I just renewed my t-mobile contract and as a bonus they offered me a drastically reduced price on an iPad. My husband just got me a mini iPad and I LOVE it! I don't need this bonus gift for myself but my son and his wife in NYC would probably LOVE to have an iPad. Will the bonus gift iPad I get from t--mobile work in the US? I think the bonus iPad is accepts a sim-card (as opposed to my mini which does not), and if that's the case I know my son would need to get a sim card in the US for the iPad. But otherwise, the device is usable, right????