If you won’t pay your Vodafone Postpaid Bill of the SIM, for the 1–2 months the company will only charge you some amount for but will also tell you that they are about to disconnect the connection.
If you’ll not pay the bill or disconnect the connection without paying bills, the customer care will keep calling you and after some months they’ll put you in defaulter which will definitely going to impact on your CIBIL score..
After the warning you will receive an notice from the company that you haven’t paid the bill and cause of that the company might take some legal actions against you.
So, it’s better to pay your bills in order to get notice or Blacklisted from the SIM operator of your device.