Now almost any more or less valuable thing has some kind of unique identifier. It allows you not only to track its movements, starting from the factory, but also to identify it in case of theft. For electronics, these are serial numbers, for a car, this is the state number and VIN, and for smartphones, this is IMEI. Many people underestimate its importance, although in fact it is essentially the main thing that a smartphone has, and it allows you to do a lot not only to us, but also to us. This is like a TIN or passport number for a person, and therefore it should be treated carefully and even with some trepidation. Although, you shouldn’t overdo it. Let's figure out what this set of numbers is, why it is needed and what it carries.
IMEI is much more important than you think.
What do the numbers in IMEI mean?
IMEI consists of 15 digits , but there are analogues with 17 characters. These security numbers in mobile equipment (in our case, a phone) are used to register the device on the cellular network. That is, technically, even if you change your SIM card, the mobile operator will still be able to identify you. By the way, this is why smartphones with two SIM cards (and two communication modules) have two IMEIs.
Some phones have two IMEIs at once. Those with 2 SIM cards.
Of the fifteen digits, two indicate the smartphone manufacturer’s code, another four encrypt the model, and two indicate the place of production. Of the remaining seven digits, six are the unique serial number of a particular smartphone and one is a reserve one just in case. It may seem that six digits for a serial number is not enough, but do not forget that these are only devices with completely identical characteristics. Devices with different memory or screen sizes have a different model number, even if they are sold under the same name.
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Entering the unlock code using AT commands
In order to enter an AT command, you need to change the following:
- ATI
- Manufacturer: Huawei
- Model: E4520
- Revision: 22.446.06.00.208
- Revision: 22.446.06.00.208
- IMEI: 837501013090647
- +GCAP:
- +CGSM,
- +DS,
- +ES
- OK
Further:
- AT^CARDLOCK?
- ^CARDLOCK: 2,10,0
- OK
Note! Using the ^CARDLOCK command, the unlock response occurs. After this, it becomes possible to use operator SIM cards.
What does IMEI show?
As you understand, if you know the IMEI, you can find out everything about the phone. Of course, not all information is available for public use, but technically it is even possible to contact a specific person who assembled the body of a particular smartphone at the factory.
IMEI is printed on the smartphone box, on a sticker inside it if the battery is removed, and is in the device settings . After looking at it, you can check the device before purchasing, find a stolen smartphone and establish ownership. To do this, it is often enough to present the original box. Of course, it can be faked, but determining its authenticity is a separate procedure.
IMEI is an important element of any means of communication.
Adb Run
You can also restore or create a new identification number for your Android phone using this universal program for your computer.
After downloading and installing Adb Run , the user must:
- Launch the application and, while it is loading, connect your smartphone to your computer or laptop using a USB cable.
- In the open menu, which cannot but please the lover of brevity, enter number 7 (Manual Command) in the command line and press the Enter key.
- Now - go to section 12 in the same way (IMEI Restore - as follows from the warning, the option is only suitable for smartphones based on MTK).
- If desired, read the instructions for changing the universal number and the developer’s disclaimer of warranties by sending the command “0”.
- Or get straight to the point. If your Android phone supports using only one SIM card, enter the command “1”; if there are two - “2”.
- On the next page, the device owner must sequentially enter and apply the IMEI for the first one.
- And a second slot.
- The program will generate a file without the MP0B_001 extension. To find it, the user needs to open the Adb Run folder by double-clicking on the shortcut on the desktop and go to the progbin directory. Another option to find yourself in the right place is to enter the address C:\adb\progbin in the Explorer search bar.
- The specified file must be copied to the internal memory of the phone.
- Now, using any file manager with the ability to access the root folder, the owner should find MP0B_001 on the smartphone.
- Copy it.
- Go to parent folder.
- Open the data directory.
- And sequentially the nvram subdirectories.
- md.
- NVRAM.
- NVD_IMEI.
