Backup drm keys on Pie - Sony Xperia XZ2 Questions & Answers

Can it be done?

math_green20 said:
Can it be done?
Click to expand...
Click to collapse
Nope.
Neither on Oreo nor on Pie.

now that the zero day exploit is known. would it be possible to downgrade to oreo and do the root method?
there is already a pixel 2 video going around being rooted with locked bootloader. the dev said he will release the method/app soon. watch below.
https://mobile.twitter.com/Digital_Cold/status/1182045384505466885?s=19
or does our kernel on oreo not have the vulnerability?

@j4nn already nailed it, but it seems that unfortunately backing up TA prior to unlock device bl is not the trick anymore.

That's right, it seems yoshino phones (xzp/xz1/xz1c) have been the last where we could restore drm keys via TA backup from a temp-rooted locked state, to get all drm functions working again (if kernel hiding bootloader unlock has been used with it).
Unfortunately with XZ2, restore of locked TA backup and even with running kernel hiding BL unlock does not restore drm functionality.
I am afraid the same behaviour would be with any newer sony phone.

i see, wel crap.. ?.
thanks anyway for answering guys. i might consider unlocking bootloader soon then, i need that dose of AOSP + Root on my sony

BADA 187 said:
i see, wel crap.. .
thanks anyway for answering guys. i might consider unlocking bootloader soon then, i need that dose of AOSP + Root on my sony
Click to expand...
Click to collapse
If you can wait I would recommend unlocking on Q.
P did vanish less drm stuff from TA than O.
Maybe Q does the same.
It doesn't matter for the SODP based custom roms here, just for the stock rom usage.

MartinX3 said:
If you can wait I would recommend unlocking on Q.
P did vanish less drm stuff from TA than O.
Maybe Q does the same.
It doesn't matter for the SODP based custom roms here, just for the stock rom usage.
Click to expand...
Click to collapse
thanks, i will wait then indeed. got other devices to play with for now

Related

[Q]difference root with unlocked/locked bootloader

Hey guys/gals
i have a quick question.
what exactly is the difference (featurewise) when it comes to rooting with an unlocked bootloader and rooting with a locked one?
i'm pretty new to android (iOS user until last saturday), did some research today, but didn't really find much usefull information.
main reason i want to root (at least for now. i'm sure i would find more after spending more time with my xperia), is because i want to format my 64gb SD to exfat and move apps over to it.
thanks guys
edit: and no, i'm currently not thinking about getting a different theme/loader on it (this is one of the things you can only do with an unlocked one, right?)
edit2: and yes, my bootloader can be unlocked
dottore. said:
Hey guys/gals
i have a quick question.
what exactly is the difference (featurewise) when it comes to rooting with an unlocked bootloader and rooting with a locked one?
i'm pretty new to android (iOS user until last saturday), did some research today, but didn't really find much usefull information.
main reason i want to root (at least for now. i'm sure i would find more after spending more time with my xperia), is because i want to format my 64gb SD to exfat and move apps over to it.
thanks guys
Click to expand...
Click to collapse
Ok unlocked bootloaders = you lose DRM keys forever and Bravia Engine doesn't work. Relocking won't get them back. You can also overclock/underclock CPU with unlocked bootloader. You can also flash custom ROMs/kernels with unlocked bootloader.
Now with locked bootloader you can still have root but you don't lose your DRM keys. You can't flash custom ROMs/kernels or do any overclocking/underclocking.
That's all I can think of.
yeah, i read about that whole DRM thing. i don't care so much about the Bravia Engine and DRM, but i wouldn't mind it staying (first time i said that about DRM), so thats one of the main reason i didn't just went on with unlocking.
is flashing a custom kernel something more or less common when using a rooted android? could i get the things mentioned done without doing it? (i think i read moving apps only needs root, but then again: the xperia z seems to be a bit special when it comes to extSD)
thanks for the fast reply
shadowboy23 said:
Ok unlocked bootloaders = you lose DRM keys forever and Bravia Engine doesn't work. Relocking won't get them back. You can also overclock/underclock CPU with unlocked bootloader. You can also flash custom ROMs/kernels with unlocked bootloader.
Now with locked bootloader you can still have root but you don't lose your DRM keys. You can't flash custom ROMs/kernels or do any overclocking/underclocking.
That's all I can think of.
Click to expand...
Click to collapse
is flashing a custom kernel something more or less common when using a rooted android? could i get the things mentioned done without doing it?
Click to expand...
Click to collapse
Well it's up to you. You can either flash custom ROMs/kernels if you want but you will need to unlock the bootloader to do that. Locked bootloader you can only have root and that's it sad to say. But you don't have to flash a custom ROM or kernel if you have root. because you can't anyway with a locked bootloader. Having root just means you can use apps that need root access.
shadowboy23 said:
Well it's up to you. You can either flash custom ROMs/kernels if you want but you will need to unlock the bootloader to do that. Locked bootloader you can only have root and that's it sad to say.
Click to expand...
Click to collapse
ok, thanks. i think i'll stay with the locked one for now...let's see for how long

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?

