You cannot flash custom system images on a locked bootloader.
Do not flash the .xz file directly. Use a decompression utility like 7-Zip (Windows) or the terminal (Linux/macOS) to extract the file. xz -d system-arm64-ab.img.xz Use code with caution.
This is a high-ratio compression format used to reduce download sizes. You must extract this file to get the usable .img file. Prerequisites Before Flashing
The sections below explain each of these components in detail, then provide a complete technical guide on finding, preparing for, and installing this image.
When downloading an Android 12 GSI, you will often see variations of the system-arm64-ab.img.xz file designated by letters: system-arm64-ab.img.xz android 12
With the release of , Generic System Images (GSIs) have become the go-to way for developers and enthusiasts to get the latest OS features on devices that manufacturers have left behind. What is system-arm64-ab.img.xz?
(Note: The -w command completely formats user data. Ensure everything is backed up before running it). Step 5: Flash the Android 12 GSI
Refers to A/B (Seamless) Updates . This image is specifically for devices that support dual partitions, allowing for simultaneous system updates.
: Strip away heavy manufacturer skins like MIUI, One UI, or ColorOS in favor of a Pixel-like experience. You cannot flash custom system images on a locked bootloader
If you want to tailor the installation to your specific hardware setup, please share: The exact of your device. The current Android version running on your phone.
Because GSIs are built to be generic, they occasionally encounter bugs when interacting with unique, device-specific vendor code.
Android 12 brought significant changes that are baked into this GSI:
If the device doesn't boot, you may need to disable "Android Verified Boot" (AVB) by flashing a vbmeta.img with specific flags. xz -d system-arm64-ab
Android 12 GSIs are often too large for the traditional fastboot partition configurations. You must boot into user-space fastboot, known as . Run the following command: fastboot reboot fastboot Use code with caution.
This image is specifically for ARM64 devices and Android 12. Users with different architectures (like ARM32 or x86) or Android versions will not be able to use this image.
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This refers to the partition layout. Android uses an A/B (or Virtual A/B) slot system for seamless system updates. Modern GSIs use a unified format that handles A/B layouts natively.
Indicates it is for A/B (seamless update) devices with system-as-root structure. .img: The raw system image file format.