Facebook has introduced a video calling feature to its Messenger app for mobile users connected via Wi-Fi or LTE. The free calling feature is activated by a tap of the camera icon in the chat interface. It is expected to bring new competition to services such as Facetime, WeChat and Skype. The feature — initially rolling out in North America and Europe — is another move by Facebook to expand its offerings. “Just last month, the company introduced a feature that lets Messenger users to send money to each other. A few days later, it opened up Messenger to outside developers, and now users can download dozens of apps to send funny GIFs, personalized emoji and other enhanced messages,” reports The New York Times.