个人通信服务（Personal Communication Service，简称 PCS），是1990年代出现，强调人人可以拥有的流动通信服务。

PCS概念源于英国，最初名为个人通信网络（Personal Communication Network，简称 PCN）。传至美国后改称PCS。其强调以「个人」为中心的流动通信，携带方便、耗电少、而且价格便宜，人人都能负担。技术上PCS较传统第二代流动通信（2G）GSM 850/900、D-AMPS或CDMA（IS-95）便宜是因为改用较高频率波段，使容量及频率重用增加。而由于频率增加后绕射减少，需增加基地台应付，手机秏电也得以减少。

At the most basic level Personal Communications Service or PCS describes a set of wireless communications capabilities which allows some combination of terminal mobility, personal mobility, and service profile management. More specifically, PCS refers to any of several types of wireless voice and/or wireless data communications systems, typically incorporating digital technology, providing services similar to advanced cellular mobile or paging services. In addition, PCS can also be used to provide other wireless communications services, including services which allow people to place and receive communications while away from their home or office, as well as wireless communications to homes, office buildings and other fixed locations. Described in more commercial terms, PCS is a generation of wireless-phone technology that combines a range of features and services surpassing those available in analog- and digital-cellular phone systems, providing a user with an all-in-one wireless phone, paging, messaging, and data service.