Skype is a VoIP service, which uses the Internet to allow people to make and receive free voice and video calls online for free or for cheap. VoIP has during the past decade showed the way to communicators how to go around the expensive PSTN and cellular plans and make international calls for free or cheap. Skype is the app and service that has made the world know about it. Many people today attach the idea of calling for free on the Internet to Skype only. It has been the most popular VoIP app and service for many years, although it is no longer so today.
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Skype has broken many barriers to communication. While in the past you needed to take particular care of the minutes and seconds you spend speaking on international calls, you no longer need to bother about that now. If you use Skype to make PC to PC communication, you pay nothing more than the monthly Internet service, which you would anyway have paid without Skype.
Skype reached a summit of more than half a billion registered users, although these days, its user base contains no more than around 300 million users.
Skype is changing how people communicate with the integration of voice and IM (Instant Messaging) into one application. Later on, Skype added video calling and conferencing on its app such that you could talk to people face to face online for free.
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