Who runs GPS?
GPS is run by the US Space Force, and full accuracy has been available to civilians since 2000.
What sensors are in a smartphone?
Smartphones contain many sensors, including GPS, accelerometers, gyroscopes, and magnetometers.
Who runs the GPS that smartphones use?
The GPS that smartphones use for maps is a constellation of US satellites operated by the US Space Force, and it's free for anyone in the world to use.