Dear community,
I've recently got a Z5 compact (updated it to MM already) and after reading around here and around the Z5 forums I came to a cruel conclusion (didn't do my homework before getting the phone, but that's my problem):
You cannot root without unlocking the bootloader and you cannot backup the DRM keys without having root access.
Is this correct? If so, how did people writing the tutorials about DRM keys backup achieve root access in the first place?
I'm a little bit confused here...
Sent from my Nexus 5 using Tapatalk
daniel_loft said:
Dear community,
I've recently got a Z5 compact (updated it to MM already) and after reading around here and around the Z5 forums I came to a cruel conclusion (didn't do my homework before getting the phone, but that's my problem):
You cannot root without unlocking the bootloader and you cannot backup the DRM keys without having root access.
Is this correct? If so, how did people writing the tutorials about DRM keys backup achieve root access in the first place?
I'm a little bit confused here...
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
currently,for the z5 family,there is no way to root without unlocking bootloader.Period.
the tutorials you see on the z5 pages are ways to restore sony credentials after unlocking bootloader but does not restore TA partition (where the DRM keys are) which is lost once you unlock bootloader. i.e you trick the phone into believing the bootloader is unlocked and can still enjoy the sony goodies with the patch (very simplified explanation here).
older models are able to achieve root (like the Z3+) only recently due to exploit found on MM and also using older firmwares.
you might want to hold back on unlocking bootloader for now.the z5 has impressive hardware rivaling samdung.the sad part is backing up TA partition while bootloader is locked,which has not been found.
that or you can hold out till the new nexus arrives.
Frostmore is correct in that you cannot backup DRM currently. But I disagree that you should hold off on doing so, the z5c lacks in most all places and root helps fix some stuff.
Does the loss of DRM keys affect camera performance?
DrYnternet said:
Does the loss of DRM keys affect camera performance?
Click to expand...
Click to collapse
yes it does, Mobile Bravia Engine is gone, Track ID in music player is gone and camera performance is also gone.
but now you can backup and restore your own TA if you have not unlocked bootloader yet
I thought that It is possible to backup TA partition with iovyroot here. It is working on Lollipop. So if you upgraded to Mashmallow, you need to downgrade with flashtool here which does not unlock the bootloader. After downgrade It is possible to backup DRM keys I think isn't it?
Yes downgrade then unlock boot loader then root then relock with DRM keys.
Sent from my E6633 using XDA-Developers mobile app
---------- Post added at 12:27 PM ---------- Previous post was at 12:27 PM ----------
It will say boot loader status relocked in service menu
Sent from my E6633 using XDA-Developers mobile app
I am completely baffled. I managed to restore ALL my original DRM keys!
I lost them while unlocking the bootloader, and then rooted my device. I also didnt do my homework and didn't realise I would lose all the DRM keys. When I factory resetted my device, using companion, I got my phone working on android 7.0 again, but ofcourse the drm keys were gone. Filming was almost impossible and fingerprint was not working etc.
And for whatever reason, guess I was bored, I unlocked the bootloader again, since it wouldn't matter anyway. So I unlocked the bootloader with oem unlock and the sony developer site, and then the device started rebooting. It looked like a bootloop, it took about 5 minutes, everything on my phone was gone (damnit). But when I tried fingerpringt, camera, everything worked like before! I have no idea how this happened but maybe this'll work for anyone here. aswell! From now on I'm not gonna touch ANYTHING anymore, since I just don't have enough developer knowledge.
btw: I made an account on this site especially to share this information with you :highfive:
Weslietje said:
I am completely baffled. I managed to restore ALL my original DRM keys!
I lost them while unlocking the bootloader, and then rooted my device. I also didnt do my homework and didn't realise I would lose all the DRM keys. When I factory resetted my device, using companion, I got my phone working on android 7.0 again, but ofcourse the drm keys were gone. Filming was almost impossible and fingerprint was not working etc.
And for whatever reason, guess I was bored, I unlocked the bootloader again, since it wouldn't matter anyway. So I unlocked the bootloader with oem unlock and the sony developer site, and then the device started rebooting. It looked like a bootloop, it took about 5 minutes, everything on my phone was gone (damnit). But when I tried fingerpringt, camera, everything worked like before! I have no idea how this happened but maybe this'll work for anyone here. aswell! From now on I'm not gonna touch ANYTHING anymore, since I just don't have enough developer knowledge.
btw: I made an account on this site especially to share this information with you :highfive:
Click to expand...
