China Mobile A4s Firmware -

Out of the box, the China Mobile A4s runs Android 8.1 Oreo (Go edition). Let’s be honest: Android 8.1 was old when this phone launched. Today, it is a security nightmare.

The stock firmware comes pre-loaded with "China Mobile Services." If you are using this phone outside of China (which many resellers ship to Africa, South America, or Eastern Europe), these apps are useless bloatware that drain the already scarce 1GB of RAM.

The core issues with the stock ROM:

Because the A4s utilizes a Spreadtrum chipset, the flashing process requires specific tools.

Tools Required:

General Procedure:

Warning: Flashing firmware can brick your device or void warranty. Back up important data first. Proceed only if you’re comfortable with Android flashing tools. china mobile a4s firmware

Realistically? No. There is no LineageOS for the China Mobile A4s. MediaTek does not release kernel sources (GPL violation, but common in China).

However, there is a niche community creating "Slim ROMs" using the Kitchen tool (SuperR’s Kitchen). These are just the stock ROM with all the China Mobile apps ripped out and the build.prop tweaked to force GPU rendering. Out of the box, the China Mobile A4s runs Android 8

If you find a "Custom ROM" for this device, it is one of two things: