I have a new bootrom 3GS on the iOS 4 GM. I haven't been able to use it as a phone because it needs to be unlocked for my carrier. I want to unlock and jailbreak it. Here is my plan: Restore to a pre-jailbroken .IPSW from Pwnage tool, run the new Ultrasn0w, and viola. Any flaws with this plan? I have nothing to lose, so why not try it?