iPhone 3G S fails activation? Read on!

Call 1-800-331-0500

Have your iPhone 3G S box handy.

Explain that your iPhone 3G S won’t activate and that you would like to read off your IMEI and SIM Card # and ICCID # from the back of the box.

Power off, Power on.

Zing!  You are done!  How easy is that?

Found info via Apple Forums here.