1.GSM’s Achievements 2.The Agreement on the Concepts and the Basic Parameters of the GSM Standard 3.The Detailed Specification Work Leading to the GSM Phase 1 Standard used 4.Consolidating GSM Phase 1 and Evolving the Services and System Features 5.Evolving the Services and System Features to Generation 2.5 by the GSM Phase 6.GSM Goes to North America 7.The UMTS Related Work of the European Commission, UMTS Taskforce 8.The UMTS Standardisation Work in ETSI 9.The Third Generation Partnership Project (3GPP) 10.Services and Services’ Capabilities 11.System Architecture Evolution. 12.Radio Aspects 13.The Subscriber Identity Module, Past, Present and Future 14.Voice Codecs 15.Security Aspects