Sipco SoftPhone is a simple yet powerful SIP client for android with advanced features and excellent audio quality. This VoIP Mobile Dialer can be used with any VoIP service provider or softswitch or PBX, including Asterisk, voipswitch, 3CX, Cisco, FreePBX, Nexge, Elastix, OpenSIPS, Kamailio, Freeswitch, iTel Dialer, MVTS etc.