Where to see the build number on Xiaomi: 8 proven ways

The build number on Xiaomi smartphones is a unique firmware version identifier that can be used to roll back a system, install custom recovery or troubleshooting. Without it, you can't find the right firmware to manually update or unlock the bootloader. But not everyone knows where to look for that number.

In this article, we’ll break down all the possible ways, including hidden menus and command line, and explain how the build number differs from the MIUI or Android version. You’ll learn how to find it on the Redmi Note 12, POCO X5, Xiaomi 13T and other models – even if the phone isn’t turned on or locked.

What is the assembly number and why is it needed

The build number is the internal firmware version code assigned to each MIUI or Android build, and it looks like a combination of numbers and letters, such as V14.0.4.0.TMCRUXM or SKQ1.210216.001.

From MIUI (e.g. MIUI 14) or Android (e.g. Android 13), the build number differs in that:

• 🔹 It points to a specific firmware edition, not a family of versions, which is important for accurate firmware file selection.
• 🔹 It may contain a regional code (for example, RUXM — Russia, EUXM — Europe).
• 🔹 Used to check compatibility with custom recovery (TWRP) or mode.
• 🔹 You need to unlock the bootloader through the Mi Unlock Tool.

Without the build number, you run the risk of downloading the wrong firmware that will lead to a device blink (completely inoperable). For example, the firmware for the Redmi Note 11 Pro+ 5G with the number V14.0.3.0.TKCMIXM will not work for the V14.0.2.0.TKCEUXM version, even if both are on MIUI 14.

⚠️ Note: The build number does not match the IMEI The latter can be found on the box or under the battery (old models), and the build number is only in the software.

Method 1: Using the phone's standard settings

The easiest method is to look up the build number in the About Phone menu, which works on all Xiaomi, Redmi and POCO models, including the latest versions of MIUI 14/15:

1. Open the settings (cog icon).
2. Go to the About Phone section (sometimes called About the Device).
3. Slip on the item MIUI version or Software Information.
4. The build number will be listed in the Build number or Build number.

On some firmware, the path may be slightly different. For example, on POCO F5, you need to go to Settings → About Phone → All Specifications → MIUI version.

Open "Settings"|Find the "About the Phone" section"|Stick to the "Version" MIUI"|Write down the assembly number.-->

If you have a global firmware, the build number will end with MIXM (world-wide EUXM (Europe, on the Chinese versions — CN.

Method 2: Developer menu (for experienced users)

If the standard path didn't work (for example, because of custom firmware), you can find the build number on the developer menu.

1. Activate Developer Mode: Go to Settings → About Phone and tap the MIUI version 7 times.
2. Go back to the main settings menu and open a new section for developers.
3. Scroll down to the device information block - there will be the build number string.

In this menu you can also see other useful data:

• 📱 Model of device (e.g, 22101320C For the Redmi Note 12 Pro+).
• 🔧 Version of the kernel (useful for debugging).
• 🛠️ Band Version (to check network support) 5G).

⚠️ Note: Some firmware (e.g. Xiaomi.eu) may not display the build number in the developer menu in its entirety. ADB (4).

Method 3: via the Security app (for older models)

On devices with MIUI 10-12 (such as the Redmi Note 8 Pro or Mi 9T), the build number is sometimes hidden in the Security app:

1. Open the Security app (shield icon).
2. Go to the Optimization or Acceleration tab.
3. Slip the gear icon in the upper right corner.
4. Select Device Information – there will be a line of Assembly Number.

This method is relevant for firmware based on Android 9-11, and on newer versions (MIUI 13+), it may not work.