Root for Z1 Compact without losing TA

Is there a way to root the Z1 Compact without losing what you do when you unlock the bootloader?
Koenig77 said:
Is there a way to root the Z1 Compact without losing what you do when you unlock the bootloader?
Click to expand...
Click to collapse
The Compact roll out a week ago, at the moment there is no way to have Root or anything, the developers are working on it so stay tuned on XDA.
eclyptos said:
The Compact roll out a week ago, at the moment there is no way to have Root or anything, the developers are working on it so stay tuned on XDA.
Click to expand...
Click to collapse
Not really true though, http://forum.xda-developers.com/showthread.php?t=2620794
But since there's no older firmware for the Compact you won't be able to backup the TA.
Since that thread was even posted before the launch of the compact, I thought it might be worth asking since alot can happen in a week....
Koenig77 said:
Not really true though, http://forum.xda-developers.com/showthread.php?t=2620794
But since there's no older firmware for the Compact you won't be able to backup the TA.
Since that thread was even posted before the launch of the compact, I thought it might be worth asking since alot can happen in a week....
Click to expand...
Click to collapse
I said there is no root ans still no root yet, that is just Recovery and will be a Root soon for Unlocked Bootlader but at the moment there is nothing for Locked Bootlader.
You have to wait.
eclyptos said:
I said there is no root ans still no root yet, that is just Recovery and will be a Root soon for Unlocked Bootlader but at the moment there is nothing for Locked Bootlader.
You have to wait.
Click to expand...
Click to collapse
Check second post of that thread and then tell me again that there's no root.
EDIT: But for the waiting part you might be right though.
Koenig77 said:
Check second post of that thread and then tell me again that there's no root.
Click to expand...
Click to collapse
Still no Root for Locked Bootloaders. ..hahah..
Unlocking bootlader
Sorry for being a complete noon when it comes to rooting and bootloader and backups... and what not.
What exactly is at stake here? Just got my Z1 Compact today and learning from my previous devices, N7 and LG G2 (and mistakes) i kind of wanted to unlock the bootloader as soon as possible. Now i am reading all this about TA backup and loosing DRM , and feel both lost and concerned.
Should I bother with the unlock or rather wait until developers has gotten a bit further on this? Planning to use this device as a second phone for rough weather's and hopefully won't fill it up with to much DRM protected stuff (guessing that DRM is mainly for stuff bought through Sony?) so maybe I will be fine doing it later.
Any advice or suggestions are very welcome.
Cheers.
stenbergs said:
Sorry for being a complete noon when it comes to rooting and bootloader and backups... and what not.
What exactly is at stake here? Just got my Z1 Compact today and learning from my previous devices, N7 and LG G2 (and mistakes) i kind of wanted to unlock the bootloader as soon as possible. Now i am reading all this about TA backup and loosing DRM , and feel both lost and concerned.
Should I bother with the unlock or rather wait until developers has gotten a bit further on this? Planning to use this device as a second phone for rough weather's and hopefully won't fill it up with to much DRM protected stuff (guessing that DRM is mainly for stuff bought through Sony?) so maybe I will be fine doing it later.
Any advice or suggestions are very welcome.
Cheers.
Click to expand...
Click to collapse
If you Unlock Bootlader you will lost your Warranty and DRM keys and like on Z1 you should lost X-Reality, Bionz Processing and Bravia engine. Losing this features will not compromise the working of your phone but DRM key definetly will compromise the warranty and if you lose them you will cannot Relock Bootloader anymore. Unlock Bootloader is needed if you want flash custom kernels like DooMlord kernel with recovery. So is recommended to Root first your phone and then Backup your TA and DRM keys so in the case you will want go back to Stock or go via Warranty you have just to Flash Stock FTF and then Relock Bootloader. But like I already said, there is no root for locked bootloader at the moment, and this is what OP was asking but he was just challenge me with Root for Unlocked Bootladers.

