I just bought a iphone 4s and I am missing a SIM card and now I can't get service. I checked and checked the packaging but found no SIM card. Wasn't my phone suppose to come with one?
If you bought it from Verizon they may have expected you to use your old SIM. Nonetheless, you can get a free SIM at a corporate store.
I wondered about that as well, but even Apple states it has a Micro SIM for the 4s with CDMA.