Bellcom is a Mobile VoIP dialer application that allows to makeVoIP calls from any of the Android devices and it uses3G/Edge/Wi-Fi Internet connectivity.It is developed based on therequirements of VoIP Providers business needs Features :- Bellcomuses SIP protocol based for signaling. Supports G729,PCMU, PCMAcodecs. 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 standardswitches. It has very efficient implementation of jitter buffer toplay voice smoothly. Silent suppression and comfort noisegeneration has been used to reduce the bandwidth usage, and thismakes the dialer more efficient in making VoIP calls.