Not for me since I joined before mar31. But I thought I saw someone post here that they joined after that still no extra charges... but beware BSNL might suddenly drop a bill on your head... sof if you joined after mar31 assume that yes you'll get bills for extra downloads at the rate they mentioned... was it rs 1 or 2 per mb?
If your work order date falls before march 31, u r safe. They charge Rs.2 / 1.5 per additional MB according to plans.According to me, use the service wisely so that you might not get thunderstruck on receiving a fat bill of nearly 10k !! And wait for June 30.