I've had Sprint for about 6 years and I've relatively happy with my call plans/service.

I've had Verizon for years, and have absolutely no complaints. Their plans are not as expensive as I've seen, and aside from from a few dead areas that I assume all services have, I don't have dropped calls. It's easy to add and drop extras, and I know more people who have Verizon as their carrier, so that makes my calling/texting much cheaper because most of them are in-network.

I was involuntarily switched to Cingular TWICE (long story) - the service always sucked. I moved to US Cellular in January, and have yet to have a dropped or unclear call. I'm not sure if they are available in your area. T-mobile's coverage areas are limited, IIRC, but I've heard good things about Verizon.

I've only had service with Sprint, so I can't compare features with any other carrier. But Sprint has been a good carrier for me. Very few dropped calls (except when the phone had been dropped too much), and nationwide service. I travel a lot, and I've had good coverage wherever I've been, including some pretty low-pop places. My upgraded voice/data plan (with a new Treo) is actually cheaper than the voice-only plan I had before by about $10 per month. My only complaint is that any change to my plan has always required a new two-year contract from the date of change. That just annoys me on general principles. Nature of the business, I guess.

I can add from a friend that Cingular did not serve her well - lots of drops and poor customer service.

CS