- And paste the file into the last folder, confirming the replacement of the existing one as necessary. If one of the above subfolders is not on the device, you should create the missing chain yourself - or reflash the phone again.
By rebooting the Android smartphone, the owner will receive working SIM card slots with valid identifiers; If restoring IMEI did not work out this way, you should check the accuracy of the entered sequences and try again.
Is it possible to show IMEI to someone
Technically, using the IMEI number, you can even turn your smartphone “into a pumpkin” by contacting the police to report the theft. In this case, the operator can block IMEI in its database. By the way, this is why it is better not to show this number anywhere.
A phone that has been blocked by IMEI by one mobile operator will be able to work on the network of another. This allows thieves to resell smartphones to other countries. There is no single blocking around the world, and therefore the victim will never be able to prevent him from using a smartphone stolen from him, say, in Greece. It’s another matter if the person whose smartphone was stolen entered the IMEI into a special database - Global black list . Then the device will not function in the networks of many cellular operators that use this database.
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How to find out the IMEI of a phone
The easiest thing is to look at it on the box. One or two codes, if the smartphone is dual-SIM, are written on a special sticker. There is an IMEI in the documentation that is in the box. You can also remove the battery cover, if it is removable, remove the battery and look there. In addition, you can check the IMEI in the settings, in the phone information . But all this can be faked.
The IMEI can be found under the battery if it is removed.
The most effective way is to enter the phone number *#06# .
There is no need to press “Dial”. As soon as you enter the code, all the necessary information will appear on the screen.
DC Unlocker does not detect the modem, does not see the COM port
To solve the above problem, you must first:
- make sure that the software is closed, since it is used in the COM port;
- stop all processes;
- launch DC Unlocker;
- click on the definition;
- in case of invisibility, you need to download the official firmware;
- run the flasher;
- do not enter Flash code;
- close the flasher;
- launch DC Unlocker.
Note! The COM port should become visible and defined.
Is it possible to change the IMEI of a phone?
Technically , this can be done , and representatives of British telecom operators first spoke about this back in 2002. Naturally, we are talking about replacing IMEI at the system level, and not about installing a “screen”. But this is not so easy to do and you will need not only special skills, but also equipment.
And the most important thing is that by performing such a procedure, there is a significant risk of “bricking” the phone. This is not to mention the fact that in the vast majority of cases such a procedure is simply illegal .
Going back a couple of paragraphs, I will say that changing the visibility of IMEI is much easier. To do this, a special program is launched that shows information about the phone in the settings a little differently than it actually is, but this visibility is eliminated by rebooting the device.
The data printed on the case and box can be faked, but with what is inside the smartphone it is much more difficult.
The only case when IMEI can and should be changed is when it is returned after theft. If you have blocked a number from an operator, you need to contact an authorized service center with documents and a box confirming your ownership of the device and a description of the reason for changing the number. In this case, you will be given a new number that will not be on the blacklist. Although, it’s not a fact that you won’t be refused.
Is there a single IMEI database?
There are several organizations that control the circulation of IMEI numbers. First of all, these are the GSM Association and BABT (British Approvals Board for Telecommunications).
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There is essentially no single database for everyone with the ability to obtain complete information, but in some countries, including Russia, they are working on creating something similar. In the meantime, global practice makes it possible to identify the position of any smartphone by its IMEI number with an accuracy of several hundred or even tens of meters. But this is true for supporters of the “big brother” theories.
Entering AT commands into the modem using PuTTy
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The AT command is necessary to control a number of modem functions. It is entered through certain programs or utilities built into Windows.
PuTTY is the most common and popular client for remote access protocols, in particular:
- SSH,
- Telnet,
- rlogin.
With its help, you can enter AT commands into the modem node:
- ATI/
- Manufacturer:huawei/
- Model^E3272
- Revision: 21.436.05.00.209
- IMEI: 867503013090647
- *GCAP: +CGSH, +DS, +ES
- OK
- AT^CARDLOCK?
- ^CARDLOCK: 2,10,0
- OK
