Facebook's New Video Chat Service

Facebook is rolling out it's own new free video and audio service, at least to those of us who use the Facebook mobile app. You can turn off video if you like, and just use voice as you would with a regular phone call. Facebook partnered with Skype in 2011 to provide a video chat service, but this is new offering is their own technology.
Unlike other video calling apps, Facebook Messenger calls will work whether you are connected to the Internet via WiFi or cellular data, such as 3G or 4G.
When WiFi is available, all audio and picture data is sent using VOIP (Voice Over Internet Protocol) and doesn't count toward data usage on a cellphone plan, which can be expensive. If WiFi is not available, the app will use cellular transmission.

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