article_snippet: Voice over Internet Protocol (VoIP) lets people make free, or low cost, telephone calls over the web.
article_snippet: Popular VoIP services include Viber and Skype.
article_snippet: Popular VoIP can be used anywhere in the world and can call landline and mobile numbers.
article_snippet: The 'Calls' feature requires an internet connection and works in a similar way to how Skype connects web-based calls - a service known as 'voice over internet protocol' or VoIP.