Hey guys, I've had this 16gb iphone 3g and I've jailbroken it but the unlocking is giving me some problems. After I install blacksn0w and let it run, the top left shows the bars completely low, then proceeeds to "Searching...", then "No Service", followed by "No sim card installed". I've tried this method both with the sim in and without and the same thing keeps happening. FWIW, it's 3.1.2 and 05.11.07. I'm trying to unlock it for use for Tmobile. Any ideas what I can do?