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GSM World
The GSMA represents the interests of the worldwide mobile communications industry. Spanning 219 countries, the GSMA unites more than 750 of the world’s mobile operators, as well as 200 companies in the broader mobile ecosystem.
3GPP
The production of Technical Specifications for a 3rd Generation Mobile System based on the evolved GSM core networks.
GSMArena
GSMArena.com - GSM phone reviews, news, opinions, votes, manuals and more...