How to see the serial number of Xiaomi phone: full methods

Owning a Xiaomi smartphone requires periodic reference to its technical specifications and identification data. Serial number is a unique identifier that is assigned to a particular device at the manufacturer's factory. Knowledge of this code is critical when registering a warranty, contacting a service center, verifying the authenticity of the device or unlocking the bootloader through the official Mi Unlock service.

Many users are confused SN (serial number IMEI, But these are completely different parameters. IMEI identify SIM-The serial number is tied to the hardware and the body of the smartphone. In this article, we will discuss in detail all the available ways to obtain this information, including hidden engineering menus and system files.

There are several levels of access to device data, from simply inspecting the package to using ADB commands. Xiaomi serial number always consists of a combination of Latin letters and numbers, which range from 10 to 20 characters depending on the year of the model. Incorrect reading of even one character can lead to a denial of warranty service, so it is important to use proven methods.

Search for information on the packaging and body of the device

The easiest and most reliable way to avoid the gadget is to inspect the factory box, and the back of the cardboard package always has a white barcode label on it, and it duplicates the basic data: model, IMEI, and Serial Number, which is usually marked by the acronym SN or S/N. This method is ideal if the phone is discharged or not turned on.

If the box is lost, you can try to find information on the body itself. In modern Xiaomi Redmi and POCO models, this data is often laser-engraved on the back cover or pasted on the factory screen film. However, in flagship series such as the Xiaomi 13 or 14, manufacturers are increasingly abandoning data from the outside to preserve the aesthetic of the design.

• 📦 Check the side edges of the box - sometimes the sticker is located there.
• 🔍 Use a magnifier or macro shot of your phone to read fine engravings.
• 📸 Take a photo of the label immediately after buying for the archive.

⚠️ Warning: Case stickers can wear off over time from wearing a case. Don't rely on this method alone for long-term data storage.

It's important to understand that the data on the box is only relevant if you haven't changed the motherboard of the device. In complex repairs in unqualified services, the logic board could be replaced, and then the serial numbers on the case and in the system will be different.

Use the standard menu settings MIUI and HyperOS

The most common method for working smartphones is to navigate through the operating system interface. The MIUI shell and the new HyperOS have a similar menu structure. You have to open the Settings app and scroll to the bottom of the list. Here is the About Phone section, which contains all the basic information.

Inside the About Phone section, you can see the device name, Android version, and other technical statistics. To see the full list of identifiers, including the serial number, you often need to click several times in a row on the string with the MIUI Version, or just look at the list below. In new firmware versions, data can be hidden under the All Features button.

The path to data may vary slightly depending on the regional version of the firmware. Global ROMs are more standardized, while Chinese firmware (CN ROM) may have some items called differently or placed in other menu subsections.

Application of engineering codes and USSD-team

To gain access to hidden technical information, Xiaomi developers have implemented special engineering codes, which enter these combinations in the Phone app, gives access to the CIT (Customer Information Test) menu, or engineering menu, a professional tool that displays raw data about hardware.

The most universal code to enter the test menu is ##6484## or #4636##. Once you enter the last set of characters (grid or star), the menu should open automatically, without having to press the call button.

##6484##
##4636##


*#06#

It is worth noting that in some operators or in certain regions the USSD-Also in the latest Android security updates, access to some engineering menus through dialing has been restricted for security reasons.

• 📞 Enter the code carefully, without pauses and unnecessary symbols.
• 🚫 Do not change the settings in the engineering menu unless you are sure of their value.
• 🔄 If the code doesn’t work, try the alternative from the list above.

⚠️ Note: Accidental change of parameters in the engineering menu (especially in the Band Selection or Network section) can lead to loss of communication or unstable operation of the Wi-Fi module.

Verification through ADB and computer utilities

For advanced users involved in flashing or deep diagnostics, the most reliable source of information is the protocol. ADB (Android Debug Bridge. This method allows you to get data directly from the system, bypassing the GUI, USB-cable and installed drivers ADB.

Once you have your smartphone plugged in and you have USB debugging enabled (in the Developer menu), you have to type a command into the console, which ensures you get the exact serial number that the system sees, and this is especially useful if the phone screen is broken but the touchscreen is partially working, or if the interface is frozen.

adb shell getprop ro.serialno

The command will return the serial number string. If you see a blank line or error instead of a number, there may be no drivers installed or debugging activated. There are also third-party management programs, such as the Mi Flash Tool or Mi PC Suite, which automatically read its unique ID and SN when you connect the device to perform firmware operations.

Comparative table of methods for obtaining SN

The choice of method depends on the state of your device and the purposes for which you need a serial number. Below is a table that helps you quickly navigate the available options and their reliability.

As you can see from the table, the settings menu is enough to check quickly, but for legal procedures or for theft, it is better to use a combination of methods: compare the number on the box and in the system.

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Keep a photo of the check and the serial number box in cloud storage, and in the event of theft or loss of the phone, it will speed up the locking process and proof of ownership.

Solution: if the serial number is not displayed

Sometimes users are faced with a situation where the serial number field displays zeros, dashing or the message "Unknown", which may indicate a software failure, a failed flashing or damage to the NVRAM partition where calibration data and identifiers are stored.

In case of a software error, it is often helpful to reset your settings to factory (Hard Reset).Be sure to back up your data before this procedure. If the reset did not help, it may have been installed custom firmware with incorrectly assembled recovery or system image that does not contain the correct paths to the identification files.

• 🔄 Complete a full reset via the Recovery menu.
• 💻 Refuse the device with the stock version via the Mi Flash Tool.
• 🛠 Contact the service if the problem is hardware (related to memory).

⚠️ Note: If the serial number is missing after self-flashing, re-write the correct data requires qualified intervention and backup. NVRAM from your device.

In rare cases, the absence of an SN can be a sign that the device is a refurbished homemade method, where key components have been replaced without the appropriate software binding.

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The absence of a serial number in the system when it is on the box is a critical signal about software interference or replacement of the motherboard.

Why You Need a Serial Number and How to Use It

Understanding the value of a serial number goes beyond mere curiosity, and it is the code that is key to Xiaomi’s ecosystem, and without it, you can’t register a device on the official website for an extended warranty or participation in the MIUI (Beta testing) test program.

In addition, when selling a phone, having a box with a matching SN increases the liquidity of the device and the buyer's confidence.This confirms that the phone was not assembled from different parts ("Frankenstein") and has original origin. For owners of several smart home devices, SN is also used to initially link gadgets to a Mi Home account.

In conclusion, storing and knowing your serial number is a sign of a competent user, a simple but effective way to protect your consumer rights and ensure that all services related to your Xiaomi smartphone work correctly.