Location Services allows applications such as Maps and Camera to gather and use
data indicating your location. Location Services does not correlate the data it collects
with your personally identifiable information. Your approximate location is determined
using available information from cellular network data, local Wi-Fi networks (if you
have Wi-Fi turned on), and GPS (if you have an iPhone 3G; GPS not available in all
locations).
You can turn Location Services off if you dont want to use this feature. If you turn
Location Services off, youll be prompted to turn it back on again the next time an
application tries to use this feature.
Turn Location Services on or off: Choose General > Location Services and turn
location services on or off.
To conserve battery life, turn Location Services off when youre not using it.