Make Your Smartphone a Walkie-Talkie - David Pogue - NYTimes.com

Now use your Smartphone / IPads as a Walkie Talkie!
You might think that we’ve exhausted every variation on electronic communication — text, audio, video — but you’d be wrong. A new one is quietly winning over millions of gadget fans. They’re free apps with names like Voxer, HeyTell and Zello, and they really do mess with the rules of the game. --------Zello, HeyTell and Voxer Make Your Smartphone a Walkie-Talkie - David Pogue - NYTimes.com

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