SIM swap fraud is when a criminal gets a duplicate SIM for your mobile number, usually using forged documents or by tricking telecom staff, and then receives your OTPs. Yes, it happens in India. If your signal disappears unexpectedly, call your telecom operator from another phone, freeze your bank access and call 1930 immediately.
Key takeaways
- Sudden, unexplained loss of network on your SIM is the main warning sign.
- Call your operator from another phone to block the duplicate SIM, then call your bank.
- Telecom rules now restrict SMS services for a period after a SIM replacement.
- Never share the code from a 'SIM upgrade' or 'eSIM activation' message with anyone.
- Check Sanchar Saathi for any mobile connections taken in your name.
What is SIM swap fraud, and is it possible in India?
SIM swap fraud, also called SIM replacement fraud, is an account takeover. The criminal does not hack your phone. Instead, they get your mobile number moved onto a new SIM card or eSIM that they control. From that moment, your calls and SMS, including bank OTPs, go to them.
Yes, it is possible in India, although telecom rules have been tightened. Criminals usually first collect your details through a phishing link, a fake KYC call or a data leak, then either forge an ID to request a duplicate SIM at a store, or trick you into approving an eSIM or "4G/5G upgrade" request.
This is different from your phone being hacked or tracked. If you suspect spyware, stalkerware or location tracking on the device itself, read our guide on how to check if your phone is hacked or tracked. A SIM swap leaves your phone untouched; it steals the number.
What are the signs of SIM swap fraud?
- Sudden "No service" or "SIM not registered" on your phone in an area where you normally have signal, which does not fix itself after a restart.
- An SMS or call about a SIM replacement, eSIM activation or "upgrade" that you did not request.
- Calls asking you to reply to an SMS with a code or to press a key to "avoid disconnection".
- Emails about login, password reset or new device from your bank, email provider or social media while your phone is silent.
- Friends say they got odd messages from your number or WhatsApp.
A dead signal alone may just be a network problem. But a dead signal combined with any of the other signs should be treated as an emergency.
What to do immediately if you suspect a SIM swap
Use another phone, a landline or a family member's number. Work quickly through this list:
- Call your telecom operator's customer care and tell them you did not request a SIM replacement. Ask them to block the new SIM and reissue one to you in person after verification. Visit an official store with your original ID if needed.
- Call your bank's official helpline to block net banking, UPI and cards linked to that number, and to stop any change of registered mobile number.
- Call 1930 and file on cybercrime.gov.in, especially if money has already left your account.
- Secure your email first from a trusted device, because email is often the key to resetting everything else. Change the password and remove unknown recovery numbers.
- Warn contacts that messages from your number or WhatsApp may not be from you. If WhatsApp has been taken over, follow our guide on recovering a hacked WhatsApp, Instagram or Facebook account.
- Write down times: when the signal went, when you called the operator and bank. Under RBI's customer-liability rules, prompt reporting of a third-party breach can protect you from bearing the loss.
Who does what: telecom operator, bank and police
| Who | What to ask for | Why it matters |
|---|---|---|
| Telecom operator | Block the fraudulent SIM, reissue to you, written confirmation of when and where the duplicate was issued | Stops OTPs going to the fraudster; the store record is key evidence |
| Bank | Block channels, record a fraud complaint, freeze change of mobile number, provisional credit if eligible | Limits further loss and starts the refund process |
| 1930 / cybercrime.gov.in | Fraud complaint with transaction details | Lets police freeze money in receiving accounts |
| Local police / cyber cell | FIR for cheating, forgery and identity theft | Police can obtain the store's KYC documents and CCTV through legal process |
| RBI Ombudsman | Complaint if the bank refuses or delays | Independent review of the bank's decision |
A duplicate SIM issued on forged documents involves several offences, typically cheating (BNS s.318), forgery-related offences under the BNS, and identity theft and cheating by personation (IT Act s.66C and s.66D). The details of the bank refund process are explained in our guide to bank and card fraud.
How to prevent SIM swap in India
- Never share codes from SIM-related SMS. A message about a SIM swap or eSIM request is for you to reject, not to forward.
- Do not share photos of your Aadhaar, PAN or other ID with unknown callers. Where you must share an ID, use a masked Aadhaar and write the purpose on the copy.
- Lock your Aadhaar biometrics on the UIDAI website or mAadhaar app, so your fingerprints cannot be misused for e-KYC. Unlock only when you need to.
- Use app-based authentication instead of SMS OTP wherever your email and social media allow it.
- Turn on email alerts from your bank, so you are notified even when your SIM is dead.
- Check "Know mobile connections in your name" on Sanchar Saathi every few months and report any connection you do not recognise.
Telecom rules in India now also restrict SMS services, including incoming commercial and OTP messages, for a period after a SIM is replaced. This gives the real owner a window to notice and object.
How do you check which SIMs are registered in your name?
- Visit sancharsaathi.gov.in or open the Sanchar Saathi app.
- Choose the option to know the mobile connections in your name.
- Enter your mobile number and the OTP you receive.
- Review the list. Mark any number that is "Not my number" or "Not required" so the operator can verify and disconnect it.
Unknown connections in your name can mean that your ID has been misused more widely, for SIMs, loans or accounts. If you find any, read our guide on identity theft through PAN and Aadhaar misuse.
Can a private detective help in a SIM swap case?
Telecom records, store KYC files and call details can be obtained only by police under legal process; a private detective who claims to access them is breaking the law. A detective can lawfully help when the fraud seems to involve someone who knows you, such as a person who had access to your ID documents, by gathering open-source and witness information for your police complaint. A verified professional through Hire Your Detective can tell you whether that is worth doing in your case.
Bottom line
A dead SIM with strange messages is a red alert. Call your operator and bank from another phone, call 1930, and secure your email. Prevent it by never sharing SIM-related codes or ID copies with callers, locking your Aadhaar biometrics and checking Sanchar Saathi regularly. For general complaint tracking, see our guide on reporting cyber fraud in India.
Sources & official links
This guide is general information, not legal advice. Laws and procedures change, and every case is different — speak to a lawyer about your situation. In an emergency, call 112.