Hi guys, I got an Iphone bought from my friend. It was 1.1.1 at first ( I could make a call and access to Itune) and then I update it to 1.1.4, The ITunes doesn't recognise my Iphone and it requires my SIM to activate. What should I do now??? I want some guides for jailbreaking this Iphone. THank you guys very much. I would appreciate if you can help me!!!