the new curve? I live in Chicago and currently have verizon. my contract ends in april and I really want to get the new blackberry curve. the reason why i dont want the curve, or any smartphone for that matter, on verizon is because I dont want to have to pay for a data plan. T-mobile, unlike all of the other carriers, doesnt require u to pay for a monthly data plan. also, verizon is very overpriced... how is T-mobile coverage in Chicago? should i make the switch?