Mobile operators are against to roaming free rules, due to that they will loss their revenue on roaming incoming and outgoing calls. Currently users are paying 1 Rs. for incoming calls, 1.5 Rs. for outgoing calls for one minute. Users also pay 1.5 Rs. for SMS while on roaming. Before applying this rule DoT (Department of Telecommunication) have to follow at all India level Pan-India Unified Licening.
After this rule users will get intra circle number portability. Currently user only get number portability facility in their own circle. If anyone has number from Delhi he cannot use the number in any other state with number portability facility, but after this rule he can able to take any service provider in any other circle.