Mobile devices manufactured between 2006 and 2016 may have their GPS accuracy impacted due to Global Positioning Service (GPS) Rollover, which may affect performance of GPS-reliant apps. Click here for additional details.
From a Home screen, navigate: Settings > Privacy.
Tap Location Services.
Tap the Location Services switch to turn on or off .
If location services are 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 checkmark is present (options may vary with app):
While Using the App
Tap Location Services (upper-left).
Tap System Services.
Tap the desired system service switches to turn on or off :
Available options may vary based on the model.