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移动通信用户比以前有更多的选择。直至最近，用户的唯一选择是终端移动性，其中用户通过移动终端设备接用一个或多个移动通信网的通信业务。现在这种移动性之外，增加了个人移动性，使用户可以不用终端设备，而用唯一的个人标识号接用上述业务。移动通信的这两种方式的综合正发展成个人通信业务（ＰＣＳ）和通用移动通信系统（ＵＭＴＳ）的各种应用，给用户提供很多前所未有的服务。
Mobile communication users have more choices than before. Until recently, the only option for users was terminal mobility, in which a user accesses one or more communication services of a mobile communication network through a mobile terminal device. In addition to this mobility, personal mobility is added so that users can access the service with a unique personal identification number without the need for a terminal device. The combination of these two approaches to mobile communications is evolving into a variety of applications for Personal Communication Services (PCS) and Universal Mobile Telecommunications System (UMTS), offering many of the unprecedented services to users.