Less than 24 hours in and we're feeling really good about this. Did some test walks with and without a phone and got notified appropriately.
The #ficollar uses Bluetooth when near the base station or a phone running the app (using the respective device location; no GPS chip in the base, location set manually) and wifi + (I think) collar GPS when those aren't available. When no wifi, uses mobile network and collar GPS. #fidogs