Facebook Messenger launches free calling for US iPhone users

Facebook Messenger now offers free calling, as the feature has made its way to US iPhone users. The standalone Facebook app allows users to open a conversation with another Messenger user by opening a conversation, tapping the “i” button, and then tapping the new Free Call button. The calls are free using Wi-Fi or the iPhone’s data connection. The VoIP calling service was announced as a new feature about two weeks ago. An App Store update is not needed to start making calls. [via The Verge]