You're assuming the programmers who built that app utilized only GPS for rerouting. Did they program it to call home and ask the server for re-route instructions? I don't know how the mapping apps handle this, so I cannot answer this. If you find an app that just displays GPS statistics and then turn off cell service you will see that your phone is still connected and receiving data from GPS satellites.
rectangle 0 points 10 months ago
You're assuming the programmers who built that app utilized only GPS for rerouting. Did they program it to call home and ask the server for re-route instructions? I don't know how the mapping apps handle this, so I cannot answer this. If you find an app that just displays GPS statistics and then turn off cell service you will see that your phone is still connected and receiving data from GPS satellites.