Letstalk.com includes a flyer with your phone. They say if you want to make any plan changes to call them and not ATT. They bypass ATT so if you wanna end your contract early, all you have to do is send the phone back to them and you wont be charged an early termination fee. They messed up and took the data off my iphone before I got the Captivate. I had to call ATT to get data put back, which they did with no problem. When I got the Captivate, all I had to do was take the sim card out of the iphone and put it in the captivate. I logged onto my account and it switched already. I still had to call ATT because it showed the iphone data plan. Called them and they switched to the UNLIMITED smartphone data plan.