yupOffline maps and the mobile doesn't require cell service for GPS positioning.
But I still prefer a dedicated GPS unit over a phone.
and it's a false argument that you have to choose one over the other
all of us that like the dedicated bike GPS still carry a phone
google, google maps and booking are used as an information resource
to help decide certain things for the route
once that decision is made, the waypoint goes into the GPS
and the phone is off, safely in a jacket pocket