I bought my Obi100 last August, 2011. I set it up with Google Voice.
It worked fine up until about 4 to 6 weeks ago. Sometimes when placing a call, it will ring twice, and then silence. If I re-dial, the same thing happens. Eventually I have to give up and use my cell.
But if I try another number, then the call goes through! If I call back the failed number, I get the two rings.
This has happened with several numbers so it's probably not an issue with the number I'm calling (besides, it just started happening a few weeks ago).
I tried re-booting my Obi but it did not help.
Any ideas?