No mobile data will be used as the maps are cached on your mobile phone and GPS does not require it. This works for me. It should work for you too. And there is no need to waste money on roaming data just to get to places, although they do come in handy if you do not do your homework before travelling — pay for being lazy.
The Google Maps app is awesome—until it isn’t. On back roads without a cell signal, you were better off with a trusty topo or paper atlas. That changed a few weeks ago when Google announced
Does Cell Phone GPS Work Without Service. Many people use their cell phones to get directions or find out where they are. If you’re not connected to the internet, your phone can still use GPS to help you find your way. Apps like Google Maps and Apple Maps can track your location without any internet connection. Does GPS Work Without Internet
10) Go back to the main screen of "GPS Connector" and you should see the time as well as Latitude and Longitude coordinates on the screen 11) Minimize the "GPS Connector" app into your "Recent Apps" and open Google Maps 12) If you don't have location right away, click the small circular button with the red "?" zbeeKvW.