AOSPA which is a clean and basic ROM is now available for Sony Xperia ZL android phone. This android ROM is based on Android 5 lollipop firmware. Before you flash it, you must bootloader unlock your Xperia ZL. Android 5 brings many new features to this aging Sony android phone. It is pity that this phone, which was once considered Sony’s flagship is not being supported anymore.
Download Sony Xperia ZL Android 5 firmware: Installation Procedure
1. Extract the boot.img from the zip file.
2. Reboot device into bootloader, then flash the boot.img: “fastboot flash boot boot.img”.
3. Boot into recovery.
4. Make a backup just in case, then wipe the device (factory reset and wipe system).
5. Flash the ROM zip.
6. Flash GAPPS (5.1 remember!).
7. Flash SuperSU to attain root, no need to follow separate root instructions.