I have an Iphone 3GS with firmware 3.1.3 And a 5.12.01 baseband, It is not activated yet. Its still stuck on the emergency call screen and i do not have a Sim Card to activate it yet. Is there a way to hacktivate this iphone? Is there a way to jailbreak it? And finally is there a way to restore it because when i try to restore it i get error 3143 so should i update it to firmware 4.0?