Settings for What iPhone Looks Like, Sounds Like, and Reports
Figure out which apps are requesting your private information.
If you scroll all the way down Location Settings and tap System Services, you’ll see a bunch of location settings tied to your cell network, your compass calibration, diagnostics and usage, Genius for apps, location-based iAds, time zone settings, and traffic. You can turn any of these on or off as well.
When an app is using your location, you’ll also see the location icon in the status bar at the top of the screen.
If you back out of the Location Services section of Privacy Settings to the main Privacy Settings screen you’ll see a list for Contacts, Calendars, Reminders, Photos, Twitter, Facebook, and Bluetooth Sharing. Tap any one of the items to see the other apps that have requested access to the selected app.