(With the rapid development of communication technology and the close integration of mobile communication and the Internet, 3G is getting closer and closer to everyone's life. This article mainly describes the various services that 3G may develop, such as multimedia information services, mobile location services, videophone services and mobile e-commerce, and then uses 3G or user groups to analyze 3G's business positioning, and finally On the connection between each link in the 3G value chain.)