Flashing the official stock ROM is a powerful troubleshooting step. It is commonly used to fix:
Before downloading any software, ensure you have the correct model. The A4S is built on a chipset, which dictates the type of flashing tools you must use. Specification Model Number Processor MediaTek MT6750N Octa-core Operating System Android 7.0 (Nougat) Memory/Storage 2GB/16GB or 3GB/32GB variants Battery 3300 mAh (Non-removable) Display 5.7-inch IPS LCD (720 x 1440 px) Why You Might Need the Stock Firmware china mobile a4s firmware
When the phone is stuck on the startup screen. Flashing the official stock ROM is a powerful
Removing Google Factory Reset Protection after a hard reset. china mobile a4s firmware