The loss of a smartphone or its theft is a stressful situation that requires an instant response. Owners of devices based Android often ask whether it is possible to turn a stolen gadget into a useless “brick” using its unique identifier. The answer is clear: yes, blocking by IMEI is the most reliable way to protect the device from further use in cellular networks.
However, this procedure does not happen automatically and requires the owner to perform a number of legal and technical actions. Simply pressing a button on the Internet is not enough, since only authorized organizations and telecom operators have access to the register of prohibited devices. In this article we will analyze in detail the entire process, from searching for the code to interacting with law enforcement agencies.
It is important to understand that blocking by international equipment identifier does not erase data from the memory card and does not delete accounts if the device was not connected to the network at the time of the command. This is a measure to restrict access to a cell tower, and not to delete information. However, this is a critical step to prevent fraud with your SIM card and calls at your expense.
What is IMEI and why do you need it for blocking
IMEI (International Mobile Equipment Identity) is a unique 15-digit number assigned to each mobile device during production. It can be compared to a fingerprint or passport serial number for your smartphone. It is this code that is used by cellular operators to identify equipment in their network.
When you apply for blocking, the operator enters this number into a special “blacklist” (Blacklist). After this, the device loses the ability to register in the networks of all operators operating in a given country, even if the attacker replaces yours SIM card with his own. The phone will show the network, but any attempts to make a call or access the Internet will be interrupted.
It is worth noting that modern smartphones with support for two SIM cards may have two IMEI numbers - one for each slot. To completely lock the device, both values must be provided to the operator. You can find them on the device box, in the warranty card, or directly in the phone settings if you have access to it.
⚠️ Attention: In some regions, there are paid services that offer “remote IMEI blocking” through third-party databases. Be careful: officially in Russia and many CIS countries this service is provided only through the telecom operator and the police free of charge. Third-party services are often fraudulent.
How to find the IMEI of a locked or lost phone
The biggest problem when you lose access to a device is the inability to see the settings. If you have the phone in your hands, the code is usually displayed when you enter the combination *#06# on the dialing screen. But what to do if the gadget is already lost? There are several legal ways to obtain this information after the fact.
The first and most reliable source is the original packaging from the smartphone. There is always a sticker with a barcode on the back of the box, which indicates IMEIthe serial number and model of the device. Many users keep boxes for years, and they become a salvation in a critical situation. Also, the code is often duplicated in the warranty card or purchase receipt if the seller entered this data manually.
If the box is thrown away, check the personal account of your mobile operator. Some providers store information about connected devices in the tariff history or in the “My devices” section. It is also worth looking into your account Google. If synchronization was enabled on your phone, you can find information about the model and sometimes serial data in the security or device history section.
If you bought the phone in a large chain store, request a copy of the receipt or an extract from the sales database through the store's support service - the IMEI of the sold copy is often recorded there.
For clarity, let's look at where exactly to look for data depending on the situations:
- 📦 Box: sticker on the back wall of the package (the fastest way).
- 🧾 Documents: warranty card, sales receipt, sales contract.
- 📱 Settings: section
About phone → General information(only if the phone is available). - 🌐 Account Google: device management page in security settings.
Algorithm of actions in case of theft or loss of a smartphone
You need to act quickly and consistently. The less time passes from the moment of loss to blocking, the higher the chances that attackers will not have time to use your data or money in your account. The first step should always be to try to determine the location of the device through geolocation services.
Use the service Google Find My Device ("Find Device"). Log into your account from any other gadget or computer. If your phone is turned on and has internet access, you will see it on the map. The service allows you not only to track a gadget, but also to remotely lock the screen, display a message with a contact number, or completely erase data. However, this does not replace blocking by IMEI at the operator.
In parallel with the search, you must block SIM card. Call your operator's support service or visit the nearest phone store with your passport. This will prevent your number from being used for calls, receiving confirmation codes from banks and accessing instant messengers. Only after blocking the SIM card should you proceed to the procedure for blocking the hardware itself.
☑️ Emergency action plan
Official blocking procedure through a telecom operator
Blocking by IMEI is carried out solely on the basis of the owner’s application and, as a rule, requires documentary confirmation of the theft or loss. Telecom operators do not block devices simply by calling them in order to avoid abuse by scammers who could block other people's phones out of revenge or competition.
To initiate the process, you need to contact your operator's telecom office with a passport. In most cases, you will need to provide a copy of the statement from the police about the initiation of a criminal case or a coupon notification of acceptance of the statement. This confirms that the device has indeed left your possession illegally or as a result of loss.
