This has been around the block since the first introduction of the iPhone. It does not offer UMTS support. Although users are encouraged to use applications like Google Maps that are based on network connection there is not the latest standard in data connection implemented in the phone! iPhone users have to stick with the slower rather old GPRS connection that is really outdated since years.

Rumors say that UMTS will be available on the iPhone that is introduced in Europe later on this year. This might be true as the network coverage for UMTS connection is better than in the US.