These will be effective w.e.f. 01-03-2013 in all the circles.
In this regard, it is clarified that “Existing Broadband customers, who are already under Annual/Two year/three year payment option before revision in tariff, they may not be charged the revised tariff till the expiry of their current Annual/Two year/three year subscription".
This circular circulated by BSNL officials in their website...
so it effects from march bill itself who are paying monthly....