Spend some time on the howard forums, they use cingular's towers, but coverage ISN'T the problem in cali, theres plenty of coverage. Basically, the problem is the ability to handle a large volume of calls at once (mainly, nights/weekends, when everyone is using their free time), and for that, T-Mobile has a large advantage, apparently they've installed two switches to every one cingular has. People's biggest complaint with cingular is the "fast busy" they get either when trying to send or recieve a call, NOT the coverage.
