Sim Cards

[tinroof]

Hey All,

I have been looking around and I only ever hear about using T-Mobile sim cards after unlocking, but is that the only prepay sim card I can use on my iPhone 1st gen? Or can I just go anywhere and buy a prepaid sim card?

Thanks for the help.....you all are really great....I'm still learning.

[adlyr]

I believe you can use the AT$T as well (im assuming your in the US). I dont think any others here use SIM cards. Here found this:
http://www.youtube.com/watch?v=EvPLufA69qQ

(sorry, tried to embed video, but it never works for me for some reason).