I just bought and unlocked Iphone 3gs on 3.1(7C144) Modem Firmware 05.11.07. My question is since it a used phone, there is another owner's name, what happens if I connect this to Itunes and reset? Will it update itself and get locked? Can I reset name/files etc without upgrading to latest firmware? From what I have researched there seems to be no unlock for firmware 3.1.3. Or can I upgrade to 3.1.3 and unlock? Thanks for the help in advance. Oh and the Iphone has Cydia.