Scammers collect your personal details — like name, mobile number, Aadhaar, and address — through phishing, leaked databases, or fake customer verification calls. Using these details, they convince telecom operators to issue a duplicate SIM card. Once activated, your existing SIM stops working, and all your OTPs and SMS alerts start reaching the fraudster. This gives them complete access to your online banking, UPI, and credit card accounts.

• ⚠️ Your phone suddenly loses network connection for a long period.
• 💡 You receive notifications for SIM upgrade or replacement you didn’t request.
• ✅ Bank messages or OTPs stop coming to your number.
• 📉 You get alerts for transactions you didn’t initiate.
• 🎯 Customer care calls start asking for personal data or PIN verification.

• Immediately contact your telecom provider’s nearest service centre.
• Request to block the duplicate SIM and verify your identity with original ID proofs.
• Change your bank, UPI, and email passwords immediately.
• Inform your bank to temporarily freeze digital transactions until recovery.
• File a cybercrime complaint and record the service request number for tracking.

Do’s

• Link your mobile number to your Aadhaar securely and never share OTPs with anyone.
• Set strong passwords and enable app-based two-factor authentication.
• Subscribe to email alerts for all banking and wallet transactions.
• Visit telecom stores directly for any SIM-related changes, not via calls.

Don’ts

• Don’t share your 6-digit OTP or SIM PIN with customer care callers.
• Don’t ignore prolonged loss of signal — it could be a SIM swap in progress.
• Don’t use public Wi-Fi to access online banking or OTP-based transactions.
• Don’t store scanned ID proofs on your phone or send them over chat apps.

Recent incidents in metro cities show that scammers often impersonate telecom executives offering “free SIM upgrades to 5G.” Once the user shares details, a replacement SIM is activated without their knowledge. Within hours, multiple bank accounts get emptied via OTP-based transactions. Most victims realised the fraud only after their SIM card stopped functioning.

• Report the issue on cybercrime dot gov dot in or dial 1930 immediately.
• Contact your telecom operator’s fraud management cell.
• Inform all banks linked to your mobile number to monitor suspicious activity.
• Submit an FIR for official record and further investigation.

• 💡 Use biometric login for financial apps whenever available.
• ✅ Keep your SIM PIN enabled to prevent unauthorised swaps.
• 📉 Regularly update KYC details directly at official telecom centres.
• 🎯 Refrain from sharing personal details on job or contest forms online.

The Department of Telecommunications (DoT) has implemented strict KYC norms and introduced “TAFCOP” — a portal to help users verify the number of SIM cards issued in their name. The Indian Cyber Crime Coordination Centre (I4C) also conducts awareness campaigns urging users to secure SIM PINs and report suspicious calls. Staying alert remains the strongest defence against such frauds.

SIM swap fraud can silently unlock your entire digital life to criminals. Act swiftly if your phone loses signal suddenly. Never share OTPs or respond to telecom verification calls without confirming authenticity. Stay cautious and digitally aware — the foundation of financial and cyber safety. Continue reading verified financial insights at Indian-Share-Tips.com, which is a SEBI Registered Advisory Services.