Broad range of voice and data telecommunications services that enable people to communicate via two-way radio phones based exclusively on digital technologies such as CDMA and GSM. Characteristics of PCS include personal numbers assigned to individuals rather than devices, near-wireline-call-transmission quality, low-power and lightweight mobile devices, enhanced call completion, call billing and call management services. PCS networks operate at 1,800MHz in the U.K. and at 1900MHz in North America.