tested on begonia global miui 12.0.7 . init cm2 emmc tool on partition tool wipe nvdata. then write nvram and reboot if failed again wipe nvram and nvdata now write both and reboot if again failed wipe nvdata nvram protect 1 protect 2 and write 4 files and reboot this will restore original imeis sim 1 and sim2. no password on files.i have not tested on sp flash tool. to write in sp flash find in scatter file nvram and change "nvram.bin download=flase" to "nvram.bin download=true". just flash only this nvram.bin not other files of rom and reboot.