Only use if bootloader is .
Before flashing anything, back up your OEMinfo partition via ADB. That file is your digital lifeline.
: You can verify your current firmware and hardware info before writing by dialing *#*#2846579#*#* for ProjectMenu (Manufacture Mode) or *#06# for the IMEI. Risk Warning
Power off your phone completely. Hold the Volume Down or Volume Up button and connect it to the PC.