I am having some issues trying to unlock a Iphone 3g with firmware 3.1.3 and baseband 5.12.01 I have tried jailbreaking with redsnow, it freezes and loading second stage and says waiting for reboot I have tried snowbreeze, itunes fails to load the custom .ipsw I tried blackrain, it freezes on running and sometimes said it completed but it never worked. I finally got the jailbreak to work with Spirit. So then i downloaded ultrasnow and installed it, rebooted the iphone and...nothing unlock never worked. All the info I read said ultrasno should do the trick. Is there any reason that is unlock would not be working? Any suggestions would be greatly appreciated!