Click to collapse
Welcome to XDA, and thanks for going through the trouble of creating an account to share information.
However, some of the information you shared is either wrong or misinformed.
Also, this thread is quite old, digging up old threads is generally frowned upon.
First of all, if you never made a backup of your DRM keys before unlocking your bootloader, then those keys are gone. Forever. There's absolutely no possible way of restoring them.
Second, missing DRM keys do not cause the camera or fingerprint scanner to stop working. Only certain "enhancement features" are disabled, such as X-Reality that makes images appear sharper and more vivid when viewing photos/videos, or advanced low light noise reduction when taking pictures.
Many of those DRM-reliant features can be re-enabled by applying a DRM fix patch that can be found on the XDA forums.
The fingerprint scanner is disabled for certain region's firmware by Sony via software means, but it is not dependent on DRM.
You probably messed up somewhere flashing or rooting your firmware, causing functions like the camera and fingerprint scanner to not work. Do a factory reset or clean flash in case this happens.
And finally, it is clearly worded on the web page where you go to unlock the bootloader that your phone will automatically perform a factory reset upon unlocking the bootloader, so you shouldn't be surprised that all your data was erased. It's expected behavior.
You should always backup your data before fiddling with your phone, it's good practice and common sense.
So in conclusion, no, there's no way of restoring the DRM keys without a prior backup. You didn't manage to restore it.
Here's how to verify if your DRM keys are present:
In the dialer, input *#*#7378423#*#* to enter the service menu
Service tests > Security
If your keys are intact, the first three lines should all say [Key OK][Active], and at the bottom FIDO_KEYS : Provisioned
You probably fixed your camera and fingerprint issues by performing a factory reset unknowingly, which is done automatically when you unlock the bootloader as mentioned.
mhaha said:
***
Click to expand...
Click to collapse
Wow, I guess I'll just stick to reading this forum and finding solutions for my problems instead of trying to give advice. That'll look like a homeless guy, giving financial advise. Thanks for the large explanation anyway!:good:
Related
i'm thinking about getting this phone instead of the note 3 (coming from note 2) and wondering what the deal is with root, unlocking the bootloader etc?
ta
congratz to 1000 post... the deal? What u wanna know?
Root, well to root on locked bootloader is to make an TA Backup where all your drm keys are stored. These are removed when unlocking the bootloader. The benefit of doing this backup is that you then can restore these keys if needed in the future. And also you can run apps and access features that requires the device to be rooted.
I noticed you are in some level of familiar with custom roms and root as I checked your previous post here at XDA running some sammy roms.
But the benefits of unlocking the bootloader? You can flash roms with ease along the features of being rooted as above.
ah sorry. i didnt meant it in that sense. i had to unlock the bootloader on my old htc desire (samsung since then and no lock). i wondered what the deal was in getting it done?
on the samsungs i've just flashed a custom recovery and that's it. easy as pie but way back when i had to use a goldcard to get the desire unlocked and more steps in getting s-off
is it easy or tricky with the sony? if i get this phone i'd be needing to root straigt away to put my TB backups back on so wouldnt have any drm keys to backup yet
tommo123 said:
ah sorry. i didnt meant it in that sense. i had to unlock the bootloader on my old htc desire (samsung since then and no lock). i wondered what the deal was in getting it done?
on the samsungs i've just flashed a custom recovery and that's it. easy as pie but way back when i had to use a goldcard to get the desire unlocked and more steps in getting s-off
is it easy or tricky with the sony? if i get this phone i'd be needing to root straigt away to put my TB backups back on so wouldnt have any drm keys to backup yet
Click to expand...
Click to collapse
The TA backup does make a backup of alla the DRM keys, as the Bravia engine...and bla bla bla what other features there are.
It is easy to unlock the bootloader IF you not running Windows 8. On W8 it is a bit tricky because you have to reboot the OS in test mode disabling the driver verification in order to be able to install fastboot driver and S1 driver. Other than that, it should be done in about 30 sec if there's no issue :good:
and typically i'm on win 8 (though wish i wasn't at times).
cheers for the info. wonder if it would work with win7 via VM
well, i ordered it, and put my old note 2 for sale on mazuma
As a fellow Galaxy Note user here, Rooting the ZU is easy...
