Jettel

Jettel Softphone has come up for Android based Mobile phones. Jettel Softphone lets the callers make calls through their standard Mobile phones. The iPhone dialer works just like standard Softphones i.e. it gets registered on the server and then let the authentic caller makes calls. The mobile phones need to be connected to the internet either through Wi‐Fi/3G/4G.

Jettel Softphone is meant for service providers who can use this dialer and get it integrated with their existing SIP servers.
This softphone also turns your Android into a VoIP phone, so you can make cheap or even free phone calls over the internet at anytime, and from almost anywhere.
Jettel Softphone is designed specifically to leverage the Android's unique capabilities and easy way to make a iPhone voip call by using Android devices.
Featuring a comfortable and simple user interface Jettel Softphone lets you connect your device to standard landline or mobile phones.