Earlier this month, Facebook updated its Messenger iOS app with beta support for making VoIP calls between Facebook accounts. That feature was initially limited to Canadian iOS accounts but is now being opened to all U.S. accounts, reports The Verge. To access voice calling, open the Facebook Messenger app, open a chat with someone, and click the 'i' button in the top right corner. If the feature has been activated -- and the other user also has Facebook Messenger for iOS installed -- there should be a "Free Call" button. If it's greyed out, try tapping it anyway. Facebook is rolling out ... Read More