Unlocking the bootloader is another.. It is pretty much straightforward from the tutorials on this forum but you have to watch out of your TA partition..
I have gone as far as backing up my TA but I haven't unlocked my Bootloader yet.. I don't feel the need for a custom ROM yet.
Stock, Rooted .532 ROM with Xposed Framework serves most of my needs.. Plus seamless connection of the Dualshock controller which is a definite plus for me!
cool. i've read the guide and i get that the TA partition holds DRM info but isn't thatonly for purchases etc? if it's lost what's the worst case scenario? brick or you lose access to paid for content?
tommo123 said:
and typically i'm on win 8 (though wish i wasn't at times).
cheers for the info. wonder if it would work with win7 via VM
Click to expand...
Click to collapse
I have no idea how stable it gonna be to make an operation like this? ..because you have to manually unmount and mount the choosen device in to VMware. Now I don't have VMWare Workstation installed as I recently moved to Windows 8 Enterprise. ..big mistake when doing this kind of operations. It took me about an hour to figure out how to properly disarm all this stupid verification of drivers and certificates and bla bla bla microsoft features. In these moments I love my linux mint.
The TA backup benefits from that first of all you do make a backup of your DRM keys if you would like to restore them in the future if going back to stock rom and for example sending it for service covered warranty. You don't necessarily lose your warranty but there might be times when the service center denies your request as they see that the device has been tempered with. I think I read that it does also relock your bootloader but I might need to confirm that..not entirely sure.
If you lost the DRM keys or the backup? Ehm.. yeah no more bravia engine, Track ID and the other apps provided by sony wont work. Other than that, It's not that big of a deal but It's good to have a backup just in case!
ah, good to know then. cheers.
i suppose i could throw a wubi ubuntu install on or something i guess.
Yes, the TA partition has your UNIQUE DRM info needed for Sony's proprietary software to work. (aka bravia engine and xreality) take note of the word UNIQUE.. you cannot use a TA backup from another phone.. So you really have to back it up.. A few minutes of effort to back it up is worth spending rather than losing your keys forever..
As I've read from one of the posts on other threads, restoring the TA partition would not relock your bootloader.. They are two separate steps.. You have to manually relock it after restoring.. Which as far as i understand is fairly easy although I haven't done it myself..
Sent from my C6833 using XDA Premium 4 mobile app
Hi everyone, sorry if this is the wrong spot to ask.
I have pre ordered a Z2 and since I am new to android and have always been an avid jailbreaker, would like to root my Z2 and eventually play around with custom ROMS.
DooMLoRD announced today that Touch Recovery is working on the Z2 so it can now be unlocked and rooted. I have a few Q's specific to this process.
1. Correct me if I'm wrong but at the moment there is no way to root the Z2 WITHOUT first unlocking it?
2. You need root to do a TA backup, so the current process of unlocking then rooting will result in lost DRM keys?
3. I read that unlocking wipes all data. Does that mean that the Z2 is then unbootable until you have flashed a ROM. Or is the stock ROM still actually in place and bootable, just without any user data?
4. What specific features are lost when you don't have DRM keys? I read something about losing functionality in the photo album and walkman apps, and bravia engine (but that may have related to unlocking the Z!).
1. You are correct.
2. Correct again.
3. The stock ROM will be in place and the phone will be usable, but all user data will be wiped.
4. I have the same question for the Z2. I haven't seen the answer anywhere, but I think @DooMLoRD and @yeeson should know...
Unlock will be lost TA！
yeeson said:
Unlock will be lost TA！
Click to expand...
Click to collapse
Do you know what features you lose when you lose TA with the Z2?
JMonkeYJ said:
Do you know what features you lose when you lose TA with the Z2?
Click to expand...
Click to collapse
All the normal functions
yeeson said:
All the normal functions
Click to expand...
Click to collapse
When you say this, what exactly do you mean? Since a phone has a lot of functions. Calls still work I presume, as well as wifi and mobile data. Camera, audio, play store and google apps etc...?
I thought it was just a few Sony specific functions that stop working, like Sony's OTA updates.
