Hey guys I currently have an iphone 3gs on 4.2.1 jailbroken and unlocked with ultrasnow through cydia, im on ipad basband 06.15.00, I was wondering could i use snowbreeze 2.5 to update to a custom 4.3.1 firmware and use the baseband preservation mode to stay on 06.15.00 and be able to unlock on 4.3.1 via ultrasnow? I know that ultrasnow doesn't work on 4.3.1 stock frimware but is it possible to do the way i've just stated, want to go up to 4.3.1 for some of the fetures but can't afford to lose my unlock! Thanks guys!