I've had Cellular1>Cingular>ATT since 1993. In my area, this service is superior to Verizon, which my wife has always had. She frequently borrows my phone when we travel 'cuz she can't place calls due to lack of signal.

The network that I use is extremely quiet. People often ask if I am sitting in my living room on a land line.

My concern is that the Verizon vs. ATT quality varies around the country. suginami, I think you'd be best served to ask people in your local area what they think of Company A vs. Company B. I've heard plenty of people say that Verizon is superior to the other carrier in their local area.