"Harry Krause" wrote in message

From what I have learned, the quality of cell service depends upon where
you are in a provider's area, and what it is you are doing.

Plus, as you mention below, the number and location of the cell towers. We
have a similar problem regarding coverage, with Nextel. In our local and
regional area we have a lot of dead areas, when you're not quite able to
grab a cell. I suppose that results when one carrier has to lease tower
space from another. Reputedly, Verizon coverage in this area is seamless.