I have an m300b that was RETURN FOR SERVICING" problem.
After FFS format i had no network. Tried to flash it with m300b and m300 firmware but didnt help.
Tried OTP repair,again NO NETWORK.
Then i flashed FULL FLASH with UFS3 (cause u dont have eeprom or full flash for this model on support section) and phone was alive and all ok , but IMEI 00000000000000. Tried OTP repair and after imei repair again,NO NETWORK.
Any chance to revive it to work with original IMEI?