I have similar issue last night with my obi100. Spent 2 hours with no luck. I tried again this morning and the problem presented after I set up my google voice (add device, input google info, etc.) then the phone light keep blinking even after I took the phone line off. Here are what I did:
step 1-connect phone, internet, and power (normal, two solid lights)
step 2-dialed **9 222 222 2222 (normal, can hear echo but fuzzy)
step 3-add a device (successfully done)
step 4-add a google voice number (the phone light keep blinking even after I took the phone line off. With the phone line on, there was no dial tone at all).
This was the second installation after the official update. Tried unplug the power for 15 min, but it worked only for a while.
Any suggestion?