get your phone back, get restore your ta from unlocked bootloader again, then u immediately have your phone unlocked again
Click to expand...
Click to collapse
So do you think that is better a ta of unlocked bootloader? I can unlock it without problem

fer2503 said:
So do you think that is better a ta of unlocked bootloader? I can unlock it without problem
Click to expand...
Click to collapse
u may unlock it yourself again, it will work as u expect but this way of unlock wipe your data and would take a bit more time
using the ta trick wont wipe it and it just takes 2 second, u dont have to type the unlock code bla bla bla

fer2503 said:
Thanks, i want to ask If they can change my display with a new One bacause i have One of the first unit that have bad colours
Click to expand...
Click to collapse
just mention the issue and ask for a replacement. I got mine replaced 4 times.

Wolfmachine said:
just mention the issue and ask for a replacement. I got mine replaced 4 times.
Click to expand...
Click to collapse
what issue? the washed out colors?

sim card not valid after flash

I was trying flash rom 4.2.2 and i checked "simlock.ta" option then my phone note sim card not valid and lose some funtion like camera but i can fix by install restore drm key funtion in here:
http://forum.xda-developers.com/crossdevice-dev/sony/xperia-z1-z2-z3-series-devices-drm-t2930672
but i cant solve sim card not valid because i dont have file TA backup.
And can i use other phone's file TA backup for my phone?
Thanks for help!

truyennguyends said:
I was trying flash rom 4.2.2 and i checked "simlock.ta" option then my phone note sim card not valid and lose some funtion like camera but i can fix by install restore drm key funtion in here:
http://forum.xda-developers.com/crossdevice-dev/sony/xperia-z1-z2-z3-series-devices-drm-t2930672
but i cant solve sim card not valid because i dont have file TA backup.
And can i use other phone's file TA backup for my phone?
Thanks for help!
Click to expand...
Click to collapse
Is your bootloader unlocked? Is your phone C6902? Why in the world would you want to flash antiquated 4.2.2, especially if your bootloader is unlocked. The unlocking guide specifically states you have to be at least on 4.3 in order not to lose camera. If your phone is C6902 and you flashed C6903, you have a wrong baseband.
No. You can't use another phone's TA backup, unless you want to brick your phone.

optimumpro said:
Is your bootloader unlocked? Is your phone C6902? Why in the world would you want to flash antiquated 4.2.2, especially if your bootloader is unlocked. The unlocking guide specifically states you have to be at least on 4.3 in order not to lose camera. If your phone is C6902 and you flashed C6903, you have a wrong baseband.
No. You can't use another phone's TA backup, unless you want to brick your phone.
Click to expand...
Click to collapse
My phone is SOL23 and bootloader in locked but i check bootloader status is uknow. I flashed rom stock but notthing change.
This post said i can solve my problem with file TA backup
http://forum.xda-developers.com/z3-compact/help/rooting-status-unknown-sim-card-camera-t3279419
But i dont have.
Ty :good:

truyennguyends said:
My phone is SOL23 and bootloader in locked but i check bootloader status is uknow. I flashed rom stock but notthing change.
This post said i can solve my problem with file TA backup
http://forum.xda-developers.com/z3-compact/help/rooting-status-unknown-sim-card-camera-t3279419
But i dont have.
Ty :good:
Click to expand...
Click to collapse
I am not familiar with SOL23, but if your bootloader is locked, there is no permanent damage. You just need to re-flash the original firmware for SOL23. Try to repair it with Sony flashtool...
You have to restore your phone to original, then, if you want to unlock bootloader, do a TA backup, so that you can restore DRM function in case you would want to relock. If you unlock without backing up, you will lose your DRM key forever...

DRM keys backup confusion

Hello, after my patience ran out with google play services batter drain issues i have decided to try out moding and i think i messed up DRM recovery part.
I used https://forum.xda-developers.com/z3-compact/general/how-to-root-backup-drm-keys-t3013343 this as a guide.
Things i have done so far in order:
1. flashed 4.4
2. rooted
3. made DRM keys backup
4. unlocked bootloader
5. installed twrp recovery
6. installed this https://forum.xda-developers.com/z3-compact/development/rom-aoxp-rom-v1-t3478863 rom
7. recovered DRM TA zip thing.
Now my problem is, my bootloader is locked, so i guess recovery procedure went ok, but camera perfomance is as awful as without drm keys. Where did i go wrong? What can i do to fix my camera perfomance?
p.s. i am really sorry for my english as it is not my native langue thanks in advice for help.

You don't lock the bootloader when you restore the TA backup it actually locks the bootloader,so try unlocking it again and then restoring the TA backup

Dinkec27 said:
You don't lock the bootloader when you restore the TA backup it actually locks the bootloader,so try unlocking it again and then restoring the TA backup
Click to expand...
Click to collapse
you dont lock it actually locks
that is what i understood, could you be more clear please?

Teraman said:
you dont lock it actually locks
that is what i understood, could you be more clear please?
Click to expand...
Click to collapse
Sorry.
What I meant to say is,when you restore a TA backup from an unlocked bootloader state,it locks the bootloader when you restore it.
So what I am saying is you should unlock the bootloader again,and restore the TA backup as it will lock the bootloader again and should restore camera quality.
Clear now?

Dinkec27 said:
Sorry.
What I meant to say is,when you restore a TA backup from an unlocked bootloader state,it locks the bootloader when you restore it.
So what I am saying is you should unlock the bootloader again,and restore the TA backup as it will lock the bootloader again and should restore camera quality.
Clear now?
Click to expand...
Click to collapse
yes, but one thing. Why do i need to restore twice to get back camera quality?
Thank you a lot!

