Mason,
I'm on ATT and asked for the same thing... they informed me that I could not have two activated devices using the same SIM, and a copy of the SIM would indeed be "the same SIM", and I'd have to add a line for the new device. HOWEVER, ATT offers FREE SIM CARDS NOW. If your on ATT, you can order one for free and give it a try.
Mason,
I'm on ATT and asked for the same thing... they informed me that I could not have two activated devices using the same SIM, and a copy of the SIM would indeed be "the same SIM", and I'd have to add a line for the new device. HOWEVER, ATT offers FREE SIM CARDS NOW. If your on ATT, you can order one for free and give it a try.