Interdigital Keysight Technologies Viavi Associates - ~85 including Analysys Mason Boston Consulting Group ComReg CTIA Doro AB HP Enterprises IFT (Instituto Federal de Telecomunicaciones) ITU (International Telecommunication Union) LGS Innovations Mavenir Microsoft Ofcom Plum Consulting Quectel Rohde & Schwarz Sony Syniverse Vodacom SA See also Supplier association References External links Official website GSM standard UMTS Telecommunications organizations Mobile phone industry