It seems blog sites all over the net are reporting this method of rooting as an easy user-ready option. In their rush to get hits, they are completely neglecting to mention the fact that at the moment this is a one-way process, and that there are some very specific downsides to rushing into rooting the Z2 at the moment.
I hope people are doing their reading first
cronugs said:
When you say this, what exactly do you mean? Since a phone has a lot of functions. Calls still work I presume, as well as wifi and mobile data. Camera, audio, play store and google apps etc...?
I thought it was just a few Sony specific functions that stop working, like Sony's OTA updates.
It seems blog sites all over the net are reporting this method of rooting as an easy user-ready option. In their rush to get hits, they are completely neglecting to mention the fact that at the moment this is a one-way process, and that there are some very specific downsides to rushing into rooting the Z2 at the moment.
I hope people are doing their reading first
Click to expand...
Click to collapse
Unlock all normal ！
There is no bug！
Can back to lock, and then to OTA！
yeeson said:
Unlock all normal ！
There is no bug！
Can back to lock, and then to OTA！
Click to expand...
Click to collapse
But you only can relock the bootloader only if the Z2 gets a proper root with locked bootloader in order to perform a backup of the TA partition. Once you unlocked it without backup, DRM keys will be lost forever and you'll lose your warranty and you won't ever be able to relock it again. No you can't use the TA backup from another phone. It would hard-brick your phone. I hope that helps!
Sent from my D5503 using Tapatalk
jjpro45 said:
But you only can relock the bootloader only if the Z2 gets a proper root with locked bootloader in order to perform a backup of the TA partition. Once you unlocked it without backup, DRM keys will be lost forever and you'll lose your warranty and you won't ever be able to relock it again. No you can't use the TA backup from another phone. It would hard-brick your phone. I hope that helps
Click to expand...
Click to collapse
That's exactly what I thought. Is a proper root for the Z2 likely?
cronugs said:
When you say this, what exactly do you mean? Since a phone has a lot of functions. Calls still work I presume, as well as wifi and mobile data. Camera, audio, play store and google apps etc...?
I thought it was just a few Sony specific functions that stop working, like Sony's OTA updates.
It seems blog sites all over the net are reporting this method of rooting as an easy user-ready option. In their rush to get hits, they are completely neglecting to mention the fact that at the moment this is a one-way process, and that there are some very specific downsides to rushing into rooting the Z2 at the moment.
I hope people are doing their reading first
Click to expand...
Click to collapse
You MIGHT lose X Reality. DooMLoRD has tweeted a few days ago that all devices with 4.4 that unlock their bootloader will not lose it anymore, but, not that I don't believe him, but I will only be 100 about that seeing many confirmations.
Also, I think you might lose the possibility to use Music and Video Unlimited. Haven't heard anything about PS Mobile, but I think it is included. Can't remember anything else...
Hi everyone,
I'm hoping to use this thread to get the full story on the whole DRM keys issue that comes with unlocking your bootloader. For myself to get a clear picture, but also for others who are interested.
So far I've only been able to find bits and pieces about what exactly the DRM keys do, and how to handle them, I'll start off by writing what I (think I) know, please correct me if I'm wrong:
What do the DRM keys do?
So far I found out they're needed to run the Walkman app, which is understandable as it involves music purchases which are DRM protected.
Personally, I couldn't care less about this app not working anymore, your opinion might differ.
I also heard they're needed for the 'Bravia engine', now this is something that concerns me more, so far I haven't been able to find out what exactly is this 'bravia engine', I would go on a limb and say it's the screen rendering engine, and removing the DRM keys could completely mess up the colors or something, but this is a pure guess, and could be completely wrong. This is the first point which needs clarification.
Can the DRM keys be backed up?
Until recently, no, since the DRM keys reside in the 'TA partition', backing them up was something which required root access, and then again root access was something that could only be obtained by unlocking the bootloader, which in turn wipes the 'TA partition' before you could back it up.
However, since recently, there's a way:
Thanks to our famous friend geohot, we have recently got the ability to root our tablet using his 'towelroot' app. It works by breaking into a kernel vulnerability present on the stock ROM, and inserting root access that way, thus not touching the bootloader (which effectively remains locked). Since we now have root access I was able create a backup of my TA partition, which I've safely backed up to google drive, just in case.
