So I JB the phone with the untethered JB from redsn0w that just came out and since I didn't have a good baseband for unlock, I flashed with the ipad baseband so I am now on 6.15. I downloaded ultrasn0w from cydia and then popped in the T-Mobile sim card and I get nothing. What am I doing wrong? I will also note that the t-mobile sim card only works on edge and it doesn't have a 3g plan attached to it. Would that matter? ---------- By the way, I am NOT using custom firmware. Is that the issue?