open z3x samsung tool exe and connect your samsung galaxy duos s7562
with micro uart cable (cable with rj45)
click option re partition,efs clear,boot update,
and unlock….. it will format and hard reset samsung galaxy duos s7562
Unlocking pattern lock or user lock
1. Phone must be powered on.
2. Connect the phone to UART port.
3. Choose correct COM port in port settings.
4. Press “Unlock” button.