Use Google voice with SIP VoIP Phone to make and receive free phone calls within U.S. and Canada

If you are in USA then Google voice is a must for you. Google voice allows you make free calls to any number in USA/Canada and incoming calls to your Google voice number. We have published few articles about using Google voice from various parts of the world to make free calls. Today we will discuss about a free Google Voice SIP service which allows you to use Google Voice from anywhere in the