I just recently purchased a brand new unlocked T-Mobile Mytouch 3G and currently on my AT&T Sim Card. I have the $30 AT&T Blackberry data plan so the internet/data and service works fine but I'm concerned more about if I'm going to be charge more for going online etc. I can't tell AT&T to add a Mytouch Android plan because first of all its only for T-Mobile and they don't carry Mytouch 3G. Please, I'm really worried about going online because i wasn't sure it's going to be charge extra, anything will help! Thank you.