If you’ve never heard of VoIP, get ready to change the way you think about long-distance phone calls. Owning an iPhone is cool but there are those with other iDevice who cannot call via their sim card so here are some VoIP app which will help iPhone as well as iPad and iPod Touch user to call.
What is VoIP? Why is it useful?
The full form of VoIP is Voice Over Internet Protocol, with this you can use your internet as a transmission medium for telephone calls. In other words 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.