Owning a modern smartphone implies not only the ability to use applications, but also a basic understanding of how to identify your hardware in the system. Each device operating under Androidhas a unique digital passport, which is required when flashing, purchasing accessories or registering with service centers. Users often confuse IMEI, serial number and model code, although these are fundamentally different identifiers that perform different functions.

Knowing the exact device code allows you to avoid mistakes when searching for drivers or ordering spare parts, such as a screen or battery. In this article we will analyze all the available methods for obtaining this information: from simply looking at the settings to using the engineering menu and computer utilities. Let's take a look at how model code differs from IMEI and why it is important for every owner to know.

Sometimes the information on the box or in the warranty card is lost, and the phone itself may be locked or have a broken screen. That's why it's important to know several ways to retrieve device data so you can be prepared for any situation. We will consider both standard software methods and more advanced options for experienced users.

Searching for information in system settings

The most obvious and safest way to find out the device code is to look in the operating system settings menu. The path to this information may differ slightly depending on the version Android and shell of the manufacturer (for example, One UI from Samsung or MIUI from Xiaomi), but the logic remains the same. You need to open the “Settings” application and scroll to the very bottom.

Here you will find the “About phone”, “About device” or “System” section. It is inside this menu that all technical information is hidden. By clicking on the corresponding item, you will see a list of characteristics, which usually includes: model, build number, Android version and often the serial number. On some devices, you need to tap the “Build Number” or “MIUI Version” line several times to activate hidden items.

⚠️ Attention: The “About Phone” menu interface may change after major system updates. If you do not find the item you need right away, use the search in the settings by entering the word “model” or “status.”

It is important to distinguish between “Model” (for example, SM-G991B) and “Device Name”, which the user often changes himself for Bluetooth or Wi-Fi. The model code is a hard-coded identifier from the manufacturer that cannot be changed programmatically without deep intervention in the system. It is this code that is needed to search for compatible firmware.

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Take a screenshot of the “About phone” screen immediately after purchase and save it in the cloud. This will help identify the device if the stickers on the case are erased.

Using USSD commands and engineering menu

If the phone screen does not work or you cannot get to the menu, special codes dialed in the dialer come to the rescue. These commands work at the modem level and are available even without loading the operating system in full. The most popular request is *#06#, which instantly displays IMEI and IMEISV.

However, to find out exactly the model code and other technical information, other combinations may be required. These often depend on the processor (SoC) installed in your smartphone. For example, processor-based devices MediaTek and Qualcomm have different sets of engineering menus. Be careful when entering codes, do not change the values in the engineer's menu if you are not sure of their purpose.

List of the most common codes for diagnostics:

  • 📱 *#06# — displays IMEI, IMEISV and serial number (works on 99% of devices).
  • ⚙️ ##4636## —Testing menu, where you can find detailed information about the battery and usage statistics.
  • 📡 ##7780## — reset settings to factory settings (use with extreme caution, requires confirmation).
  • 🔍 *#1234# — often used in Samsung devices to view the firmware version and CSC (regional code).

Some manufacturers block access to engineering menus through a standard dialer. In such cases, the code simply will not work or nothing will appear on the screen. This is normal and is a safety measure so that inexperienced users do not accidentally reset the calibration of the sensor or antenna.

📊 Which method of checking the device code is more convenient for you?
Through Settings
USSD command in the dialer
Using computer
On the phone box

Physical markings and documentation

When the phone is turned off or completely discharged, the only source of information remains its physical body. Manufacturers are required to apply identification codes to the device body. In modern smartphones where the battery is not removable, this information is most often located on the back cover or on the SIM card tray.

If there are no obvious inscriptions on the case (which is often the case in premium models for aesthetics), check the SIM card tray. On many models iPhone and some Androidflagships, IMEI or part of the model code is embossed in a microscopic font at the end of the tray. To read, you may need a magnifying glass or macro photography on the camera of another phone.

Also, do not ignore the original packaging. At the bottom of the box there is always a sticker with barcodes, which indicate:

  • 📦 The exact model of the device (Model).
  • 🔢 IMEI (often two if the device is dual-SIM).
  • 🆔 Serial number (S/N or SN).
  • 🌍 Regional code (CSC), indicating the market.

Keeping the box makes sense not only for resale, but also for warranty service. Service centers often require you to present the device along with the box in order to check the IMEI on the case, in the system and on the packaging. Non-compliance may cause a denial of the warranty.

Why may the codes on the box and on the phone differ?

In rare cases, when the motherboard is replaced by an authorized service, the IMEI in the system may be updated, but the sticker on the box will remain the same. This also happens with restored devices (Refurbished), where the case was changed.

