http://money.cnn.com/2013/07/08/tech...P_LN&hpt=hp_t3

The article basically says that AT&T has increased speed and bandwidth, to where they are no longer experiencing the "crowd problems" where you could not use your phone for data when in a densely-populated area, such as a major city, stadium, or casino.

I have noticed an improvement over the last 2-3 years, but I still notice the data struggling at times when in a highly populated place. Fortunately I can switch to the outdated "Edge" network, which most iPhones cannot do, as I have jailbroken my phone.

The article notes, however, that AT&T is still only "catching up" to Verizon, and that Verizon will leapfrog ahead of them again very soon, as they have had their technology and coverage in place for a long time now.

I have AT&T primarily because I'm grandfathered in to a great deal with them, and to switch at this point would make my cell phone bill skyrocket.

I will say that I am generally satisfied with their customer service. I have never had Verizon cell service before, but customer service was TERRIBLE at T-Mobile, and also pretty bad at Sprint.