While Americans and Canadians have enjoyed making app-based voice calls to their Facebook contacts since January, their overseas buddies have missed out, until now. The social network's iOS Messenger app has now doled out its calling feature to the UK and presumably other parts of Europe, although we haven't been able to confirm where yet. It's not enabled on the Android iteration yet, either. The calling serviceisn't powered by Skypethis time, although it works in a similarly uncomplicated way, with the ability to leave voice messages with any busy users. According toPocket-lint, this is an experimental version, warning that you might experience a few bugs and glitches as you play around with it, but hey, you're getting free calls to (most of) your friends. We've tested the new feature and it's working for several of our editors, even over 3G signal, but if you haven't already picked up Facebook's dedicated messaging app yet, grab it at the source below.