I've had cell service through all of the usual suspects: Sprint, Verizon, Cingular, etc. None of them compare to T-Mobile. I've been with T-Mo for over a year now and I have never dropped a call! My phone even works in my building elevators - I'm not sure how they do that and I don't really care. I signed up when they were running a promotion (they usually are running something) and I got a great little Samsung flip/camera phone for free. Their customer service is excellent as well. Anytime I've had to call, they are always professional and polite.