My Sister in Law had her beloved (and 3 month old ) iPhone 3G stolen last week and is going through serious withdrawal. I bought a new 3GS and intended to sell my 3G, but will now just hand this one over to my sister. I wanted to make sure she would have not issues in taking it in to ATT and getting a new SIM/Activation processed. I am pretty sure this will be no issue, but wanted any other thoughts.