[Q] Locking, Unlocking, DRM, what do you lose?

Hi,
Just ordered my z3c, looking to put CM12 on it. I'm coming from a Nexus 5 but I've used Samsung devices where there was just about no reason to keep the stock rom, but never heard of DRM apps and functionality in those... I've read a bit about the locking/rooting/DRM situation with these phones, but I haven't found a good, detailed answer on what it is that you actually lose by flashing a custom ROM like CM12 and/or unlocking the bootloader. So my question:
-What apps/functionality is lost when unlocking the bootloader?
-Does losing the DRM keys even apply to CM12, since I'm guessing they can't be used by anything in CM12?
-Do I need to unlock my bootloader to flash CM12? No TWRP from what I've gathered, but you can flash the CM recovery?
Thanks for the help.
Correct me if I'm wrong...
zander21510 said:
Hi,
-What apps/functionality is lost when unlocking the bootloader?
Click to expand...
Click to collapse
I have read that it's stuff like TrackID, Bravia engine, PS4 Remote Play?
-Does losing the DRM keys even apply to CM12, since I'm guessing they can't be used by anything in CM12?
Click to expand...
Click to collapse
Yes, because in order to flash CM12, you need to flash a custom kernel. Locked bootloader will not accept custom kernel. So bootloader must be unlocked.
-Do I need to unlock my bootloader to flash CM12? No TWRP from what I've gathered, but you can flash the CM recovery?
Click to expand...
Click to collapse
See above. For this phone, custom recovery is possible with a locked bootloader, as long as Root has been achieved. This doesn't mean you can go ahead and flash CM12 though! But you can flash custom roms that are based on the stock Sony kernel. (Make sure to check the post - some custom roms may be based on a certain build of the stock kernel, so you'd have to make sure your phone's stock rom/kernel is aligned with that)
Another thing to note is that it should be possible to backup your DRM keys (your TA?) if you have root on your device. This would allow you to restore the DRM stuff when/if you decide to re-lock the bootloader. Backing up the DRM stuff can only be done BEFORE the first unlock of the bootloader. Once it's unlocked, DRM is gone.
LaZiODROID said:
Correct me if I'm wrong...
I have read that it's stuff like TrackID, Bravia engine, PS4 Remote Play?
Click to expand...
Click to collapse
And the low-light improvement camera function as well - there is a patch over at the cross device section, but you should be aware of it nevertheless
---------- Post added at 11:47 AM ---------- Previous post was at 11:46 AM ----------
LaZiODROID said:
Another thing to note is that it should be possible to backup your DRM keys (your TA?) if you have root on your device. This would allow you to restore the DRM stuff when/if you decide to re-lock the bootloader. Backing up the DRM stuff can only be done BEFORE the first unlock of the bootloader. Once it's unlocked, DRM is gone.
Click to expand...
Click to collapse
yes, very important - once you root make sure to backup the DRM keys even if you're not going to unlock the bl and save a copy on several locations.
So from more research, the low-light improvement (probably the most significant loss), wouldn't matter if I used CM12, with the Google Camera, as it is a function of the Sony proprietary camera rather than a function of the underlying phone/camera firmware, correct? Would this be true of the noise cancellation and other functions, baked into the ROM/apps and not a function of the firmware?
I'll still backup the DRM keys in case I need them in the future...no harm in doing so anyway.
There's a thread comparing how photos look before & after losing DRM. This may help you. The low-light one is where you see a pretty big difference.
http://forum.xda-developers.com/z3-compact/general/camera-picture-samples-unlock-t2898606
What about miracast and chromecast features? Any influence on this?
Gesendet von meinem SGP611 mit Tapatalk
So my question is if you unlock the bootloader . You can restore the DRM so that funtion is back whilst keeping the bootloader unlocked?? Correct??
eezdva said:
So my question is if you unlock the bootloader . You can restore the DRM so that funtion is back whilst keeping the bootloader unlocked?? Correct??
Click to expand...
Click to collapse
No , restoring DRMs will automatically relock bootloader and you will only be able to run them with rooted/unrooted stock firmware.
Though it is possible to restore DRM functions on custom roms but your keys are still gone. (until you restore them but then the rom wont run anymore since you willl softbrick your phone)
See here : http://forum.xda-developers.com/crossdevice-dev/sony/xperia-z1-z2-z3-series-devices-drm-t2930672
Thanks for your answer .
I checked the thread but for that fix you do need a locked bootloader? So CM won't work?
The fix it more that you can restore the functionality you lost when you lost your DRM and need to restore functionality?
Anyways I am obviously going to back them up but still would wanna understand it correctly.
Am a little confused here. ??.
---------- Post added at 04:52 PM ---------- Previous post was at 04:46 PM ----------
And with custom Roms you mean based on Sony stock I presume
eezdva said:
Thanks for your answer .
I checked the thread but for that fix you do need a locked bootloader? So CM won't work?
The fix it more that you can restore the functionality you lost when you lost your DRM and need to restore functionality?
Anyways I am obviously going to back them up but still would wanna understand it correctly.
Am a little confused here. .
---------- Post added at 04:52 PM ---------- Previous post was at 04:46 PM ----------
And with custom Roms you mean based on Sony stock I presume
Click to expand...
Click to collapse
No you need an unlocked bootloader, there would be no point to restore DRMs on locked ones since you still have them . CM cannot work with intact DRM since they require a locked bootloader. CM 12 will only run with an unlocked one.--> DRM keys gone. But as CM 12 is not based on Sony stock it actually makes no use of the technology driven by the DRM keys. So there is no fix to "imitate" DRM keys like with stock based custom roms. This would only be possible if somebody manages to port the stock sony software to CM 12 (after lollipop release ) and make the device think its running stock with intact DRMs. And i dont even know if that is possible.

