Call divert number in BSNL for missed calls when the phone is in swithched off?

the call divert number in BSNL for missed calls is 17010

Let me tell u the trick. the trick is that -- when u want to talk to someone dear and don't want anyone to disturb u or rather don't want anyone to know that ur phone is busy or engaged, u just need to do is before making the call activate this by going to call divert function and diverting all voice calls to the number 17010 and after its activated whoever calls u will get to hear that u r not reachable or are out of coverage area. this way u don't get caught and the best part being that u receive a sms stating which call u missed.