[Q] Locking, Unlocking, DRM, what do you lose? - Xperia Z3 Compact Q&A, Help & Troubleshooting

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?
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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.

Related

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

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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?

How important are the DRM Keys?

What does the functions do that is lost when unlocking the bootloader?
And do they make a big difference to the phones functionality?
As i gather, you lose X-Reality and Bravia Engine functionality.
If you backup your TA I think you could restore them and relock bootloader.
Also if you're on 4.2 you will break your camera. 4.3 and up fixes this problem.
Hit thanks If I helped you
I saw someone post that if you unlock on KK (4.4.2) you wont lose X-Reality and Bravia.
Only the captured images are slightly different...
what is this??
BASHARAWAD said:
what is this??
Click to expand...
Click to collapse
Something what you lose when you try to Unlock Your Bootloader.
---------- Post added at 12:46 AM ---------- Previous post was at 12:44 AM ----------
Gnubaver said:
And do they make a big difference to the phones functionality?
Click to expand...
Click to collapse
No, to me they don't but my only concern is the loss of quality in pictures, this is the only thing which stop me from Unlock my Bootloader.
eclyptos said:
Something what you lose when you try to Unlock Your Bootloader.
---------- Post added at 12:46 AM ---------- Previous post was at 12:44 AM ----------
No, to me they don't but my only concern is the loss of quality in pictures, this is the only thing which stop me from Unlock my Bootloader.
Click to expand...
Click to collapse
But you can just do a TA Backup?
Tes, but when you restore the TA backup you relock the bootloader...
Gnubaver said:
But you can just do a TA Backup?
Click to expand...
Click to collapse
Backup TA is just a Backup of your DRM keys, to not lose them permanently, so one day you want your phone back to Stock you have them and you can restore them BUT they are lost permanently when you Unlock Bootloader and they are not working, this do not effect the functionality of your phone but they affect the quality of your pictures. So apparently something they do.
eclyptos said:
Backup TA is just a Backup of your DRM keys, to not lose them permanently, so one day you want your phone back to Stock you have them and you can restore them BUT they are lost permanently when you Unlock Bootloader and they are not working, this do not effect the functionality of your phone but they affect the quality of your pictures. So apparently something they do.
Click to expand...
Click to collapse
Wait a minute, first you say they are not lost permanently by doing a backup, and then you say "you can restore them BUT they are lost permanently when you Unlock Bootloader and they are not working"
wtf?
Gnubaver said:
Wait a minute, first you say they are not lost permanently by doing a backup, and then you say "you can restore them BUT they are lost permanently when you Unlock Bootloader and they are not working"
wtf?
Click to expand...
Click to collapse
Just a language barrier I think
You can backup your TA (Which contains the DRM keys)
If you unlock your bootloader you lose DRM keys
If you restore your DRM keys by restoring your TA you relock the bootloader
Basically its not possible to have DRM keys on an unlocked bootloader
Gnubaver said:
Wait a minute, first you say they are not lost permanently by doing a backup, and then you say "you can restore them BUT they are lost permanently when you Unlock Bootloader and they are not working"
wtf?
Click to expand...
Click to collapse
Sorry for my bad english,
DRM Keys are lost permanently "when" or "after" Unlocking Bootloader, so they will not work anymore, right? because they are lost. Your phone still working well but something apparently is affected like the Quality of the pictures.
Like @gregbradley said, If you made a Backup TA you can restore them by Relocking Booloader, they are working only with Locked Bootloader.
So why Unlock Bootloader? to flash Custom Roms with Custom Kernels. To get just Root you don't have to do it and Restore TA (Bootloader) can be done on Stock Kernel only if not you can brick your phone.
I hope I clarified.
gregbradley said:
Just a language barrier I think
Click to expand...
Click to collapse
..also I wake up few minuts ago...
@Gnubaver I forgot one thing. Losing DRM Keys (Unlocking Bootloader) mean that some features will be affected or not working like BIONZ Processing, X-Reality and Bravia Engine.
Somebody said that after Unlock Bootloader on 4.4 the features still working. On 4.3 with some fix X-Reality is back, ecc...all this was not confirmed yet if it's true but I think many Devs are working on it. For sure there is a lost in Quality on Pictures because of BIONZ Processing, so at the moment I will not recommend to Unlock any Bootloader, if not on your own risk.
Well considering the losses, my bootloader is staying locked
Sent from my C6906 using Tapatalk
negrobembon said:
Well considering the losses, my bootloader is staying locked
Sent from my C6906 using Tapatalk
Click to expand...
Click to collapse
Personally I find no difference and think the benefits outway the losses, and I stay on stock based roms.... I just love DooMKerneL to much to not unlock...
gregbradley said:
Personally I find no difference and think the benefits outway the losses, and I stay on stock based roms.... I just love DooMKerneL to much to not unlock...
Click to expand...
Click to collapse
Well you got a point
Sent from my C6906 using Tapatalk
gregbradley said:
Personally I find no difference and think the benefits outway the losses, and I stay on stock based roms.... I just love DooMKerneL to much to not unlock...
Click to expand...
Click to collapse
Exactly what does DoomKernel do for "you" ?
Gnubaver said:
Exactly what does DoomKernel do for "you" ?
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Click to collapse
Read the changelog on the doomkernel thread.
gregbradley said:
Read the changelog on the doomkernel thread.
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Click to collapse
Yeah i could do that, but my question was directed to you personally, what the kernel does for "YOU". Why you like it so much.
Gnubaver said:
Yeah i could do that, but my question was directed to you personally, what the kernel does for "YOU". Why you like it so much.
Click to expand...
Click to collapse
Are you serious?
I like it because of its features, read the DooMKerneL thread to find out what they are! Or do you want me to just copy and paste them here for you!

