The new rules will come into effect from December 16.
The MNP request under the present rule will be processed till December 9 and the service will not be available between December 10 and December 15 as entities involved in the process will be migrating their systems to implement new rules.
Besides this, other major changes have been incorporated such as the validity of the Unique Porting Code or UPC has been brought down to four days instead of a fortnight prescribed earlier, for all circles except Jammu & Kashmir, Assam and North East, where the validity of the said code remains unchanged to 30 days, it said.