Duck VoIP 220.127.116.11
Duck VoIP is a Mobile VoIP dialer application that allows to make VoIP calls from any of the Windows Phone 8 devices and it uses 3G/Edge/Wi-Fi Internet connectivity.
Duck VoIP uses SIP protocol based for signaling.
Duck VoIP Supports G729 codec.
Duck VoIP run Behind NAT or private IP.
User Friendly Interface.
Auto Sync of Balance.
Real Time Sip status messages.