Tap the Location Services switch to turn on or off .
If location services is turned on, tap the desired location service (Maps, Weather, Find iPhone, etc.).
The location service gives you a choice of when to use and is enabled when a check mark is present (options may vary with app):
While Using the App
Tap Location Services in the upper-left to go back.
Tap System Services.
Tap the desired system service switches to turn on or off :
Available options may vary based on model.