Most phone calls are made via the Internet now

By now, the majority of homes and workplaces use Voice over Internet Protocol (VoIP) systems, such as Skype.* These connections are made via the Internet, rather than traditional phone lines. The biggest advantage of VoIP is the cost. PC-to-PC phone calls can be made anywhere in the world, at any time, for free. PC-to-phone connections usually charge a fee, but are generally much cheaper than standard phone services with conventional handsets.
Another advantage is the portability. Phone calls can be made and received from any PC – provided there is a broadband connection – simply by signing into a personal VoIP account. Phone-to-phone VoIP is also portable. When you sign up with a VoIP servicer provider, the Internet phone or adaptor that is used with that service is assigned a unique number. This 'phone number' remains valid even if your VoIP service provider is located in England and you are connected to the Internet in Australia. An Internet phone is small and light enough to take with you anywhere. It can simply be plugged into any broadband connection, anywhere in the world, and used to make and receive calls, just as though you were in your own home or office.
There are several other features that make VoIP attractive. Higher fidelity (wideband) audio, video, call forwarding, call waiting, voicemail, caller ID and multiple-way calling at no extra charge. Digital data such as pictures, documents and other files can also be transmitted during calls.