Just some common sense observations: Carriers, regardless of whom, want to keep you on the line as long as possible, unless your plan is unlimited minutes. I have used sprint, cingular, verizon, and t-mobile...they are all about the same. I noticed "dead" spots in various areas in all of them. They all have dropped calls on me regardless of time and where I am at. But right now im sticking with cingular/at&t as they have the largest network in the US, maybe the world? and they are the only ones that will be selling the Apple Computer iPhone...mmm iPhone. lol. As for fewer dropped calls from any of them, honestly, that has not been my reason for switching. In the end it is always customer service. Cingular seems (so far) to have the most professional CS people I have dealt with.