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Vonage Makes Free Facebook Phone Call App 115

crimeandpunishment writes "Vonage has developed a new application for the iPhone and Android that provides free phone calls between Facebook users. Vonage's CEO says 'Essentially, we've given Facebook a voice.' Users sign in, see a list of Facebook friends who also have the app, and if they tap on a name a call is placed ... and it will go through even if the app isn't running on the friend's phone. The calling, which works over cellular broadband and Wi-Fi, doesn't use calling minutes but will use up data."

I have a theory that it's impossible to prove anything, but I can't prove it.