Method 4: via ADB (for PC)

If the phone is not turned on or the touchscreen is not working, USB-The debugging was included earlier, you can find out the build number through ADB (Android Debug Bridge:

1. Connect your phone to your PC through USB-cable (original!).
2. Open the command line (Windows) or the terminal (Linux/macOS).
3. Enter the command: adb shell getprop ro.build.version.incremental or for the full build number: adb shell getprop ro.build.display.id

If the team doesn’t work, try:

adb shell cat /system/build.prop | grep ro.build

The result will look like this:

ro.build.version.incremental=V14.0.4.0.TMCRUXM


ro.build.display.id=SKQ1.210216.001.V14.0.4.0.TMCRUXM

⚠️ Attention: If USB-The debugging was not enabled in advance, this method will not work. In this case, use Fastboot (mode 5).

Through phone settings|Through the developer menu|Through ADB (PC)|Through Fastboot (boot mode)-->

Method 5: via Fastboot (if the phone is not turned on)

If the Xiaomi smartphone does not load, but reacts to the power button, you can find out the build number in Fastboot mode:

1. Turn off the phone (press Power + Volume up for 10 seconds).
2. Press Power + Volume Down to enter Fastboot.
3. Connect the device to the PC and open the terminal.
4. Enter the command: fastboot getvar all

In the conclusion, find the lines:

(bootloader) version-bootloader: 0x1000


(bootloader) version-baseband: MOLY.LR12A.R3.MP.V190.1




(bootloader) build-number: V14.0.4.0.TMCRUXM

If getvar all is not supported (on some older models), try:

fastboot getvar product 2>&1 | grep product

💡

If your PC doesn’t see the device in Fastboot, install the Mi Flash Tool drivers and try again.

Method 6: Recovery menu (TWRP/Stock Recovery)

If the phone has custom recovery (TWRP), the build number can be found there:

1. Enter recovery: Press Power + Volume up when the phone is off.
2. In TWRP, go to Advanced → File Manager.
3. Open the file /system/build.prop.
4. Find the lines: ro.build.version.incremental=V14.0.4.0.TMCRUXM ro.build.display.id=...

In stock recovery (native to Xiaomi), build information can be displayed on the home screen at the top or in the Info section.

⚠️ Warning: Changing a build.prop file without knowledge can lead to a cyclical reboot of the phone!

Method 7: through a box or sticker under the battery (for older models)

On some Xiaomi devices (e.g. Redmi 4X, Mi A1), the build number was displayed on a sticker under the battery or on the box.

• 📦 Devices purchased before 2019 (later Xiaomi stopped printing the build number on the package).
• 🔋 Removable battery models (e.g. Redmi) 3S, Redmi Note 4X).

On new smartphones (for example, Xiaomi 13 or POCO F5) such information on the box is not — only the serial number and IMEI.

💡

The build number on the box or under the battery is only relevant to the firmware installed in the factory.

Method 8: Through Third Party Applications (for Lazy)

If you don’t want to dig into the settings, you can use the apps from Google Play:

• 📱 CPU-Z — Shows the build number in the System section → Build.
• 🔍 DevCheck – displays full firmware information, including Build number.
• 🛠️ MIUI Version Info – a specialized application for Xiaomi devices.

Example of display in CPU-Z:

The advantage of this method is that you don't have to search manually, but some applications (such as MIUI Version Info) may not support the latest models.

Frequent Mistakes and How to Avoid Them

When searching for a build number, users often confuse it with other identifiers, and here are the most common mistakes:

• 🆔 Confused with IMEI — Unique number of the communication module (located in Settings) → The phone. → General information).
• 🔢 Tangled with a serial number (S/N), which is indicated on the box and in the settings → The phone. → Status.
• 📱 Confused with the device model (for example, 2201116PG For the Redmi Note 11).

Many people mistakenly believe that the assembly number can be found:

• ❌ B Settings → Memory – there is only information about the storage.
• ❌ B Settings → Xiaomi accounts – there is profile data, not firmware.
• ❌ Through voice assistant, it does not provide technical information.

💡

The build number always contains letters and numbers in X.X.X.X.XXXXXX format (e.g. V14.0.4.0.TMCRUXM).If you only see numbers (e.g. 14.0.4), it is the MIUI version, not the build number.

FAQ: Answers to Frequent Questions