+ Sunday December 15th, 2019

Sony Xperia
If you know anything about modding your Sony Xperia phone, you’ll know that unlocking the bootloader means you won’t be getting the full camera experience, due to the loss of DRM keys when you unlock the bootloader. But there’s hope on the horizon, with modders posting a new hack on XDA-Developers which works around the restriction.

According to the forum post, the hack allows you to restore features like BionZ, Noise Cancelling and X-Reality which are lost after unlocking. Sony uses DRM keys stored on the TA partition, but unlocking the bootloader removes these keys, this new hack simply removes the check in Sony software which looks for them. It’s technically rather inelegant, it doesn’t actually restore the DRM keys, but in this case, inelegant works.

It’s a lightweight patch, clocking in at less than 2MB in size, but it will need to be applied with each update you receive on the phone. The process is apparently fairly volatile, so it’s a case of modder beware, and ensure you follow the step-by-step instructions on the forum thread.

If you’re willing to be a guinea pig on your Xperia Z series phone, head on over to the forum thread on XDA-Developers and start reading.

Source: XDA-Developers.

Daniel Tyson  

Daniel Tyson

Daniel is a former editor of Ausdroid, and left in February 2019.

newest oldest most voted
Notify of
john
Guest
john

It’s a misleading title you can’t unlock the bootloader with the patch

Chris
Guest

When you flash back to a stock ROM (using the available images from Sony’s website, does that restore the DRM keys? (I suspect not, but I can’t find a ready answer)

Brinly Taylor
Ausdroid Reader

nope. they are gone permanently.

Joshua Hill
Ausdroid Reader

No, unfortunately it does not restore your DRM keys.

Joshua Hill
Ausdroid Reader

You can always back up you original DRM keys. Install whatever crazy ROMs you want on your unlocked bootlader. When you reinstall the stock Sony OS you flash back the DRM keys and Sony is none the wiser. Atleast this works on the Z1 compact.

As the other Z series phones had workarounds developed almost from day dot this was always going to happen and some of the negativity around this is OTT.

Brinly Taylor
Ausdroid Reader

you can’t. there is no known vulnerabilites to get root to backup the drm keys (you pull from /dev/block/platform/msm_sdcc.1/by-name/TA )

Joshua Hill
Ausdroid Reader

For the Z3/Z3 compact you can’t. For the Z1 compact and most of the rest of the Z range you most definitely can. I and many others at XDA can happily verify this. I hope you just misread my comment as what you have said is inaccurate.

Brinly Taylor
Ausdroid Reader

reverting to older kernel versions doesn’t count. that’s by definition a hack. . futex bug is patched in latest firmware 🙂

whitelunchbag
Ausdroid Reader
whitelunchbag

This is the good kind of Sony hack

JeniSkunk
Guest
JeniSkunk

Reading the XDA thread.
On the Z3, there’s another thing tied up in that damned DRM. The PS4 Remote Play.

So far, this mod does NOT restore that capability.

JeniSkunk
Guest
JeniSkunk

Just reading the OP in the XDA thread.
Confirmed stable working on the Z3.
Unstable working on the Z3C.

No mention of the Z3 tablet compact.

Dan, the CRITICAL you left out in your article is that this mod on the Z3 is for KitKat only.

JeniSkunk
Guest
JeniSkunk

Thanks for the heads up, Dan.
🙂
One step towards making the Z3 series a viable device series to buy.
Here’s hoping they can figure out a similar hack for the screen.

Check Also

Deals from the review bench: HDHomeRun TV Tuner on Sale

It’s not often we comment on a device still under review, let alone a device …