According to AT&T if you do not notify them and update your account to a data plan and you just put your SIM card in blackberry your account will automatically adjust to the appropriate data plan. But the catch is it only updates your account to the blackberry data plan upon first use of data. Me and a very helpful AT&T Customer Service person worked this all out "theoretically"(to cover his butt) together. This is what you do 1. Call At&T and tell them you want a complete data block on whatever line your about to switch over to the blackberry. (of course dont tell them what your doing though) 2. Try out your phone and try to do anything data wise to be sure it is blocked from any data receiving. (texting still works just not sending pictures) 3. If your phone is blocked from data, take the SIM card out and place it in your blackberry. 4. Enjoy your limited use blackberry thats GREAT for texting and looks. Since your line cannot access data at all the blackberry will not ever make that first use of data stated in their policy and never update your data plan. Its been over a month since I have done that and still working just fine and account still has no data plan. Keep in mind that with Data blocked you can still receive SMS text messaging but cannot send video or pictures through SMS because that uses data. It just irritates me that AT&T is backing thier customers into a corner and telling them they cannot have a cool phone unless you pay them more even if your not gonna use the service they still want your money. The reason AT&T says they force people into a data plan is because the smartphones capabilities allows it to get on the internet and use allot of data. But if you ask them to just block the data so you can just use the phone as a text phone they wont let you do that even though that makes perfect sence to the customer it doesn't to AT&T because they make less money. I say AT&T should give you these choices when upgrading 1.Get A Data plan for your phone 2.Have all data but text blocked completely from that line(which will avoid huge bills--the reason why at&t is forcing people to pay 30 more..ironic) 3. Or require the Smartlimits feature on the phone and Decide for themselves how much data they would like to be allowed per month. And do away with the auto data plan add when connecting a new smart phone. Instead when a Smart phone is connected they can put an automatic data block on that line and force the user to then sign into thier account and adjust the data plan that works for them. This way the customer is not forced into a crazy plan they don't need and AT&T don't have to worry about people racking up a huge phone bill.(like thats their real concern LOL) Anyways, Hope this helps someone somehow.