It lets Vringo users import their Facebook friends’ profile photos to their mobiles, automatically matching them to contacts. When Facebook friends call one another, their friend’s photos will appear on their phone screens as a type of visual caller ID.

The app will initially be offered free on a global basis for BlackBerry and Windows Mobile devices. It will be available for additional handsets in the near future.

Vringo’s flagship service lets subscribers use their buddy lists to deliver video clips, ‘Vringos’, announcing the caller to the person being called, or to identify an incoming caller. Users can also choose licensed content from providers such as Discovery Channel, Universal Music, Turner and Agence France Presse.