How to Restore DRM Functionality on Xperia Z5 after Bootloader Unlock

There’s no easy way to root Xperia Z5 other than unlocking the bootloader and have SuperSU installed via TWRP recovery. However, unlocking the bootloader has its ups and downs on Sony devices, like you lose functions like X-Reality engine, Sony app updates, etc as a result of losing DRM keys due to bootloader unlock.

Unlocking bootloader on a Sony device wipes the masterkey in TA unit and hence makes all Sony credentials inaccessible. And unfortunately, there’s no way to restore the DRM keys once they are wiped.

But thanks to tobias.waldvogel over at xda, you can now simulate the Sony credentials and have the lost functionality restored on your bootloader unlocked Xperia Z5 with a simple MOD flashed via TWRP.

Grab the Xperia Z5 DRM restore MOD from the download link below and simply and flash the zip via TWRP recovery on the device.

Warning: Please note that this method has not been tested yet completely. Do not try to unlock your Xperia Z5’s bootloader thinking that this method will restore the DRM keys on it. Just try it only if you have already unlocked bootloader  your Xperia Z5.

The DRM key restoration method by the XDA user tobias.waldvogel supports all Xperia Z5 variants (Z5 compact, Z5, Z5 Premium, Z5 dual).

How to restore DRM keys on Xperia Z5:

All you need a rooted Xperia Z5 with TWRP custom recovery and DRM Restore file. Download ‘drmrestore.zip’ file [HERE] and save it on the phone.

Just flash the drmrestore.zip file in TWRP recovery, and then delete the contents of /data/credmgr (use any root explorer like ES File Explorer).

Of course, rooting the Xperia Z5 enables you to get rid of bloatware and flash custom ROMs on the phone. However, Sony’s camera software has many unique features and these will not be accessible on a rooted phone. Also, rooting the Z5 is tricky and not advisable for the less tech-minded user. 

Source – Reddit, XDA