[Q]Stuff to do before unlocking bootloader/root

So I just got My OnePlus 3T and like most, would like it rooted! I have had experience with rooting and unlocking bootloader, but since My earlier devices were by Sony, there is a lot of difference. In Sony devices, there was no need to unlock bootloader to root, but it seems that for rooting 3T, I need to unlock bootloader. Even that doesn't seem difficult since there is this great guide with a toolkit. But My concern is that do I need to backup any partition before I unlock bootloader? Like in Sony we had a TA partition, which could be backed up before unlocking bootloader and would get wiped after unlocking bootloader. This is just for keeping it as backup and restore it to device if I decide to lock bootloader again. Also, will I loose anything if I unlock bootloader? Such as anything specific to OEM or camera functionality?
Nope. On OP devices there's no permanent penalty for unlocking. If you ever want to go back, you can re-lock the bootloader. But: unlocking and locking will wipe your phone. So you can't carry over root to a locked bootloader.
dreinulldrei said:
Nope. On OP devices there's no permanent penalty for unlocking. If you ever want to go back, you can re-lock the bootloader. But: unlocking and locking will wipe your phone. So you can't carry over root to a locked bootloader.
Click to expand...
Click to collapse
Okay, that helps! So to return back to locked bootloader everything would need to be like stock(no root, custom recovery etc.)
I had read somewhere about EFS backup and that it is related to IMEI number of the phone. This need to be done before or after the rooting process?
Also, would I need to disable encryption (as it is seen enabled in settings) and remove the fingerprint lock option before unlocking bootloader?
And just to be clear, I'm going to do following steps in the sequence to flash TWRP and root, Please let Me know if it is correct:
1. Unlock bootloader
2. Flash TWRP.
3. Flash SuperUser
all this with the help of ToolKit of OnePlus 3T. I don't need to take backup as the phone is new.
Also, I will be flashing the phh SuperUser for support with Magisk as mentioned here.
Hey, do you guys know if you can get official OTAs if you have TWRP installed?
Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
Mirhawk said:
Okay, that helps! So to return back to locked bootloader everything would need to be like stock(no root, custom recovery etc.)
I had read somewhere about EFS backup and that it is related to IMEI number of the phone. This need to be done before or after the rooting process?
Also, would I need to disable encryption (as it is seen enabled in settings) and remove the fingerprint lock option before unlocking bootloader?
And just to be clear, I'm going to do following steps in the sequence to flash TWRP and root, Please let Me know if it is correct:
1. Unlock bootloader
2. Flash TWRP.
3. Flash SuperUser
all this with the help of ToolKit of OnePlus 3T. I don't need to take backup as the phone is new.
Also, I will be flashing the phh SuperUser for support with Magisk as mentioned here.
Click to expand...
Click to collapse
sajed98 said:
Hey, do you guys know if you can get official OTAs if you have TWRP installed?
Click to expand...
Click to collapse
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net
23Six said:
Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net
Click to expand...
Click to collapse
OK, thanks for your reply.
23Six said:
Former Z2 user here @Mirhawk
I did the advice backup as a precaution. Then did your 1,2,3 steps. May I ask, why Magisk? Is Android Pay currently working with stock ROM + Root + unlocked bootloader?
---------- Post added at 05:47 PM ---------- Previous post was at 05:45 PM ----------
AFAIK stock recovery is required. Otherwise install zip manually via downloads.oneplus.net
Click to expand...
Click to collapse
I'm not interested in Android Pay, as it doesn't work in My country, It is Pokemon Go I wanted, but I guess it doesn't work. Thanks for the infor though! It was a lot simple in Sony!

Backup drm keys on Pie

Can it be done?
math_green20 said:
Can it be done?
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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

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