ZTE VoWiFi solution adopts standard 3GPP VoWiFi architecture and supports seamless handover with VoLTE to solve the problem of poor signal receiving due to insufficient indoor 4G coverage. ZTE VoWiFi solution explores the values of existing WiFi networks and takes full advantages of frequency resources. It makes the most of home broadband services to significantly reduce the implementation difficulty of VoWiFi. ZTE VoWiFi solution helps carriers to address the problem of poor voice quality indoors and in remote areas. Meanwhile, it shares LTE’s wireless load to gain high coverage ratio and KPI improvement and reduce user churn. Without changing their use habits, the end users can use ubiquitous public WiFi hot spots to make voice and video calls, enjoying low-cost service and best user experience.