I am a windows user with an Iphone 3G[S] and T-mobile. I updated to 4.0.1, then jailbroke the phone with jailbreakme.com, then I installed ultrasn0w 1.0-1 from Cydia. The device rebooted but it did not unlock the phone. Its still saying SIM locked. I tried uninstalling and reinstalling several times. No luck. Does anybody know a fix for this? Thanks...