According to Telecom Regulator Authorithy of India, Mobile Number Portability requests has increased to 64.23 lakh subscribers at the end of March 2011 from 38.33 lakh subscribers at the end of February 2011
Overall considering both the zones [zone 1 and zone 2] maximum mobile number portability requests has been made by mobile users in gujrat followed by karnataka
U can see the detailed list below
In March 2011, Vodafone added the maximum number of new users in to its mobile network followed by Bharti Airtel
U can get more information subscriber base of various GSM mobile operators from here
