I too lost my GV service on my 110 about a week ago. Standard "Backing Off (XXXs): Authentication Error." message. I had not changed my Google password, but this seems to happen from time to time. (Google or ObiHai on another push to get people to buy a new device?)
I was trying to do the reset as instructed, but kept getting an error message. I had deleted the device from my profile, re-added the machine using **50011, and started the Google Voice setup procedure. I was logged into the correct Google account, but when I tried to complete the process I got a small pop-up stating "Cannot configure device. Please try again!" I went a little more advanced, tried updating the network settings to include a public DNS (instead of my gateway router's IP). Still no success.
I noticed someone else mention browser, so I thought I would give that a go. I generally roll with Firefox, but when I want the "full experience" I use Internet Explorer. I don't have AdBlock, NoScript, etc.. running on IE. So I was using Internet Explorer but it was just not working. So I jumped onto Google Chrome. I had to temporarily disable ScriptSafe, turn off AdBlock and AdBlockPlus. Once I logged into ObitTalk and tried to configure the device again, I finally had success.
So if you have been reading messages but haven't seen this issue addressed, make sure to give different browsers a try. ObiTalk uses some scripts to link with Google in getting the GV account authorized. Hopefully this note helps the handful of odd cases like myself who weren't seeing resolution from the standard reset instructions.
Thanks to forum members, especially SteveInWA, who patiently work to resolve users' issues
! I have been enjoying "free" home phone service for 5+ years thanks to my ObiHai 110. I keep wondering each time this happens (about once a year) if "this will be the time it finally dies". Not this time. I appreciate the efforts of those who help us make the most out of these devices.