: This replaces your entire system with the bare-bones engineering environment.
: Some advanced users have even used ENG mode to support eMMC changes , upgrading storage from 64GB to 128GB by swapping physical chips and repairing the software identities. How to Use It (Carefully!) ENG Firmware Xiaomi Redmi Note 9 (merlin) (Engi...
Flashing ENG firmware is a high-stakes procedure. It usually involves tools like SP Flash Tool or MiFlash and requires a Windows PC. : This is the essential first step. : This replaces your entire system with the
: For many custom ROMs, experts recommend having your firmware at MIUI 12.5 before transitioning. If you've accidentally updated to MIUI 13 or 14, ENG Firmware can sometimes act as a bridge to safely downgrade. It usually involves tools like SP Flash Tool
: Once in ENG mode, you can fix IMEI or partition tables.