Just went to the ATT store (they gave me a couple of spare MicroSIMs free of charge). Anyways, I canceled my data plan for this month. I noticed I can't get the "3G" data icon next to the ATT on the upper left hand corner. That means the microSIM card is "deactivated" I know with regular att sims, once a sim is deactivated, you can't reused it again. But can you "reused the MicroSIM" on the iPad? The ATT store rep told me I can't. That's one of the reasons they gave me another microSIM. I am trying to reused the original microSIM that I was using with my iPad 3g and I can't sign up for another data plan. Only if I use wifi will it let me sign up for the data plan. So I am think the ATT rep is wrong? I can still re-use the micro SIM card that's originally came with my iPad 3g? If that's the case, why can't I access "view my account" under the cellular option under my iPad. I can only access it via wifi at this time.