The procedure can take from several hours to several days. The operator checks the provided data, checks the IMEI against the database of active devices and prohibits the registration of equipment on the network. After this, the phone stops receiving the network of any operator within the country. It is important to save the application number or a copy of the application for further control.
⚠️ Attention: If the phone was lost and not stolen, the police may refuse to initiate a criminal case, since there is no corpus delicti. In this case, check with the operator whether they accept a statement of loss without a certificate from the Ministry of Internal Affairs. The rules may differ for different providers.
Let's consider the basic requirements of different operators in the summary table:
| Operator | Required documents | Blocking period | Cost of the service |
|---|---|---|---|
| MTS | Passport, Police Report | Up to 3 working days | Free |
| MegaFon | Passport, Coupon Notification | 1-2 working days | Free |
| Beeline | Passport, Copy of application to the Ministry of Internal Affairs | Up to 5 working days | Free |
| Tele2 | Passport, Document from the police | 2-4 business days | Free |
Interaction with the police and legal aspects
Applying to law enforcement agencies is not just a bureaucratic formality, but a necessary stage for official blocking and potential return of property. When submitting an application, it is important to describe as accurately as possible the circumstances of the loss or theft, indicating the time, place and characteristics of the device.
In the application, be sure to indicate the phone model, its color, the presence of characteristic damage (scratches, chips) and, most importantly, IMEI. It is the presence of this number that allows the police to seize found devices and compare them with the database of stolen ones. Without IMEI, it will be extremely difficult to prove that the found phone belongs to you.
Having received a coupon notification of registration of the application, you can safely go to the telecom operator. This document serves as the legal basis for making changes to the equipment register. Remember that a false report of theft for the purpose of blocking the phone (for example, if you simply lost it, but do not want to pay for communication) may entail criminal liability.
What to do if the phone was found after blocking?
If the device is found, the unlocking procedure also goes through the operator. You will need to write a new statement that the phone was found and provide a document from the police about the termination of the case or the return of property. The operator will remove IMEI from the blacklist within a few days.
Myths about unlocking and checking device status
There are many myths on the Internet that a phone blocked by IMEI can be easily “unlocked” by flashing it or using special apps. This is not entirely true. The blocking occurs on the operator's side (in the network database), and not in the phone's memory. Therefore, resetting the settings or installing new firmware will not help to bypass the ban.
The only way to unlock the device legally is for the owner to contact you or for the police to find the device. Illegal methods such as changing the IMEI (flashing the modem) are illegal in many countries and can lead to permanent failure of the smartphone's radio module. In addition, modern phones store IMEI in a protected memory area, which is extremely difficult to change programmatically.
Before purchasing a used device, always check its status. There are online services and databases that allow you to check whether a phone is blacklisted. Enter IMEI into the search bar of such a service and you will receive information about the status of the device. This will save you from buying stolen goods, which will one day turn into a useless piece of plastic.
IMEI blocking is a network ban. It does not depend on the operating system or version of Android, so resetting to factory settings does not remove the lock.
Frequently asked questions (FAQ)
Is it possible to block a phone by IMEI without reporting to the police?
In most cases, telecom operators require a document from the police (notification coupon) as confirmation fact of loss or theft. This is a security measure to prevent malicious intent from blocking other people's devices. However, some operators may consider an application for loss without a certificate, but the procedure will take longer and will require personal appearance with a passport.
Will the phone work abroad if it is blocked in the Russian Federation?
It depends on what databases the operator is in. The phone will not work within the country. It can function abroad if local operators do not synchronize their “black lists” with Russian bases. However, the global GSMA database exists, and many major operators in the world exchange data about stolen devices.
Is data from the phone erased when blocked by IMEI?
No, blocking by IMEI only restricts access to the cellular network (calls, mobile data). The data on the phone (photos, contacts, applications) remains intact. To delete data, you must use the remote reset function through the service Google Find My Device or similar services from the manufacturer (for example, Samsung Find My Mobile), provided that the phone is connected to the Internet.
What happens if I find my phone after blocking?
You will need to contact your telecom operator with a statement about unlocking. Usually you need to provide the same document from the police, which confirms that the device was found and returned to the owner, or write a new statement to stop the search. The process may take several days.
Is it possible to change the IMEI on the phone to bypass the lock?
Technically this is possible on some older Android models with root access, but on modern devices it is extremely difficult and risky. Additionally, changing the IMEI is illegal in many jurisdictions and may render the communication module completely inoperable. Operators have also learned to detect ID substitution.