có z3x thì làm theo hướng dẫn ở dưới anh ....


1. Power on phone.
2. Type *#197328640# -> common -> usb config -> Samsung mode
3. Connect 2in1 cable, setup drivers.
4. Choise port of RJ45 connector in port settings.
5. Choise unlock method: Read codes or Unlock.
6. Press Unlock button.