I was just reading the roaming charges thread because I am going to Cancun. I then navigated for the first time ever to the 'Data Roaming' tab under the 'Network' tab in Settings. To my surprise the iPhone comes from the factory with the default Data Roaming setting turned 'off'. So my question is, why would anyone ever turn it ON? Here in Oregon I surf the web, do email and use it constantly, all in the 'off' position. All in my 'home' calling area. So, if I go to Mexico, can I surf the web with it still in 'off' postiion? It would appear so, due to this note, posted in 'Settings' just below the 'on/off' tab: "When abroad, turning off Data Roaming may avoid roaming charges when using email, web browsing, and other data services" The other being SMS, I assume, and maybe Wi-Fi access, who knows. Am I correct to assume that leaving the data roaming set to 'off ' will avoid roaming charges (if indeed one can websurf with it 'off')? Anyone have actual experience on this? ATT had no idea when I called them.