Here are the threads I used to get me this far:
Root my device
Backup TA partition
Install XZDualRecovery
So now I have a rooted stock ROM, XZDualRecovery (which includes TWRP recovery which I prefer), and backed up TA partition.
Can the DRM keys be restored?
According to Install XZDualRecovery"]the thread of the 'TA Backup tool'[/URL] , yes. I haven't tried this out myself, so no personal experience here.
It also says that restoring the keys effectively re-locks your bootloader, which brings you back to zero off course...
Note: The thread explicitly says that trying to restore a 'TA backup' which was created on another device, will effectively hard-brick your device!
For this boils down to 2 options:
Either you can live with a locked bootloader, and have the DRM keys in place
Or you unlock it, and use the device without DRM keys
Off course to make this choice, we have to fully understand what exactly stops working when DRM keys are removed.
Hi, i tried alrdy to restore DRM after i flashed castor CM11 on my Tablet, but i softbricked them. I was in hope that this way will give me a chance to use Sony aps etc.
I restored with Flashtool , now is all ok and Running without DRM. I mean the TA Partition mess up with Bootloader so your Device will not Boot after u try to restore them.
Except on Stock ROM..
ive also came to the same conclusion but heres the thing...ive got an Ultra Z which i had the bootloader unlocked without backing up the TA Partition. Ive installed TWRP, wiped it clean and flashed PA Rom. Then decided to go back to Stock and now everything works as it should. Bravia engine is enabled, walkman app works and the OTA is working as it should. So what am i missing here?
Hello,
I have been reading the XDA forums for a while now, but it is until now that I have a question that I can't find an answer to.
I want to backup my TA, however I see that in order to do that I need to root.
I found that in order to root I need to unlock the BL, thus losing the DRM keys which is the reason why I want to back up.
What do you recommend? I don't want to lose my data on the phone, is there any way to downgrade to a firmware that can be rooted without unlocking BL without losing my data?
Or, is there a way to backup TA without rooting?
Thanks for your help!
m180up said:
Hello,
I have been reading the XDA forums for a while now, but it is until now that I have a question that I can't find an answer to.
I want to backup my TA, however I see that in order to do that I need to root.
I found that in order to root I need to unlock the BL, thus losing the DRM keys which is the reason why I want to back up.
What do you recommend? I don't want to lose my data on the phone, is there any way to downgrade to a firmware that can be rooted without unlocking BL without losing my data?
Or, is there a way to backup TA without rooting?
Thanks for your help!
Click to expand...
Click to collapse
The only way now to downgrade to Lollipop is by flashing firmware through Flashtool. And yes you will lose your data. But you can make a backup or not? Flash the Lolipop firmware. Root your device and backup your TA partition. After you can unlock the bootloader. And unlocking the BL will wipe your data.
ekin_strops said:
The only way now to downgrade to Lollipop is by flashing firmware through Flashtool. And yes you will lose your data. But you can make a backup or not? Flash the Lolipop firmware. Root your device and backup your TA partition. After you can unlock the bootloader. And unlocking the BL will wipe your data.
Click to expand...
Click to collapse
And can I restore DRM key (TA partition) from Lolipop backup to MM ?
harisdelic said:
And can I restore DRM key (TA partition) from Lolipop backup to MM ?
Click to expand...
Click to collapse
I didn't try yet, but why not. You just need to be rooted. If you try, write us a feedback, so we will now, is it posibble or not.
I thing that if you restore TA partition, this will relock your bootloader. Note. If you restore backup TA, you need to be on stock firmware and kernel before that.
Monipeev said:
I thing that if you restore TA partition, this will relock your bootloader. Note. If you restore backup TA, you need to be on stock firmware and kernel before that.
Click to expand...
Click to collapse
And do you know what I will lose on my phone if I unlock bootloader?
harisdelic said:
And do you know what I will lose on my phone if I unlock bootloader?
Click to expand...
Click to collapse
This please, I haven't done all the process because I read so many conflicting ideas of what will happen:
Warranty Voided - This one I mind, but is not a deal breaker
Camera will not longer work - I love the Sony camera functions, such as AR fun, Motionshot, etc and I wouldn't want to lose them if I have to use another Camera app.
