Calls were being dropped constantly over a 35 mile radius from my home down to my work in the Bronx, 30 miles south. Two visits to the T-mobile store, 3 calls to customer service and no change in service. I refused to pay the last month's bill and switched to Verizon. T-mobile claims I owe them for 2 months of service. I had over 6 months of service and since my calls were dropped 1/2 the time, I overpaid them. Now there is an annoying debt collector calling constantly.