Using Google Maps in a car with a Hotspot and a cell phone with no sim card I have a  AT&amp;T Samsung Galaxy 7. 
I have another AT&amp;T phone with no sim card. 
I have a verizon hotspot and will be purchasing an AT&amp;T hotspot as i am converting to almost full time RV'ing.

Is it possible to use google maps, Waze, or any other driving app like that with my no-sim card phone through one of my hotspots as i drive the country ?
Given that I've sat in a moving bus only using WiFi an can see the blue dot in Google Maps move down the street, it should work.

You may have location problems if there isn't any GPS signal and you are in an area where there is little geolocated WiFi hotspots/signals.