BOSS has come up with " SIP Client for Android (Voip)" for android based Mobile phones. Android VOIP Mobile Softphone lets the callers make VoIP calls through their standard Mobile phones. It works just like standard SIP app for Android i.e. it gets registered on the SIP server and then let the authentic caller makes calls. The biggest advantage that this Android voip provides is the huge base of potential customers who can now make calls using their standard mobile phones. The mobile phones need to be connected to the internet either through GPRS/EDGE/Wi-Fi/3G / 4G .