MoSIP is a Mobile Dialer from Voxvalley that allows to make VoIP calls from any of the Windows Phone 8 devices and it uses 3G/Edge/Wi-Fi Internet connectivity. It is developed based on the requirements of VoIP Providers business needs, all you need is brand pin, and start using the application. Features :- It uses SIP protocol based for signaling. Supports G729 codec. Runs behind NAT or private IP. User Friendly Interface. Auto Sync of Balance. Real Time Sip status messages. Call History. Address book integration. Compatible with all sip standard switches. MoSIP has very efficient implementation of jitter buffer to play voice smoothly. Silent suppression and comfort noise generation has been used to reduce the bandwidth usage, and this makes the dialer more efficient in making VoIP calls. It easily integrates with mobiles phonebook and auto detects (+) sign when contact is picked from phonebook.