This app, in conjunction with Google Voice, lets you make unlimited calls to any phone in the U.S. or Canada using the data connection of your mobile device (including Wi-Fi and/or 3G,4G) without using your mobile minutes. Once you get a free public phone number from Google Voice, use this app to make or receive calls to/from anyone in the world. (To learn how to get a free US phone number, low international calling rates, or any other details, please visit the Google Voice website google.com/voice.)



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