According to Anupam Shrivastava, CMD BSNL, BSNL is open to spectrum sharing and some discussions are going on with Airtel for the same. It is for four circles and according to the CMD, it may be finanlised by June this year. This information is published in the Business Line dated 11-03-2016.
Full details are, however, not available. Whether this will benefit BSNL or not can be understood, when all the details are available.