The Cellular Operators Association of India (COAI) had requested the Department of Telecommunications (DoT) to set up a coordination committee and to extend the deadline for implementing full MNP.
"In consideration of the same, the Department has constituted a committee but the request of COAI to extend the deadline for full MNP has yet not been agreed," Telecom Minister Ravi Shankar Prasad said in a written reply to the Lok Sabha.
He said DoT has carried out amendment in the MNP licence agreements for rolling out full MNP by May 2015.
On a question whether action is proposed to be taken if operators fail to meet the deadline, Prasad said: "The deadline for rolling out full MNP is yet to be reached and further course of action shall be decided thereafter."
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Government has set May 3 as the deadline for mobile operators to start full MNP service.
At present, MNP allows subscribers to change mobile network while retaining their number in the same telecom circle.