Temp root to backup DRM Keys (TA-Partition) now possible?

Is it possible to get temp root, by one of the security issues that got patched by the Mai or June Patch levels?
This would allow us to backup the TA Partition.
This would make it possible to flash it back, to "relock" the phone with a working camera, if we want back on stock, without any additional modifications.
There's already a thread for (discussing) that..
Just check there
mirhl said:
There's already a thread for (discussing) that..
Just check there
Click to expand...
Click to collapse
Thank you.
I know this thread, but the XZ2 does not have any 2017 firmware with 2017 cve's.
MartinX3 said:
Is it possible to get temp root, by one of the security issues that got patched by the Mai or June Patch levels?
This would allow us to backup the TA Partition.
This would make it possible to flash it back, to "relock" the phone with a working camera, if we want back on stock, without any additional modifications.
Click to expand...
Click to collapse
Siriously @MartinX3 ? big mouth about this by me: https://forum.xda-developers.com/xperia-xz2/help/oreo-curious-drm-fix-t3805944
now you post kind of the same -___#
Pandemic said:
Siriously @MartinX3 ? big mouth about this by me: https://forum.xda-developers.com/xperia-xz2/help/oreo-curious-drm-fix-t3805944
now you post kind of the same -___#
Click to expand...
Click to collapse
Again, please stop being childish, angry and impolite.
You mentioned a DRM fix, which needs a modified kernel and will work with custom ROMs.
There was already a conversation in the "what will happen when unlocking bootloader".
I want temporally root, with a hack and without unlocking the xz2, to backup the DRM partition, which allows me to relock the phone again.
Btw. You can't use the ta partition from another xz2, you need to make a backup of your own or it will brick the phone.
The unloking will erase the ta partition.
MartinX3 said:
Again, please stop being childish, angry and impolite.
You mentioned a DRM fix, which needs a modified kernel and will work with custom ROMs.
There was already a conversation in the "what will happen when unlocking bootloader".
I want temporally root, with a hack and without unlocking the xz2, to backup the DRM partition, which allows me to relock the phone again.
Btw. You can't use the ta partition from another xz2, you need to make a backup of your own or it will brick the phone.
The unloking will erase the ta partition.
Click to expand...
Click to collapse
I'm not being childish, angry or impolite and yes i know, i am not a noob or something like that how you react to me it looks i am being that
Thats not possible for a temporally root solution, i thought you inew that already and no ofcourse you can't another partition from another xz2 because it bricked indeed, i was also a flash junky so i know all that stuff.
Btw
I send you pm
https://atcommands.org/
Maybe we could achieve root and backup our DRM keys?
https://www.zdnet.com/article/security-flaw-lets-attackers-recover-private-keys-from-qualcomm-chips/
Security flaw lets attackers recover private keys from Qualcomm chips
Firmware patches have been released earlier this month, 46 Qualcomm chipsets impacted.
DRM keys might be included in that?
[XZ2/XZ2c/XZ2p/XZ3] temp root exploit via CVE-2020-0041 [android 10]
However it seems that restoring the TA partition after unlocking didn't work...
Does anyone know if there is progress in restoring the TA partition and get the phone in its original state?

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