Free Voice Calls from Facebook's Messegner for iOS (North America only)

It's only been a while since Facebook rolled out their update for the Facebook messenger which had a new feature- which was to send voice messages. But, in their latest update to version 5.5 (I think!) contains yet another new feature, allowing you to call anyone you want for free, if you're living either in the USA or Canada. The only stipulations are that users have the bandwidth to burn and live in either the US or Canada. Otherwise, the interface and functionality are dead ringers for the Messenger equivalents we tried in January. We've seen loads of other apps that let you, or claim to let you make voice calls, but this seems pretty legit! But, there's been no word as to when a version for android or other platforms will be released or whether this feature will be available to other countries. If it becomes available, it probably will be a huge bummer for cellular companies! Lol