Idea Cellular has been the biggest net gainer of mobile subscribers though MNP service, as per data till October, 2014 presented in the Lok Sabha by the minister.
"The public sector companies, i.E. BSNL and MTNL have not lost the maximum number of subscribers cumulatively since the launch of MNP in the country," Prasad said in a written reply to the Lok Sabha.
The MNP service allows mobile subscribers to change their service provider while retaining their existing numbers.
BSNL net loss of subscribers was over 22 lakh and MTNL lost over 2.7 lakh customers. MTNL , however, lost about 4 times more number of customers than it gained.
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Only four operators have gained subscribers through MNP-- Idea, Airtel, Vodafone and RCom subsidiary Reliance Telecom.
Idea net gain of subscribers at the end of October 2014 stood at over 1.25 crore, Vodafone gained over 1.04 crore, Airtel 50 lakh and Reliance Telecom over 3.84 lakh subscribers, as per the official.