Voice over IP networks
In simple terms one can use the data on one's phone to talk over the internet when you have a VOIP Software program installed on the mobile phone. Both mobile phones need the same software in order for it to be a free callVoice quality depends on the network speed and quality
VoIP converts analog voice signals into digital data packets and supports real-time, two-way transmission of conversations using Internet Protocol (IP).
How is this useful?
VoIP can turn a standard Internet connection into a way to place free phone calls. The practical upshot of this is that by using some of the free VoIP software that is available to make Internet phone calls, you're bypassing the phone company (and its charges) entirely.
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