There is definitely a way to back up your DRM keys while on MM. But I tried severl times with several software but was just not able to restore DRM keys .
Has anyone been successful ?
Related
So, My current phone is a Sony Ericsson Xperia Arc, when you rooted it/unlocked the bootloader, you'd lose the DRM keys, with no way of getting them back other than buying a whole new phone,
I'm considering getting the SGS3, so my question is, if you unlock the bootloader and root the Galaxy S3 do you lose any functionality? (DRM keys, etc, etc)
Thanks!
bootloader is unlocked on almost all samsung phones by default. Rooting will not affect any functionality
Rooting will show on custom rom counter voiding warranty but is reset via Triangle Away app .
ROOT.
http://forum.xda-developers.com/showthread.php?t=1695238
jje
Apart from upping the flash counter by one, you don't loose anything by rooting.
Sent from my GT-I9300 using Tapatalk 2
The DRM keys are stored in /efs/ , so not even changing between custom ROM's will affect them.
Hi,
I rooted my Z2 tablet a few days ago and have found that I don't really need the advantages it brings (from what I can tell). SO - I want to get it back to the way it was when I first opened the box.
I have seen threads about different devices and how to restore them to factory or stock (??), but they seem to call for specific files or flash software. So that brings me once again to this forum to figure out whether anyone can direct me to some instructions on how to do this. I figure it shouldn't be too hard. Just being careful.
Thanks very much for the advice once again.
I think if you flash the rootable kernel again, you could use an unrooting tool to undo the root. I'm also aware that there are files that you can flash to re-lock the bootloader (I once did this with an Xperia mini pro, although I'm not sure if such file exists for this tablet) but the DRM keys are lost forever a.f.a.i.k. But at least if you manage to re-lock the bootloader you will be able to install F/W upgrades through official ways again.
degraaff said:
I think if you flash the rootable kernel again, you could use an unrooting tool to undo the root. I'm also aware that there are files that you can flash to re-lock the bootloader (I once did this with an Xperia mini pro, although I'm not sure if such file exists for this tablet) but the DRM keys are lost forever a.f.a.i.k. But at least if you manage to re-lock the bootloader you will be able to install F/W upgrades through official ways again. Anyhow, you won't be able to restore to (more or less) factory status without at least flashing a couple of files.
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THank you for the response. Unfortunately i'm not even sure how I would go about flashing 'the rootable kernel'.... Feeling a bit foolish for getting into this actually.
From what i'm reading, it seems like I need to get the stock software and start again. So i'm looking for the 'FTF' for my tablet, which is a SGP511. Not having any luck though.
Which was the process that you followed to root it?
degraaff said:
Which was the process that you followed to root it?
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Click to collapse
It was on another site - can't remember which. It got the clockwork mod installed. I think? Or was that just a recovery thing? No idea.
I'm actually now just doing a factory reset to see what happens, and it said 'root access possibly lost' in the process, which I thought was a good sign. Guess i'll keep tinkering with enough caution to eventually get the warranty back in tact.
Hopefully the loss of DRM doesn't effect the warranty.
In that case I guess you will have to download a firmware ftf file of an official unmodded firmware (preferably one of your region but I think especially if you have the wifi-only version it doesn't matter much as long as it contains the interface and input languages that you need), and install (or "flash") that using Flashtool. After that the root will certainly be gone and if you could then find a file to relock your bootloader I think your warrenty will be fine. I honestly don't think that Sony service and repair personel will check for DRM keys every time before repairing a device.
UPDATE
Factory reset appears to have gotten things back to normal. My plan is now just to unroot using an unroot tool (app i guess?) and then to lock the bootloader some how as well.
fearofbirds said:
Factory reset appears to have gotten things back to normal. My plan is now just to unroot using an unroot tool (app i guess?) and then to lock the bootloader some how as well.
Click to expand...
Click to collapse
So it's certain that the tablet is still rooted at this moment? Some superuser apps have an option to do a full unroot, such as SuperSU, you could try that
That's great. I think that's sorted it out. SuperSU had the full unroot option and it looks like it's all sorted.
Thanks for the help.
Hello,
Yesterday I rooted my z5c, and today i have gotten notification about Nougat update, so i wondered is there a way to update my phone and still have root access, if not can someone explain me what to do, and yeah I made a mistake as I am beginner and haven't backed up DRM keys is there any way to recover that, so far I haven't noticed that I lost anything but as I haven't backed it up I guess I lost it.
Thank you in advance, T1n3k!
If you're rooted, you shouldn't update with the Sony update functionality. I you want to update to another version, feel free and use XperiFirm/Flashtool. After doing that, you need to patch again to gain root access. If you browse through the top topics in this subforum, you'll find enough guides which can help you through the process.
Once you've unlocked your bootloader, you can't backup your DRM keys anymore. In fact that doesn't matter, because there's still the DRM-fix available. It gives you about the same functionality.
So I basicly do what I've done for this root with New firmware? And are you maybe able to send me link with DRM-fix, thank you for fast response!
i have my ta keys backed up but noticed you cant relock a bootloader when using a custom kernel is there any other way to restore my drm functions without going back to stock (its a kernel to get root thats all)
i have fw build number 34.3.a.0.252 (reason i needed root is disable the update notification)
not according to this post
https://forum.xda-developers.com/xperia-xz/how-to/how-to-unlock-bl-kernel-twrp-root-t3541648
Hello first xperia device and its very nice. I unlocked bootloader and rooted but decided to go back to stock as there isn't any custom roms out here. After reverting using flashtool AND companion i checked DRM keys and it looks like they are back (Active). My question is how will i Find out for sure?
https://forum.xda-developers.com/xperia-1/help/xperia-1-drm-keys-locking-bootloader-t4079715