I am looking to get a second hand iphone 4 but its jailbroken already. Phone is factory unlocked as it was purchased brand new in New Zealand. If I want to restore it to an updated iOS 5.0, what process do I need to follow? Can i just simply restore it via iTunes with shift + right click in Windows as per link here?? http://forums.macrumors.com/showthread.php?t=603129 Or would I need to find out what jailbreak version its using ? How can I find that out ?