Same problem here. When I rebooted both Obi202's, instead of "Connecting to 216.239.36.144", it said "Registration Not Required". One of the services again stated "Connecting to 216.239.36.144", and I tried to reauthorize it, but that just returned the "Registration Not Required" message.
I have loved my Obi's with Google Voice for years. Hopefully this gets resolved quickly, but between this and the loud static problem, I am beginning to wonder if I need to start looking for a different solution.