I thought I'd ask here before I call AT&T- don't feel like dealing with customer service. I'm a new iphone customer and have the 900 minute plan with the unlimited text messaging. I've downloaded the free AIM app that I use a a lot.

? is - Using the app is covered in my plan correct? I wouldn't want to be charged a fee per every IM sent. Just want to make sure.

Thanks for all your help in advance....