US iPhone users can now make free calls through Facebook

Starting Wednesday users can now use Facebook(s FB) to make a voice call to another Facebook user. Facebook is soon rolling out an update to its Messenger iOS app with the service, which is free and will work over Wi-Fi or a data connection when it becomes available in the U.S.

Making a call via Facebook Messenger

The Verge noticed the new button first, and Facebook confirmed the service would roll out starting Wednesday. The Messenger app will get a new button that will make calls. It’s voice-only, however; this is not (yet) a service in direct competition with Apple’s own FaceTime app for iPhones and iPads.
Facebook began testing the service in Canada a few weeks ago. Users do not need to update the app; the new feature will show up automatically.