iPhone Xs
My phone uses a large amount of mobile data
Solution 6 of 6: GPS position usage for applications is turned on
Your phone can determine your geographical position using GPS (Global Positioning System). The information about your location can be used by a number of applications on your phone such as navigation, the search function or weather forecast.
Press Settings.
Press Privacy & Security.
Press Location Services.
Press the indicator next to "Location Services" to turn the function on or off.
Press the required app.
Press the required setting to turn the function on or off.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.