Before downloading firmware, confirm your device matches these core specifications to avoid using incompatible files: : China Mobile A5 (M654) Processor : Spreadtrum SC9850K. Operating System : YunOS 5.1.3 (based on Android). Memory : 1GB or 2GB RAM. Storage : 8GB, 16GB, or 32GB internal storage. Display : 5.45-inch HD+ (1440 x 720 pixels) IPS LCD. Why You Need China Mobile M654 Firmware

Mixing M654-2.1 firmware with a v5.0 unit disables USB recovery mode permanently.

Your SIM may not connect automatically. Manually set:

There are multiple regional versions of China Mobile phones. Using firmware meant for a different variant (e.g., M653 vs. M654) can result in a "Hard Brick" where the screen stays black. Are you trying to fix a specific error like a boot loop, or

If your M654 is stuck with a blinking power LED and no web access: