If you have an Obi110 and aren't using the line port, you can get this NetTalk Duo and use it like a landline with your Obi110.
$20 includes the first year of service and gets you free calling, voicemail, forwarding etc etc. And
free 411, 911 & CNAM. After the first year the service is $30 a year. And they have a smart phone app too.
Number porting is free for a limited time. See all their number porting info here
http://www.nettalk.com/en/porting/faqhttp://1saleaday.com/?CID=168142&AFID=183678NOTE: NetTalk uses early media so you don't want to use it as a forwarding phone with google voice. The Duo actually answers every call and then continues to ring the phone port, routes the call, forwards the call etc. So all forwarding phones in GV will ring once, then stop because the NetTalk took the call.