After I had cancelled service within grace period, T-Mobile sent me a bill for over $521. They wanted early termination fees, monthly fees and over $50 in taxes. I had received phones 7/16 and returned them on 7/28. We had no service while in Maine, the phones were difficult to use and they continuously had an ad to upgrade service on my phone. When I received bill I called customer service and both rep (Greg) and supervisor (Natalie) insisted I had terminated service early and an additional month's fee was due as I had not... read full review »