Sony Xperia Z2 smartphones are getting the Android 6.0 Marshmallow update via Android Open Source Project (AOSP). Although the device had been confirmed by Sony to receive the official upgrade, the unofficial Marshmallow build is intended for those who cannot wait for the release date of the official software.
Sony Xperia Z2 is a lucky device as an independent software developer has crafted a custom ROM for the smartphone based on the Android 6.0 Marshmallow software. The XDA member rcstar6696 brought in the unofficial software with a host of improvements Google has to offer, plus more of the developer's native features.
Like any other manual installation, users are warned to use Sony Xperia Z2 devices (Sirius model) only and not try it on other device due to compatibility issues.
The developer furthered that installing the ROM means automatic void of warranty unless restoring it in its old original state. Device should also be rooted, and has enough storage space and battery life. Back up all necessary data using Clockwork Mod (CWM) Recovery or TWRP.
To install the Android 6.0 Marshmallow upgrade, here's a good way to go:
1. Download the Marshmallow ROM on PC and device.
2. Turn the phone into recovery mode. If device is rooted, use Quick boot app to boot into recovery, or by pressing and holding the volume down and power buttons together for a few seconds.
3. Perform backup.
4. In TWRP recovery, select Wipe and then Advanced wipe. On the next screen select options such as Dalvik cache, System, Data and Cache. Then do a swipe on the swipe to wipe option.
5. Return to the main recovery menu once wiping task is completed and select Install then Storage.
6. Go to downloaded file's location.
7. Select the file and swipe it to begin installing.
8. When installation is done, restart device.
Per user comments on a report published on IB Times, the custom ROM has almost the same features with the official build.
