Verizon how ever is spend spend spend and look they cover almost ALL of North America in 3G and AT&T is just here and there 3G. So AT&T = MAJOR FAIL!
You have to know that AT&T uses the GSM version of 3G while Verizon uses CDMA2000 (NOTE: NOT the same as the CDMA technology used in Asia) version. While voice and data can be used simultaneously with the GSM version, you can ONLY use one of the other at a time while on the CDMA200 version.
While I was on vacation, I was able to talk to one of my brothers while simultaneously entering in a new cell number for one of my brothers-in-law. I would NOT have been able to do that on a Verizon phone, which is ONLY voice OR data, and not both at the same time, while on their crippled version of 3G.
I'll take AT&T's GSM version of 3G, thank you very much, although I would like to see them cover more of the US with their 3G.