If it has planned the route while within service, it actually does. It guided me from Vegas to Yosemite (via Lee Vining and the Tioga Pass) without trouble desp

If it has planned the route while within service, it actually does. It guided me from Vegas to Yosemite (via Lee Vining and the Tioga Pass) without trouble despite several areas of no service. It had registered the waypoints and knew where it was, even if I couldn't load any additional map data. (I had not saved the area for offline use.)