Example image of eyePlorer eyePlorer map for 'GSM': Mobile phone GSM Association 1000000000 (number) Mobile network operator Roaming 2G Digital 3G Enhanced Data Rates for GSM Evolution SMS 1-1-2 Emergency telephone number General Packet Radio Service CEPT European Conference of Postal and Telecommunications Administrations Memorandum of understanding SINTEF Torleiv Maseng European Telecommunications Standards Institute Ericsson Finland Radiolinja Cellular network Femtocell Macrocell Microcell Picocell Antenna (radio) Base station Timing advance Cellular repeater Frequency-shift keying Minimum-shift keying Modulation Frequency modulation Gaussian function Interference (wave propagation) Low-pass filter Electromagnetic interference Detector (radio) Near and far field Time division multiple access Title 47 CFR Part 15 GSM frequency bands UMTS frequency bands Base station subsystem Mobile station Radio frequency Time-division multiplexing Burst transmission