What should a Obi20x user do starting December 18???

[artvandelay]

Howdy. December 18 is less then 24 hours away.

What should one do to get phone service? 

I was expecting this question to have been asked and answered earlier.

Advice is greatly appreciated.

[drgeoff]

If that OBi20x user is not using Google Voice there is no need to do anything.

If that OBi20x user is using Google Voice there is no reason to believe it will stop working immediately on 18 December.  Do not do a 'factory reset'.  Do some research to be prepared to sign up with another ITSP should the need arise.