: He powered off the device and held the Volume Down button while plugging it into the USB port to force it into Diag Mode .
You can often access hidden menus to check or modify hardware settings by dialing these codes in the phone's dialer: : *#*#83781#*#* Alternative SPD Codes : *#*#111222#*#* *#*#46349#*#* (Common for some SPD-based Samsung clones) spd android imei repair code