(SOLVED) a1502 820-4924a firmware locked

[Jeffotskie26]

hello can somebody help me to remove the firmware lock.
or can give me clean region with edited my serial number.
just incase needed:
serial no: C02S*******
Thanks in advance.

 

[Jeffotskie26]

close thread. i thought i made mistake with hex editing.
suddenly no display. something wrong with the lcd only.
thanks