Do you HAVE to have a data plan to buy a blackberry from them? I know with the Iphone you get the data plan, but if my wife gets the Curve 8900 that has wifi, walmart told us that you have to get the data plan. That's not directly at&t, but I just wanted to check and make sure. If you do, my wife's getting a different phone. One data plan is enough for us (my Iphone). Thanks!