DoT Issues Stern Warning: Tampering With IMEI or Misusing SIMs Can Mean Three Years in Jail and a ₹50 Lakh Fine

The Department of Telecommunications has issued a fresh public caution against tampering with IMEI numbers and misusing other telecommunication identifiers, making it clear that these acts are not technical shortcuts but serious criminal offences. In an official statement dated 31 August 2026, the ministry said such misuse can put ordinary citizens at risk and damage the security of India’s telecom networks. The warning comes as mobile connectivity and digital services continue to expand across the country, and as fraudsters keep finding new ways to hide behind cloned devices, fake SIMs and manipulated caller identities.

At the centre of the advisory is a simple idea: every phone and many other connected devices carry unique identifiers. When those identifiers are altered, sold, rented or obtained through fraud, they become tools for cybercrime. The government says the law is already in place. What it wants now is public awareness, so that people do not walk into legal trouble without realising it.

What an IMEI number is and why changing it is dangerous

The International Mobile Equipment Identity, or IMEI, is a unique 15-digit number assigned to a mobile handset and certain other radio equipment. It identifies the device on the network, independent of the SIM card. Telecom operators, law-enforcement agencies and the government’s own systems use IMEI data to track stolen phones, block blacklisted devices and investigate fraud.

When someone tampers with an IMEI, they are trying to make a device look like another device. That can hide a stolen phone, disguise equipment used for illegal call routing, or help criminals operate SIM boxes and other tools used in bulk fraud. The same logic applies to other identifiers: caller line identity, SMS headers, and even SIMs obtained in someone else’s name. Once those identifiers are no longer reliable, it becomes harder to know who is actually making a call, sending a message or running a scam.

DoT has said this kind of misuse is no longer a grey area. It is a punishable offence under the Telecommunications Act, 2023 and the rules framed under that law.

The legal provisions citizens need to know

The Telecommunications Act, 2023 contains several clauses that deal directly with this problem.

Section 42(3)(c) prohibits tampering with telecommunication identifiers. That includes the IMEI of mobile phones and other telecommunication devices.

Section 42(3)(e) prohibits obtaining SIMs or other telecommunication identifiers through fraud, cheating or impersonation.

Section 42(3)(f), which has been highlighted in earlier government advisories as well, makes it an offence to wilfully possess radio equipment — including a handset, modem, module or SIM box — knowing that it uses unauthorised or tampered identifiers.

The penalty is severe. A person found guilty can face imprisonment of up to three years, a fine of up to ₹50 lakh, or both. These offences are cognizable and non-bailable under Section 42(7). That means the police can arrest without a warrant, and bail is not a matter of right. Section 42(6) applies the same punishment to anyone who abets or promotes the offence. In other words, helping someone else change an IMEI, assemble a tampered device, or traffic in fraudulent SIMs can attract the same sentence.

The Telecommunications (Telecom Cyber Security) Rules, 2024 add another layer. They prohibit a person from altering an IMEI, and also from using, producing or possessing equipment in which the IMEI can be configured, changed or altered. Devices with programmable or reconfigurable IMEIs are treated as tampering, not as a clever hardware feature.

This is not a new theme. DoT has previously cautioned manufacturers, importers and sellers about mandatory IMEI registration and the consequences of selling equipment with configurable identifiers. The latest statement is aimed more directly at ordinary users, because many people still do not realise that buying a cheap “unlocked” device, handing over a spare SIM, or using an app that hides the real caller ID can pull them into a criminal case.

What the government says people must not do

DoT’s list of things to avoid is practical and specific.

Citizens should not use, procure or assemble devices such as modems, modules, SIM boxes or other equipment that have configurable or tampered IMEIs. These devices are often marketed as business tools for bulk calling or “gateway” services. In practice, they are frequently used to mask origin, route international calls illegally, or run fraud operations.

People should not obtain SIM cards through fake documents, fraud, cheating or impersonation. That includes using someone else’s ID, buying SIMs from unofficial agents who skip KYC, or agreeing to get a connection “in your name” for a fee.

