1.open Z3X Samsung
2.choose phone model
follow first:
1. Enter code *#7284# - choise phone usb.
2. Enter code *#9090# - choise usb diag. (or *#197328640# -> 9 -> 4 -> usb diag )
then reboot phone
3. Connect cable. Setup drivers
4. Select Diagnostic port in port settings
3.tick Unlock
4.wait until it finish




DONE.
2.choose phone model
follow first:
1. Enter code *#7284# - choise phone usb.
2. Enter code *#9090# - choise usb diag. (or *#197328640# -> 9 -> 4 -> usb diag )
then reboot phone
3. Connect cable. Setup drivers
4. Select Diagnostic port in port settings
3.tick Unlock
4.wait until it finish




DONE.