POSSIBLE SOLUTION to LONG Activation Waits : Sim Card # Not Updated
After waiting over 5 hours for my iPhone 3GS to activate, and after reading forums, I decided to call AT&T. After first telling me I would have to go to an Apple Store and have it activated, the representative checked with an Apple Rep. I then gave her the IMEI # and the SIM CARD # of the new iPhone.
It turns out, AT&T did not have the new sim card #, they still had the old one from my first generation (non-3g) iphone. After they input the correct # and shutting down both phones, I connected the 3GS to iTunes and it was immediately activated- IMMEDIATELY!
So the problem may not be the servers, the problem may be a lack of communication between Apple and AT&T or someone at AT&T not inputting new Sim information.
I have been advised NOT to merely switch the old sim with the new. If you call AT&T have the NEW SIM # and your IMEI Number. Both are available on the sticker on the back of the box so you don't have to physically remove the sim card. (The sim card # is the one on the bottom left labelled ICCID)
iPHONE 3G S Black 16GB, iPhone OS 3.0