Comparison of identifiers: IMEI, SN and Model

Users often confuse various digital identifiers, considering them synonymous. However, for the system and service engineers this is completely different data. Understanding the difference will help you correctly formulate support requests or search for the necessary files.

IMEI (International Mobile Equipment Identity) is a unique number for your specific device in the cellular network. It is “hardwired” into the modem. If you lose your phone, it will be blocked by IMEI. Serial number (SN) is the manufacturer's internal number used to track the device at the factory and during warranty service. Code models is a device type designation that is the same for all phones of the same modification.

For clarity, let's compare these parameters in the table:

Parameter Uniqueness Where it is used Can it be changed
IMEI Unique for everyone device Cellular networks, police, blocking Only illegal (difficult)
Serial number (SN) Unique for each device Warranty, warehouse manufacturer No
Model code (Model) Same for the entire series Search for firmware, drivers, accessories No (without re-soldering the chip)
MAC address Unique for the Wi-Fi/Bluetooth module Local network, routers Yes (software)

Remember: if you are looking for a case or glass, you need one Model code. If you write to support regarding the warranty - Serial number. If the phone is stolen - IMEI.

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IMEI identifies the device on the network, Model - the type of device, Serial number - a specific copy at the factory. Do not confuse them when contacting the service.

Receiving data via ADB and computer

For advanced users, developers, or in situations where the touch screen does not respond to touches, the ideal solution is to use USB debugging. Protocol ADB (Android Debug Bridge) allows you to access system files and display complete information about the device through the computer command line.

For this method you will need a PC, a USB cable and ADB drivers installed. On your phone, you need to activate developer mode (by clicking on the build number 7 times) and enable the “USB Debugging” option. After connecting to the computer and confirming the connection on the phone screen, you can enter commands.

The basic command to get all the information looks like this:

adb shell getprop | grep "model\|device\|serial"

This command will display a list of properties, including ro.product.model (model), ro.serialno (serial number) and other technical details. This is the most reliable method, since it reads data directly from system properties, ignoring possible graphical interface bugs.

⚠️ Attention: ADB requires the installation of specialized software (Platform Tools) to work. Make sure that you only download tools from official sources to avoid infecting your PC with viruses.

Using ADB also allows you to verify the authenticity of the device. If the command returns standard values like generic_x86 or unknown on a branded phone, this may indicate a fake or seriously damaged system partition.

Various Android smartphone manufacturers use their own systems encodings Knowing these nuances helps you quickly navigate the characteristics. For example, Samsung's model code contains information about the region, while Xiaomi's contains information about the global version.

Let's consider the marking features of market leaders:

  • 🇰🇷 Samsung: Codes like SM-G998B/DS. The letter at the end (B) indicates the region DS means Dual SIM. Full information is often hidden in the menu *#1234#.
  • 🇨🇳 Xiaomi / Redmi / POCO: Models have codes like M2101K7BG. The first digits often indicate the year and month when development began. The information menu is called up by code ##6484## (CIT Menu).
  • 🇺🇸 Motorola: Codes starting with XT or Motoare often used. The engineering tests menu is called by the code ##4636##.
  • 🇨🇳 Huawei / Honor: Use complex alphanumeric notations (for example, ALG-AN00). To enter the engineering menu, a special “Project Menu” application is often required.

Understanding these differences helps when searching for firmware. The firmware for the European version (region code EUR or XEF) may not fit on the Chinese version (CHN) without changing the region, which requires additional manipulations.

☑️ Checking before buying a used phone

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What to do if the IMEI in the settings and on the case do not match?

IMEI mismatch in the software and on the case sticker (or in the *#06# menu) is an alarming signal. This may mean that the phone was assembled from different parts ("Frankenstein"), the motherboard was replaced by an unauthorized service, or the device is a counterfeit. In rare cases, this is a software glitch that can be solved by resetting to factory settings, but most often it is a sign of a problematic device, which is better to refrain from purchasing.

Is it possible to change the phone model code?

It is impossible for an ordinary user to change the hardware model code (the one that is recorded in the memory chip). However, the software display of the model can be faked using root access and special applications (BuildProp Editor), but this is a cosmetic_change. The actual identification when connecting to a computer or update server will remain the same. Attempts to reflash the model may lead to the device being “bricked.”

Why do you need a regional code (CSC) in Samsung?

CSC (Country Specific Code) determines the set of pre-installed applications, supported LTE frequencies and the presence of specific functions (for example, call recording or FM radio). Changing the CSC can unlock hidden functions, but can also lead to loss of warranty or inoperability of some services (Samsung Pay, Health) in your region.