OK so I just ordered my N4 and plan to use it on Straight Talk. I currently run my GS1 on ST with ATT towers. I had hoped to use my sim card in the N4 or just order a new one. I see I would need to cut it down but I assume I can use my old sim card in my new phone right? Otherwise I'm really screwed because the T mobile coverage here is horrible. Does anybody have any good links on the size I would need to cut down my ATT ST sim to a ATT Micro sim on ST?