Bharat Sanchar Nigam Limited, Tata Tele Services Limited, Tata Tele Services Maharashtra Limited, Reliance Communications Limited, Reliance Telecom Limited, Aircel, Vodafone, GTL Infrastructure Limited, Vodafone Essar Cellular Limited, Vodafone Essar South Limited, KEC International, Quipo Telecom Infrastructure Limited, Aircel Digilink India Limited, Fascel Limited, Dishnet Wireless Limited, Bharti Airtel Limited, Bharti Hexacom Limited, Idea Cellular Limited, Shyam, HFCL, Sasken Communication Technologies Limited, Reuters India Private Limited, Unitech Wireless (Tamil Nadu) Private Limited and Videocon Telecommunications Limited.