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http://apps.facebook.com/vonage-talk...kes-US-Android

Excerpt from the link


iPhone® or Android™ OS users get a direct download link sent to your smartphone.


To download the app directly to your phone, enter your 10-digit U.S. mobile number below.

After submitting your mobile number, follow the steps below on your mobile device:


Click the link in the text message to download the app.
(Standard text messaging rates may apply.)

Launch the app and log in with your Facebook® username and password.

Now you're ready to make your first free call to any of your Facebook® friends who have the app.