The New AT&T Replacement OEM 3G Sim Card.

Don't pay full price for a replacement SIM card when you need it the most. If you think your carrier is going to just give you one, think again.  Things happen and just like you have insurance for your car, you should have a spare SIM card in-case something happens to your phone. Keep one in your wallet or purse, and if something happens to your phone. Just call AT&T/Cingular and give them your information and they will swap your phone number to the new card.  

Thinking of giving your using an old phone for pre-paid service. All you need is this card and call AT&T to activate pre-paid service.