I don't have a lot of experience with 3G as I have no iPhone. But I am gaining experience with my 3G iPad.
I am currently traveling on I 80 west of Lincoln, Nebraska. I am passing multiple cell towers. I can barely load a page. It takes minutes not seconds to load a map or get a weather report. My connection is showing AT&T at 2-3 bars but it has an E or circle (like a donut) after it. I don't know what those mean. While I would expect spotty coverage in lesser traveled areas this is a major east west interstate.
I keep thinking of all those bogus AT&T commercials bragging about their 3G coverage. I call bull*^%t.
What does E & the donut mean anyway?