Navigate to Help & Support → Type “Block SIM card.”
Losing access to your mobile number isn't just inconvenient—it’s a security risk. Airtel allows registered users to block a lost or stolen SIM online, preventing unauthorized OTPs and misuse. how to block airtel sim online
If you cannot access the app or web (no internet), call 121 from another Airtel number or 198 from any phone to block immediately. Navigate to Help & Support → Type “Block SIM card