i have mx5 ! model M575
and firmware 4.5.2A i want revert to first firmware (4.5.2.c ) …because my device have randomly shuts down or reboot by itself! ( i see many person have this problem)
now when i want revert back to 4.5.2.c ! i see error: firmware corrupt!
i use this method for flash: volume up button + power button
please help me revert back!