Xperia XZs AOSP Pie Project [G8231 Model]
This is the very first custom ROM which I made with the help of some stuffs from Sony Android Open Source Project (AOSP) and also Linux for Win10 (Windows Subsystem For Linux). Although building process had been stalled few times but hey, It can able to boot well, at least.
Despite Sony will never have Pie version upgrade for this device, but Sony still provides some stuffs in order to allow power users to bring in Android Pie into this device. However, installing this custom rom will not get any kind of benefit as the stock ROM counterparts. You can install any kind of apps on this custom ROM but except one thing - Google apps don't work on this rom, so you might see a warning message appears on the screen when successfully booted but you can ignore it. You will need to install 3rd party app store like APKPure, Amazon App Store or even F-Droid in order to use it.
LTE connectivity, voice calls, wifi connectivity had been tested working well. Other things I might not tested yet.
Please note that installing this custom ROM requires a suitable device with an unlocked bootloader. You will not be entertained if you're asking on how to unlock the bootloader. INSTALL IT AT YOUR OWN RISK!!!
For further details, visit this site here: https://forum.xda-developers.com/xzs/development/rom-aosp-9-0-pie-xperia-xzs-t3921109