Ok, so I just returned from a day in Chicago on my way to a wedding in Eau Claire, WI. I have the iPhone 3G and I have not used the 3G very much on it because I don't go to anywhere that has 3G around me. So, needless to say, when I got to Chicago, I was excited about using the 3G and seeing how great the coverage was. I couldn't have been more disappointed. I'm not sure if it's my iPhone, or if it's AT&T's network, or both. My friend that has the iPhone as well was having similar problems. Even right in DOWNTOWN Chicago, my phone would go from No Service to 1 bar of 3G and then sometimes go back to full service of 2G. Every time I tried making a call even when I had full service 3G, my phone would say that the call failed. I don't understand. It must be something in the phone because I can't imagine something could be this bad with AT&T's network. But, the weird thing is, when I'm in like Flint, or Detroit and happen to pass through and have the 3G on, I never have any problems. IDK . . . .