monitor a user’s location. Users who prefer not to permit such tracking and monitoring should avoid using such applications.
Your phone uses the Automatic Location Information (ALI) feature, along with AGPS satellite signals, to tell the network where you are physically located.
Note: ALI may not work in all locations and may not be available due to network, environmental, or interference issues.
When ALI is set to Location > On (the mode your new phone arrives in), services may use your known location to provide useful information (for example, driving directions, or the location of the nearest bank). Your phone prompts you when the network or a service asks for your location. You can refuse at this point.
When ALI is set to Location > Off, the phone does not send location information unless you call the emergency phone number (such as 911).
Open the main menu and touch 7Settings > General and
slide Location Based Services to On or Off.
AGPS limitations & tips
Your phone uses Assisted Global Positioning 
System (AGPS) satellite signals to estimate your 
location. If your phone cannot find strong satellite signals, your AGPS might be slower, less accurate, or it might not work at all. AGPS provides only an approximate location, often within 150 feet (45 meters) but sometimes much farther from your actual location.
To improve AGPS accuracy:
•Go outside and away from underground locations, covered vehicles, structures with metal or concrete roofs, tall buildings, and foliage. Indoor performance might improve if you move closer to windows, but some window sun shielding films can block satellite signals.