The quickest way to block your Airtel postpaid SIM is by calling Airtel's customer care. You can dial 198 (toll-free) from any Airtel number or 011 3958 1111 (for Delhi) if you're calling from a non-Airtel number. Keep your account details and personal details handy.
You can also request to block your SIM through the Airtel website or the MyAirtel app. how to block airtel postpaid sim
The store will issue a new SIM with the same number (if you want) or close the account. The quickest way to block your Airtel postpaid
Dear Airtel, My postpaid number [10-digit number] is lost/stolen. Please block the SIM immediately to prevent misuse. My alternate contact number: [your other number] Thank you. how to block airtel postpaid sim
If you still have access to your Airtel account on another device: