Well yes it is true it will cost you more, how much more depends upon the Data Package that you have to have to use the blackberry. They have one that is 29.99 and one that is 49.99. I belevie the 49.99 is more for the busniess user and the 29.99 is more for the everyday consumer. I updated from a Voyager to A Curve and i dont think i want to go back to it.
Yes, the Blackberry devices require a data plan. The cheapest for unlimited personal email/web access is $29.99/mo for 1 line.