Iphone data plan vs. regular data plan

[tcruse11]

A friend gave me his iphone. I popped in my sim card and the phone worked instantly. I do not have a data plan on my current plan. Can I just call AT&T from my old phone and add the data $20 data package instead of the $30 iphone data package.

Also what if I don't add a data package? will I eventually get charged for one?

 

[Cougarcat]

No, they will know you have an iPhone and charge you $30.

 

[elephunkman]

Been doing this for the 3G and 3GS. Haven't been forced to add the iphone plan yet.