Do I need anything special to use the iPhone’s Exchange/ActiveSync functionality?
Yes, AT&T told us that those corporate e-mail features are intended for business users, which we took to mean you’ll need to pay the extra $15 a month for the corporate data plan over the regular data plan. Consumers have the option of getting similar functionality using Apple’s MobileMe. Updated at 12:50 p.m. PT to clarify a passage on taking phone calls while surfing the Web with the 3G iPhone and to add information on iPhone plans in Italy.