They should not transfer, sell or hand over SIMs obtained in their own name to others who may misuse them. This is one of the most important points in the advisory. A large number of cyber-fraud cases involve SIMs that were issued legally to one person and then passed on to criminals.

They should not use mobile applications, websites or any other method to modify Calling Line Identity or other telecommunication identifiers. Apps that promise to hide your number, display a fake caller name, or make a call appear to come from a bank or government office fall in this category.

DoT has also warned that procuring a SIM in your own name and then loaning, renting or “muling” it for cyber fraud or other unlawful activity can make the original subscriber legally liable. That sentence should worry anyone who has ever given a spare SIM to a relative, a tenant, a workplace, or a stranger who offered money for it. If that SIM is later used in a scam, investigators can start with the person whose name is on the connection.

The department’s language is blunt: using devices with tampered IMEI numbers, obtaining SIMs through fraudulent means, or transferring SIMs to people who misuse them can have serious legal consequences.

Why SIM “muling” has become a major risk

SIM muling is now a common method in digital fraud. Criminals recruit people — sometimes students, job-seekers or low-income workers — to take SIMs in their own names and hand them over. The mule may be paid a few thousand rupees. The SIM is then used for phishing calls, fake KYC, OTP theft, investment scams or mule-account operations.

The original subscriber often believes they have no role in the crime because they did not make the calls themselves. The new advisory undercuts that assumption. If the SIM was taken in your name and then used for unlawful activity, you may still face legal liability. Combined with the fact that these offences are cognizable and non-bailable, that is a high-stakes warning.

The same logic applies to second-hand phones and unofficial repair markets. A phone with a changed IMEI may look cheaper or “unblocked.” It may also be a stolen device, a cloned device, or equipment that networks are required to block. Buying or using it is not a victimless bargain.

How citizens can check their phones and connections

DoT is asking people to use the government’s own digital tools instead of random websites that claim to “check IMEI” or “unlock” a phone.

The Sanchar Saathi initiative is the official platform for this. Citizens can verify IMEI details of a mobile handset through the Sanchar Saathi portal or the Sanchar Saathi mobile app. The service can show the brand name, model name and manufacturer information linked to that device. That helps a buyer confirm whether a phone matches what the seller claims, and whether the identifier looks legitimate.

The portal is available at http://www.sancharsaathi.gov.in. The official app is listed for Android on Google Play and for iOS on the App Store. DoT says the government has put in place measures to prevent misuse of telecommunication resources and to strengthen the safety of India’s telecom ecosystem. People can use the citizen services on Sanchar Saathi to verify and protect both their mobile connections and their devices.

This is useful in everyday situations: buying a used phone, checking a device after repair, confirming how many SIMs are issued in your name, or reporting a connection you no longer control. The advisory does not treat Sanchar Saathi as optional marketing. It presents it as the practical way for a citizen to stay on the right side of the law.

The larger purpose behind the warning

India’s digital economy now runs through phones: banking, UPI, Aadhaar-linked services, delivery apps, work logins and government portals. When identifiers can be faked, the entire chain becomes weaker. A cloned IMEI can keep a stolen phone on the network. A mule SIM can be used to open accounts or receive OTPs. A spoofed caller ID can make a fraud call look like it is coming from a bank or a police officer.

The government has been tightening this space for some time — first through the Telecommunications Act, 2023, then through the Telecom Cyber Security Rules, 2024, and through earlier cautions to manufacturers and sellers about mandatory IMEI registration on official portals. The latest statement is a reminder that the same rules apply to ordinary users, not only to factories and importers.

DoT’s closing message is that compliance is essential for preventing telecom-related fraud, protecting citizens, and keeping the telecommunication environment safe and trusted. The law is already written. The penalty is already high. The remaining question is whether people treat a cheap device, a spare SIM or a “caller ID changer” app as a convenience — or as something that can put them in a non-bailable criminal case.

For most users, the safest course is straightforward. Buy phones from reliable sources. Do not change or hide device identifiers. Do not take SIMs for other people. Do not hand over SIMs issued in your name. Check devices and connections on Sanchar Saathi. And treat any offer to “fix,” clone or reprogramme an IMEI as a red flag, not a service.

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