Is there a prepaid plan I can use with my 3GS using my AT&T SIM card?

I know that StraightTalk has gone all screwy for us AT&T iPhone users. I really don't want to have to buy a new SIM card from anyone, especially not at the supply-and-demand prices one now faces in the mobile phone world.

If I can keep my number, that'd be just too groovy for words; I don't really expect to be able to though.

You can almost always keep your number when you switch phone carriers. I think you would have to get a new SIM from a new mobile phone carrier, but you should ask their customer service to be sure.

If you get your phone unlocked you can use t-mobile.

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