Zoiper IAX SIP VOIP Softphone for PC or Mac – Windows 7/8/10 – Free Download
Zoiper IAX SIP VOIP Softphone is a free android application for making VoIP calls over 3G/4G or WiFi.
Zoiper provides a very easy and simple interface that offers a high quality of voice over IP experience.
At the moment you can download Zoiper for Android & iOS devices, but it also could be opened on your PC using BlueStacks App Player.