The iPhone has built-in GPS capabilities that make it possible for services and applications to determine your location in real time. Examples of services and apps that may use the GPS feature include those that provide driving directions, locate nearby businesses or points of interest or show friends where you are. Apple calls these "location-based services." Disabling the GPS feature not only blocks services and apps from seeing your location, but it also helps to conserve battery life.
Turn on the iPhone. If needed, slide the "lock" slider to to "unlocked" position on the screen. Tap the "Settings" icon on the iPhone's home screen.
Select "General" within the "Settings" menu. Select "Location Services" from the list of options.
Tap on the "Off" option under "Location Services" to disable the GPS function. Press the "Home" button on the front of the iPhone to return to exit the "Settings" menu.