Just some final thoughts as I have read through ALL the messages for this post (@SteveInWA ;-).
I switched over to
Simonics.com workaround described in a previous post to restore telephone service to 3 locations/OBi100 devices (my own, my parents and my in-laws). For those intimidated by the setup, don't fret, it's simple, so don't go out and buy the latest OBi device if you don't have to. Just follow the instructions laid out in the post and you will be fine.
I'm not convinced, though, of the issue Obihai is reporting with Google making changes, but I also don't want to spent too much time trying to investigate a problem that only takes $6 bucks to fix. The reason I'm skeptical is because Obihai does not seem to have the greatest backdoor communications with Google. Years ago, like 4-5, they said that Google would be discontinuing Google Voice and that we'd all have to move to some other service. Well, that was a major blunder on their part as Google Voice never went offline and still continues to this very day. Wish I still had that message they put out.
My service only recently went offline (like as of 12/3/17 or 12/4/17) when others reported it over a month ago and Obihai posting the cause of the issue on 11/7/17 on their blog. So why did mine still continue to work when Google supposedly change something.
Something just seems fishy.