भारतीय दूरसंचार विनियामक प्राधिकरण Telecom Regulatory Authority of India 
Direction to All Access Service Providers (Wireless) and MNPSPs with regard to discontinuation of 2G/GSM Services and upgrading of Network from CDMA to LTE/4G in 800 MHz band in various licensed service areas by M/s Reliance Communications Ltd
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