AXvoice provides free in-network calling to all of its AXvoice VoIP phone users, so enjoy unlimited calls not just within the United States, but also across Canada.
When you use landline, you can only make and receive calls but with AXvoice VoIP, you get hefty savings, 30+ features, and online account management portal. You can find more information about AXvoice features here. AXvoice VoIP isn't just cheaper but better too when compared with the traditional landline.
To use free in-network calling, you need to be an active AXvoice user.