So I own a 3gs now and I finally decided to preorder the 4S. I am grandfathered in with the unlimited data plan and I am available for the upgrade on AT&T. I just went to pre-order on their site and I got to the page where it asked me to set up my messaging plan and what not. I put unlimited data since that's what I have now and I went to checkout and it said it was added and deleted or something like that so it confused me. Did anyone else who has unlimited data have trouble upgrading? I just want to make sure it's safe to upgrade and keep the plan I'm on right now. Any answers would be really appreciated!