Vonage has announced its Vonage Mobile application for Facebook, which claims to enable users to make free mobile calls to Facebook friends who also have the app – although potentially subject to data charges from the mobile operator for customers without inclusive data packages. The application is free to download, works with mobile and Wi-Fi connectivity, and is available for Android and Apple iPhone/iPod touch users.

The company said that the app works within a user’s existing community of Facebook friends, so there is no need to remember screen names or input numbers. When making calls, the relevant user photos and status update is displayed on-screen and Vonage Mobile also rings the phone for incoming calls, even if the application is closed.