Determining the iPhone’s Location

Many times, you might want to know information about your current location (for example, to find the nearest metro station). The iPhone is a good reference tool for these situations because most people carry it with them and it has Internet connectivity. 3G iPhones can determine their location using GPS, vastly improving user experience.

Location Technologies

To provide good location information everywhere, the iPhone combines three sources of information: GPS, nearby cell phone tower IDs, and local Wi-Fi access point IDs.