Camera quality will be very poor but I can still use Sony camera functions
Camera quality will be very poor and I won't be able to use Sony camera functions
I won't be able to use any Sony software such as Music, Video, Album, Sony Xperia Care, etc
Are they true or not? I have tried to find the answers myself, but the more I look the more confusing it gets
m180up said:
This please, I haven't done all the process because I read so many conflicting ideas of what will happen:
Warranty Voided - This one I mind, but is not a deal breaker
Camera will not longer work - I love the Sony camera functions, such as AR fun, Motionshot, etc and I wouldn't want to lose them if I have to use another Camera app.
Camera quality will be very poor but I can still use Sony camera functions
Camera quality will be very poor and I won't be able to use Sony camera functions
I won't be able to use any Sony software such as Music, Video, Album, Sony Xperia Care, etc
Are they true or not? I have tried to find the answers myself, but the more I look the more confusing it gets
Click to expand...
Click to collapse
Restoring the TA partition DOES relock bootloader.
DarkerJava said:
Restoring the TA partition does NOT relic bootloader.
Click to expand...
Click to collapse
Are you sure? See the picture below, it's from this post by
@zxz0O0
http://forum.xda-developers.com/showpost.php?p=50176658&postcount=1
DarkerJava said:
Restoring the TA partition does NOT relic bootloader.
Click to expand...
Click to collapse
Restoring the TA Partition will relock the bootloader!!!
---------- Post added at 18:22 ---------- Previous post was at 18:08 ----------
m180up said:
This please, I haven't done all the process because I read so many conflicting ideas of what will happen:
Warranty Voided - This one I mind, but is not a deal breaker
Camera will not longer work - I love the Sony camera functions, such as AR fun, Motionshot, etc and I wouldn't want to lose them if I have to use another Camera app.
Camera quality will be very poor but I can still use Sony camera functions
Camera quality will be very poor and I won't be able to use Sony camera functions
I won't be able to use any Sony software such as Music, Video, Album, Sony Xperia Care, etc
Are they true or not? I have tried to find the answers myself, but the more I look the more confusing it gets
Click to expand...
Click to collapse
Warranty Voided - Depends on where you live. In some country's, it does not affect the warranty. But if you backup the TA partition, you can always restore it, and relock the bootloader, so the warranty stays.
Camera will not longer work - Stock camera is working without any problems, and you can use all the apps, such as AR Fun, Motionshot, etc.
Camera Quality will be very poor but I can still use Sony camera functions - To be honest, on Lollipop, i saw the difference on camera photos, when it was unlocked or when it was locked. It only affects the low light photos, more digital noise. In daylight, the photos were the same. But the difference in low light photos was very small. On Marshmallow, i tried the same. Compared the photos on unlocked and on locked BL., i couldn't notice any difference. In low light also, photos were the same, the same amount of digital noise. When i will have more time, i will post the photos, compared, so everybody can see.
Camera quality will be very poor and I won't be able to use Sony camera functions- As i said before, you can use the stock camera and all the apps in it.
Won't be able to use any Sony software such as Music, Video, Album, Sony Xperia Care, etc - You can use all those apps, only you will not be able to use- The Lounge, TrackID, and i don't know what else, i didn't test everything. Those apps you mentioned will work without any problem. You will only Not get the software updates in the Settings.
ekin_strops said:
Restoring the TA Partition will relock the bootloader!!!
---------- Post added at 18:22 ---------- Previous post was at 18:08 ----------
Warranty Voided - Depends on where you live. In some country's, it does not affect the warranty. But if you backup the TA partition, you can always restore it, and relock the bootloader, so the warranty stays.
Camera will not longer work - Stock camera is working without any problems, and you can use all the apps, such as AR Fun, Motionshot, etc.
Camera Quality will be very poor but I can still use Sony camera functions - To be honest, on Lollipop, i saw the difference on camera photos, when it was unlocked or when it was locked. It only affects the low light photos, more digital noise. In daylight, the photos were the same. But the difference in low light photos was very small. On Marshmallow, i tried the same. Compared the photos on unlocked and on locked BL., i couldn't notice any difference. In low light also, photos were the same, the same amount of digital noise. When i will have more time, i will post the photos, compared, so everybody can see.
