Free Voice Calling Rolls Out On Facebook Messenger For iOS... But Only In The US

One of features promised with the Facebook Messenger for iPhone update a few weeks ago was VOIP calling so that you could use the app to call your friends over a mobile or Wi-Fi data connection. Facebook is now rolling that out to all users, but only if you're in the United States.

Would you use Facebook VOIP if it were here in Australia? It could be handy when organising events, I guess?