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4. GSMA: 4G Networks to Cover More Than a Third of the Global Population This Year, According to New GSMA Intelligence Data. Number of 4G Operators Worldwide Surpasses 350; 4G Forecast to Account for More Than 30 Per Cent of Mobile Connections Globally by 2020, London (2015)
5. GSMA: GSMA publishes new report outlining 5G future, Brussels (2014)