Teraman said:
yes, but one thing. Why do i need to restore twice to get back camera quality?
Thank you a lot!
Click to expand...
Click to collapse
I dunno tbh I never restored a TA backup since I was an idiot and forgot to back up TA when I was going to unlock my bootloader.
Try it and tell me how it went! Good luck!

No need to restore it twice! Just be sure that you are on stock kernel before you restrore TA.img
Savest way is to flash Kernel+Bootdelivery out of normal FW tft using flashmode (not fastboot !)
Then restore TA.img with Backup tool.
Reboot and done... And Camera is back....
As an alternativre you can flash DRM fix as well... There is also an other projekt running to mount your TA.img from another location.
But this is not yet tested that much... Stay with locked BL and TA - Or with UB and DRM fix.
DRM fix
https://forum.xda-developers.com/crossdevice-dev/sony/xperia-z1-z2-z3-series-devices-drm-t2930672
Sometimes its needed to delete following folders (with all including files) to reset DRM stuff (root needed)
/data/credmgr
/data/drm
/data/mediadrm
Don't be afraid of loosing something - Those folders and files will be created automaticly new on boot....
btw: Why you unlocked your bootloader? For Root we have 2 ways to do it without Unlocking bootloader...
Anyway -if you have an TA backup you are save actually...

fluffi444 said:
No need to restore it twice! Just be sure that you are on stock kernel before you restrore TA.img
Savest way is to flash Kernel+Bootdelivery out of normal FW tft using flashmode (not fastboot !)
Then restore TA.img with Backup tool.
Reboot and done... And Camera is back....
As an alternativre you can flash DRM fix as well... There is also an other projekt running to mount your TA.img from another location.
But this is not yet tested that much... Stay with locked BL and TA - Or with UB and DRM fix.
DRM fix
https://forum.xda-developers.com/crossdevice-dev/sony/xperia-z1-z2-z3-series-devices-drm-t2930672
Sometimes its needed to delete following folders (with all including files) to reset DRM stuff (root needed)
/data/credmgr
/data/drm
/data/mediadrm
Don't be afraid of loosing something - Those folders and files will be created automaticly new on boot....
btw: Why you unlocked your bootloader? For Root we have 2 ways to do it without Unlocking bootloader...
Anyway -if you have an TA backup you are save actually...
Click to expand...
Click to collapse
to install twrp, because in guide i read it needs unlocked bootloader and i needed twrp for best battery rom i found.

Teraman said:
to install twrp, because in guide i read it needs unlocked bootloader and i needed twrp for best battery rom i found.
Click to expand...
Click to collapse
There are also two ways of using TWRP:
One is to flash twrp.img onto former FOTA partition. For this you would need UB... This works only with new bootloaders (LA3.0_M_3 from FW .291 is prefered - This bootloader will be installed if you flash full FW 291 or only bootdelivery and kernel in flashtool)
https://forum.xda-developers.com/z3-compact/general/d5803-z3c-aries-twrp3-0-t3543113
But the other method is putting TWRP files to /system/etc/mm_twrp_recovery on SYSTEM partition...
This works also with LB!
https://forum.xda-developers.com/z3-compact/general/recovery-root-mm-575-lb-t3418714
EDIT
Third one is to have recovery build into kernel...
Just to be complete.. ?

How can I relock my bootloader

Hi guy I want to close again on my bootloader
But I can't fix this problem
I want to relock my device
I try to build stock rom on it
But it didn't work please help me

Pakodogan said:
Hi guy I want to close again on my bootloader
But I can't fix this problem
I want to relock my device
I try to build stock rom on it
But it didn't work please help me
Click to expand...
Click to collapse
I don't believe there's a single tutorial on how to unlock that doesn't mention this is a one way process and it can't be recovered.

Didgesteve said:
I don't believe there's a single tutorial on how to unlock that doesn't mention this is a one way process and it can't be recovered.
Click to expand...
Click to collapse
Can you tell me how can I do
Because I don't find anyway to fix
I try one option
First I flash stock Rom on flashtool
Bootloader still open
I guess Drm key is lost
Thats really bad photo is not working
Bla Bla....

Unfortunately, as of right now, there's no way to relock the bootloader, and your DRM keys are lost forever.
You can try the custom kernel in the ROMs.. section, which includes a DRM fix, which maybe can restore some of the functionality of the camera.

BetaLyte said:
Unfortunately, as of right now, there's no way to relock the bootloader, and your DRM keys are lost forever.
You can try the custom kernel in the ROMs.. section, which includes a DRM fix, which maybe can restore some of the functionality of the camera.
Click to expand...
Click to collapse
Ooo really =( so please could you suggest me
Which one should I try?

A lot sure has changed since my previous phone (Z5 compact). Back then, simply flashing stock firmware automatically relocks the bootloader.
I'm surprised that's no longer the case.
Guess we'll continue to see little to no development of this phone until major breakthroughs.

Pakodogan said:
Ooo really =( so please could you suggest me
Which one should I try?
Click to expand...
Click to collapse
I see you tried the DRM fix already. Try the boot instead from here: https://forum.xda-developers.com/xp...compact-16-january-2018-t3736068/post75377373

Does
fastboot flashing lock
or
fastboot flashing lock_critical
not work anymore?

Defier525 said:
Does
fastboot flashing lock
or
fastboot flashing lock_critical
not work anymore?
Click to expand...
Click to collapse
There is no way to re-lock your bootloader once you have deleted the TA partiton. There are so many warnings on your way to unlocking that tell you this repeatedly.
You can use sToRm//'s Sony Xperia XZ Premium TWRP + KERNEL + ROOT + DRM fix/restore
app to enable your DRM again, then you can take pictures and everything is as before.