said by Cjaiceman :

Two of my friends were on T-Mo's network and for no reason it would drop a call. They went through several phones and lived in different parts of the metro area, but still had the same crappy service. My Sprint work phone is almost as bad, its not the phone as I have had it replaced a couple times, its just their network sucks. At least in the Denver metro area AT&T and Verizon are the ones to get. I like AT&T a little more as they now have 3G, which is fast, I can usually get about 1.9-2.1Mbits/sec down while on Verizon I can only get about 1Mbps down. I also like the idea of the SIM card so I can run my TyTN II, and not have to buy the AT&T Tilt.

The point is, T-Mo sucks around here and is a joke at best. As for my friends that had T-Mo, they got AT&T and they have never looked back. Dropped calls are a thing of the past, I can't actually remember the last time I dropped a call on AT&T or Verizon...