My dad decided he wants to give the iPhone a try. I'm giving him my old 3GS which I haven't used in about two years. It is jailbroken and unlocked and running iOS 4.0.1. Unfortunately, most apps from Apple's App Store requires the phone to be at iOS 4.1. Is there a way to upgrade from 4.0.1 to 4.1 and keep the phone Jailbroken and unlocked? Any suggestions? Thanks!