How to Stop Vas Airtel & Vodafone | Stop Value Added Services

Sometime you recharge your phone , then for some unknown reason you see your Main top up balance has been deducted .
Isn't it shocking in a emergency situation .
Then you find there are some VAS has been activated in your number.

VAS means Value Added Service or you can them as Paid services .

So we have to stop this , Lets see how to stop VAS in mobile phones .

Airtel                   *121*5#

Vodafone            Send STOP to 321