My friend supposedly jail broke & unlocked my iPhone 4.2.1. & band 6.15 W/Cydia. & redsnow. But when I try to put in my go phone sim Card it says no service & that my carrier AT&T is no longer available. Any suggestions? When I purchased my go phone, AT&T removed the original sim from my iPhone .
Correct me if im wrong but i believe you need to have the Greavy sim as well to complete your process.