I've got a unactivated 3g iphone that the apple store sent me home with since the activation servers were down. I'm at home and I keep getting the " we could not complete your itunes store request. An unknown error occurred (-4)" error trying to activate through itunes. All of a sudden I got a text message from att and the phone activated. I now have 3g service. What the hell is going on, how is that even possible?