BOD stand for Bandwidth on DemandWhen you activate a different service your can enjoy the bandwidth it comes with.Now if let say your Plan is 256 Kbps on this it may be difficult to have Video chat. so you are left with 2 options option 1> upgrade your plan to say 1 Mbps. and pay for the full monthor option 2> activate BOD. when you activate it you will get speed's of 1 Mbps so you can have a video chat. as soon as you are done with it. you can disable BODso you will be charged BOD rates for that session only.
If our bsnl AEO/Je is to be believed it has been activated. but the constraint is that you have to adhere to that service for half a month, If i understood what he said, It will be like you would be subscribed for that plan temporaily.
wait for some time till one billing is done.