Wondering if anyone can help me here. My family has 3 iPhone 4's, and I have one myself. All of which are still running 4.0.1 and are all jailbroken. I just discovered the new FaceTime feature for Mac yesterday and when I try to call any one of the iPhone 4's, I get the error, "<name> needs to update to the latest version of FaceTime." I know this is because we're not on 4.1, so my question is - will I be able to re-jailbreak my iPhone if I update?