...can I restore my phone to it's current Jailbreak state if I ever upgrade the iOS? Example. 1. I Jailbreak my 4S 2. I create a backup of it in iTunes 3. I keep the backup file nice and safe in another non-iTunes Folder 4. I upgrade my phone to iOS 5.1 5. I decide that was dumb and want to go back to my Jailbroken 5.0.1 6. Can I do that just by restoring my phone using my jailbroken iTunes backup file?