> If there are no routers or Volk phones nearby to hop to, you'll either not have service, have to use Wifi, or fallback to LTE if you have a SIM card installed and it has active service.

That does make the "Global Coverage: Our network is everywhere our users are" claim a bit dodgy, no? Sure, you'll have coverage in the middle of the desert—if there happens to be a chain of Volk phones from there to the nearest point with actual regular coverage... which is highly unlikely.