After coming jio BSNL release many types of recharges like unlimited calling , unlimited data etc. If you wants to port out your number free of cost then you have to port in bsnl . The plans of bsnl are also good like
349 = unlimited calling to any net + 2 GB data for 28 days
333= get daily 3 GB data for 90 days
395= get 3000min for bsnl net + 1800min for other net + 2 GB data per day for 71 days