I have an iPhone 3G that has been jailbroken with redsn0w and unlocked with ultrasn0w running the 3.0 software. I would like to upgrade to the 3.0.1 software keeping the phone unlocked, but not jailbroken. Will this work if I just plug the iPhone into my Mac and select to update via iTunes? As I said, I don't mind that I will lose the jailbreak, but would like it to stay unlocked so I can use it on any network. Thanks!