What Does GSM Stand for?

The T-Mobile PCS network uses GSM technology. GSM stands for Global System for Mobile Communications.
GSM is the international digital radio standard created by the European Telecommunications Standards Institute.
GSM allows users to roam freely among markets. It has become the globally accepted standard since the first systems
began commercial operation in 1991. In the United States, the American National Standards Institute (ANSI) has accepted
GSM-based mobile phone 1900 as a standard for the mobile phone frequencies allocated by the Federal Communications Commission (FCC)
at 1900 MHz.