What do you mean by Mobile Number Portability?

“Mobile Number Portability” means the facility which allows a subscriber to retain his mobile telephone number when he moves from one Service Provider to another irrespective of the mobile technology or from one cellular mobile technology to another of the same service Provider. Hence one can port a CDMA number to GSM and vice versa.

In India it is currently available for intra circle only. However due to the configuration of each Telecom circle porting can also happen between Madhya Pradesh & Chhattisgarh; Bihar & Jharkhand; Rest of West Bengal & Andaman and Nicobar; within the states of the North East excluding Assam.