I use a Tracfone because it's cheap
I was with them for years, cost me no more than ten bucks a month. Never had issues, miss it. But moved on to elsewhere.
Verizon is my provider and I get excellent reception all over the house. I even kept a call while driving through a tunnel recently.
With AT&T, formerly known as Cingular, formerly known as Southwestern Bell, for about 12 years now. No complaints thus far, other than they change names every couple years.
MTN. They're ok here at work but suck at home. Best data I can manage to get there is GPRS.
REFER TO YOUR OTHER Q BELOW
Verizon and I think they are great. (so far)
been w/ Verizon for years and have no complaints at all. Great coverage.
NASA IT, FREE AND CONVENIENT AND YOU TEND TO MEET A LOT OF ALIENS
Republic Wireless, they're OK, not many issues. It's cheap, that's why I'm there.