Select the Location option from the Settings menu. Most Android devices will allow you to turn off location services for your entire phone, such as GPS services and other companies' location services. Generally, by leaving a box unchecked, the location service is turned off.
At any time, for all iPhone models, choose Settings › Location Services. To turn off Location Services for your entire phone, toggle the slider at the top of the screen to OFF. To turn off Location Services on an app by app basis, toggle the slider next to the name of each app to OFF.