By using the mini computer we all call a smart phone with an appropriate map application installed on it with relevant and appropriate map files downloaded, when coupled with a true GPS/GLONASS module, it acts and works EXACTLY like a GPS navigation unit, NO MATTER WHERE YOU ARE as long as you can "see" the satellites. There is ZERO reliance on wifi, there is ZERO reliance on cell service, it operates completely stand alone, just like a Garmin, etc., etc., etc.
I do understand that.
I also understand that even if you can manage to make something that isn't a GPS work just like a GPS, you are at least as well off with the GPS in the first place.