Call Airtel customer care and request SIM blocking
Use the Airtel Thanks app if your SIM is linked and accessible
Visit the official Airtel website and use the support or complaint section
Use Airtel’s online chat support to report the SIM as lost or stolen
Submit a SIM block request through Airtel’s customer support email or web form
Provide your mobile number, registered name, and identity details for verification
Ask for a duplicate SIM after blocking the old one
If needed, visit the nearest Airtel store with valid ID proof to complete the process