Simple and user friendly interface. Integration of native phone book records. Balance display without need of additional balance server setup. Call log facility. Last call duration on screen display after any successful call. Spark dialer Works on Session Initiation protocol (SIP). Sparkdialer Supports Network Address Translation (NAT). Spark dialer Supports Standerd SIP Soft switches. Sparkdialer Works in Edge, GPRS, Wi-Fi, 3G and 4G networks.