I noticed on 2Degrees compatible phone list they state "Samsung phones running Android 10 or later will work for VoLTE and WiFi Calling on 2degrees....". Looking at the specs on gsmarena for the Xcover 4S  it is upgradable to Android 10. How likely is this going to work for me on 2DM WiFi calling if I can get a used unlocked 4S running on Android 10? I get the feeling I'm better off looking for an S7 but I would prefer a more robust phone like the Xcover, can't afford the new Xcover 5.