https://wccftech.com/facebook-is-bringing-video-and-voice-calling-back-to-its-main-app/

According to a latest report, Facebook is bringing voice and video calling back to its main app, a feature which now lives in Messenger.

If you’re been using Facebook’s mobile app for quite a while, then you already know that video and voice calling is a feature that lives exclusively in the Messenger app, which was launched in 2011. Facebook removed voice and video calling from the main app completely and made it part of Messenger in 2014.