http://www.voip.com/voip_articles.aspx - If you make many international phone calls, you may want to consider looking into residential VoIP providers. With home phone VoIP, you can telephone someone on the other side of the world for a flat rate, which is generally very low. This is because a home VoIP service uses the internet to make calls and that is very different from conventional telephone lines. Residential VoIP providers generally also allow you to make free phone calls to people using the same service.