Thanks to the Voice over IP technology you can use you land line anywhere while saving in your communications Advantages: • Works through Wifi/3G/4G. • Multiple platforms (Android, tablet, iPhone, iPad, PC, Linux y MAC). • Call recording. • Voice Mail. • Virtual Secretary and call filters. • Free calls to other VoIP Duocom users. • Acts as a second phone line. • No connexion fees. • No SIM required. • Cheap local and international calls. • Easy to use. • High quality calls • Technical support