I have no idea, I called Apple and they are saying to pretty much just wait, but what I don't get is people currently opening up their new iPhones and activating them with no problem, if the system was backed up then how are they activating theirs and we cant and have been trying all day. Ive done everything I can to try and get it activated, hard-restart, restart, took sim card out and put it back in, iTunes activation, att web sight activation, tried activating it with old sim card, letting it sit for a hour and trying again and sill getting "SIM card in your iPhone does not match the SIM card associated with your account" Its the same number I have had for years, same SIM card that i ordered the iPhone with and same SIM card that it came installed with, ATT says the SIM that came with the iPhone 4S is active and working and I can confirm that cause if I take the SIM out of the iPhone 4S and put it into my iPhone 4 I can call out and have 3G service so I dunno man i guess just wait overnight what do you think?