I currently have a iphone 3gs and it has 3.1 on it and its already jailbroken and unlocked on blacksn0w. I want to upgrade to 3.1.2, http://blog.iphone-dev.org/post/211802082/pwnage-pie for this, my baseband is 05 and i dont have a mac...can i run ultrasn0w? i dont know what to do! please help me!!! as i dont want to go for blackra1n on 3.1.2 as its tethered not untethered!