I just connected a "New" out of the box OBI202 that I purchased about 3 years ago on sale to eventually replace an OBI100 that appears to have finally died this afternoon. I found it had a Red/Green Flashing Light on it and it was just stuck there. I had automatic firmware updates disabled, and it was on a UPS Battery Backup all these years, but yet it appeared to be hosed, no dialtone. Power Cycling the OBI100 box only gave me a solid Red light, so I tossed it aside and installed this new OBI202.
It came right up normally, so i removed the OBI100 from my Google Voice account and added the OBI202 back in it's place. Everything seems to work just fine.
I also disabled automatic software updates for the OBI202 unit because I don't want it updating unattended as I live in Florida and we have lots of afternoon storms around here that could interrupt the internet at any time. I keep my routers, OBI, Switches and PC's all on UPS Battery Backup Units all the time and typically they keep running without issues.
I just checked the firmware version on the Obi202, and it evidently automatically installed Version 3.1.1 (Build: 5695EX) Firmware the instant I connected it to the Internet. I had manually updated it last year and put it away again as I like to keep a hot spare available. Last year when I updated it, I wrote down that I had installed FW 3.1.0 (5264) on July 9, 2016 before putting it back on the shelf as a spare unit.
Anyway, the Firmware 3.1.1 (Build: 5695EX) appears to be installed on it now, and its newer than anything I can find on the Forum or the download sites. Hopefully it will continue to work without issues.