System-arm64-ab.img.xz Android 12 -

For developers, building a custom GSI from AOSP source is possible but resource-heavy:

fastboot flash system system-arm64-ab.img system-arm64-ab.img.xz android 12

Option B (safer for seamless updates): Flash to both slots For developers, building a custom GSI from AOSP

Most Google Pixels (from Pixel 2 onward), OnePlus 6/7/8/9, Xiaomi Mi A series, Essential Phone, and many Nokia Android One phones. Xiaomi Mi A series

Developers often distribute raw system images to port Android 12 to older devices or devices with locked bootloaders (though the latter is significantly more difficult). This file allows a developer to extract specific proprietary blobs or the framework itself to merge into a new build.

This naming convention identifies the specific technical requirements for the device it is intended for:

Whether you’re a developer testing multi-window support on a tablet, a power user escaping an abandoned vendor skin, or a hobbyist learning Android internals – mastering the GSI flash process unlocks possibilities that manufacturers would rather keep closed.