Samsung I5503T nexTel unlocked via Z3x

Procedure:

*Open Samsung Tool
* Enter code *#9090# - choise usb diag. (or *#197328640# -> 9 -> 4 -> usb diag ) then reboot phone
* Connect cable. Setup drivers
* Select Diagnostic port in port settings
* Press Read Codes button.



* insert pinas sim
* input NCK
* DONE!