Camera quality will be very poor and I won't be able to use Sony camera functions- As i said before, you can use the stock camera and all the apps in it.
Won't be able to use any Sony software such as Music, Video, Album, Sony Xperia Care, etc - You can use all those apps, only you will not be able to use- The Lounge, TrackID, and i don't know what else, i didn't test everything. Those apps you mentioned will work without any problem. You will only Not get the software updates in the Settings.
Click to expand...
Click to collapse
Thanks a lot! That clears most of my questions. If I understood correctly then if I'm in Marshmallow and want to backup the DRM keys I should downgrade to Lollipop, root the phone without unlocking the bootloader there, then backup the DRM keys by doing a backup of the TA partition.
Then I can unlock the bootloader, flash a pretooted Marshmallow, right?
m180up said:
Thanks a lot! That clears most of my questions. If I understood correctly then if I'm in Marshmallow and want to backup the DRM keys I should downgrade to Lollipop, root the phone without unlocking the bootloader there, then backup the DRM keys by doing a backup of the TA partition.
Then I can unlock the bootloader, flash a pretooted Marshmallow, right?
Click to expand...
Click to collapse
That's right. Or you can wait until somebody finds a way to root (Marshmallow) on locked bootloader. But, if you have time and patience, than downgrade to lollipop and do it now.
Hi all,
So ive been holding off modding my phone as the thought of DRM key emulation etc makes me uneasy... Is there a safe repeatable way for me to backup my DRM keys, so that I may restore them at a later date if I sell my phone or return it for repair?
After many months of lurking, I have still yet to find any concrete answer to this
Kind regards
Gomezie said:
Hi all,
So ive been holding off modding my phone as the thought of DRM key emulation etc makes me uneasy... Is there a safe repeatable way for me to backup my DRM keys, so that I may restore them at a later date if I sell my phone or return it for repair?
After many months of lurking, I have still yet to find any concrete answer to this
Kind regards
Click to expand...
Click to collapse
There is no restoring them, only backing them up. I've been using the DRM fix for going on 7 months or so and no issues.
Thanks, thats a shame I would like to resell this device with confidence.
Kind regards
I think there's some misunderstanding.
If you had never unlocked your bootloader, then your DRM credentials are (obviously) intact and you can backup and restore them using this tool. As long as you've made a backup of the TA partition (where the DRM stuff resides), you can fully restore your phone to its original stock and warranty-covered state. See the linked post for details and links to tutorials.
If you did not backup your TA partition BEFORE you unlock your bootloader, then it is as civicsr2cool says, there's no restoring them, it's gone forever. The good news is that you can employ a workaround ("DRM fix") which emulates DRM that allows certain DRM-reliant functions to work (e.g. low light algorithm etc.), but your warranty remains voided, and it does not restore your original DRM.
Since you said that you've held off modding your phone, I believe your situation falls into the former category, in which case the answer to your question is, YES, there is a SAFE and REPEATABLE method to backup your DRM and restore it.
So you are saying it is also possible to re-lock the bootloader and restore the formerly backed up TA partition and that gives you back a phone that is indistinguishable from an untouched stock phone? So, if done right, all steps are reversible? Is there a full tutorial (especially for the restore) you can point us to?
Cheers
Lemming0815 said:
So you are saying it is also possible to re-lock the bootloader and restore the formerly backed up TA partition and that gives you back a phone that is indistinguishable from an untouched stock phone? So, if done right, all steps are reversible? Is there a full tutorial (especially for the restore) you can point us to?
Cheers
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yes , this is the thread , http://forum.xda-developers.com/z5-compact/general/summary-tutorial-root-sony-xperia-z5-t3360515 check it out. you can backup ta partition and then root and later roll back to .200 fw at which you backed up TA partition and restore your drm keys. you can even restore them while you are rooted and having those lost functions back , check it foe that. http://forum.xda-developers.com/xperia-z5/development/root-automatic-repack-stock-kernel-dm-t3301605
http://twigstechtips.blogspot.gr/2016/04/sony-z5-compact-root-without-losing-ta.html
Good guide using tools you ll find here.
for mm .253 i used rootkernel v3 rc4. It seems to work fine, root, xposed, etc, but can't comment yet on battery or other issues that show up in longterm.