Facebook free calling extends to UK iOS Messenger app, still no Android support
Facebook has been taking its time in rolling out free calling between users in its mobile apps. First, the feature came to the iOS Messenger app for users in Canada only .Then, it made its way to all iOS users of the main Facebook app in both the US and Canada. Now, it's being rolled out to the iOS Messenger app for UK users, but still no sign of the feature coming to Android.
It is possible that the update goes beyond the UK to other European countries, but that hasn't been confirmed yet. If you are in the UK and want to give it a try, just make sure you grab the Facebook Messenger app from the iTunes App Store.