This is the first time phone access will be available to millions of Facebook users — and another incentive to snap up the company' Messenger app. It's important to note that you don't have to know someone's number to call them, and that you can make a call to anyone with the system in place. The service incurs some charge for data usage when enacted over a 3G or 4G connection, but it is completely gratis when a Wi-Fi connection is in place.
Although at first blush this seems to be the first (and only) productive output from the year-long partnership between Skype and Facebook, this is actually an independent project. Skype and other competitors such as GoogleVoice, Vonage and Viber still offer their services. Still, if Facebook is successful, this product could produce one of the biggest VoIP networks on the planet.