actually if you did not yet sign up for contract or pre paid i suggest you look for simple mobile. It's pre paid

unlimited minutes,unlimited global texting,unlimited nationwide texting,unlimited WEB IM , surfing.. everything it runs via t mobile so you will have3G

40$ unlimited minutes , text
50$ unlimited minutes , text , 150 mb of web i think
60$ unlimited everything << so i just moved from t mobile to simple mobile basically same thing but all i have to do is either go to local simple mobile store or order credit for my phone online.

I think its a good deal