How to check a Xiaomi device by serial number: from originality to warranty

Xiaomi’s serial number is a unique identifier that hides a lot of useful information about your device, which not only confirms the authenticity of your smartphone or smartwatch, but also reveals the date of production, the country of manufacture, and checks the status of the warranty, especially for those who buy equipment from hand or on marketplaces, where the risk of running into counterfeit or gray imports remains high.

In this article, we will discuss all official and alternative methods of checking by serial number, including hidden functions. MIUI, Xiaomi's online services and even methods for devices that don't turn on.You'll also learn how to distinguish the original serial number from a fake one and what to do if the data doesn't match the information on the box.

Where to find the serial number on Xiaomi devices

Before you check the device, you need to properly extract its serial number. Depending on the type of Xiaomi equipment (smartphone, smartwatch, router or laptop), the methods may differ.

• 📱 On the box: usually listed on a barcode sticker (look for lines) S/N, Serial No. or SN).
• 🔧 In settings: for smartphones the way - Settings → The phone. → General information → Serial number.
• 🔋 Under the battery: on older models (for example, Redmi Note 3) the serial is duplicated on the sticker under the battery.
• ⌚ On smart watches: the Mi Band or Watch number is indicated on the back of the case (you will have to remove the strap).
• 📡 On routers: look for a sticker on the bottom of the device (near the MAC-address).

If the device doesn't turn on, you can retrieve the serial number through Fastboot mode. Connect the smartphone to your PC, open the command line and type in:

fastboot getvar serialno

For devices on Qualcomm (most Xiaomi) also fit the command:

fastboot getvar all

⚠️ Warning: On fake devices, the serial number on the box and settings may not match. This is a sure sign of counterfeit products.

Official ways to check through Xiaomi websites

Xiaomi provides several tools for authenticating by serial number, the main thing is to use only official resources, as third-party services can collect your data or show irrelevant information.

1. Check on the site mi.com (for smartphones and tablets)

The most reliable method is to check through the official verification page.

1. Go to the site and select a region (e.g. Global or Russia).
2. Enter the serial number (without spaces) and the captcha.
3. Press Verify.

The system will show:

• 📅 Date of production (month/year).
• 🏭 Producing country (e.g. China or India).
• 🔄 Activation status (if the device is already linked to your Mi Account).

2. Verification of the warranty via service.mi.com

For devices purchased in official stores, support is available.

• 🛡️ Validity of the warranty (if the device is registered).
• 🔧 History of appeals to service centers.
• 📦 Information about the configuration (for example, the presence of a charger in the box).

If a site is running a “Serial number not found” error, it can mean:

• The device is fake.
• Serial number entered incorrectly (check register and symbols).
• The device is intended for another region (e.g., the Chinese version for the domestic market).

Xiaomi serial number decoding: what the numbers hide

Xiaomi serial numbers are not random — they contain encrypted information about the device, for example, for smartphones, the format is usually this way: XXXXXXXXXA or XXXXXXXXXX, where:

• The first 6-8 characters are a unique party identifier.
• The last 2-3 characters are the factory code and the date of production.

You can use production date calculators to decrypt it, for example, on the XiaomiTools website. Enter the serial number and the service will show:

• 📅 Exact release date (day/month/year).
• 🏭 Manufacturer (e.g. Foxconn or Huaqin).
• 🌍 Destination Region (Global or Chinese version).

Example of decryption of serial number 8QBC5TJ5A:

⚠️ Note: If the serial number starts with 000, 111 or repeating characters (e.g, AAAAAAAA), The original numbers are always unique and do not contain template sequences.

Check through IMEI: alternative way for smartphones

If the serial number is missing or in doubt, you can use the IMEI — International mobile device identifier, which is also linked to the device and allows you to verify its history.

You can find out about IMEI:

• 📞 By typing on the phone keyboard *#06#.
• 📄 In settings: About the phone → General information → IMEI.
• 📦 On a sticker under the battery or on a box.

Use:

1. IMEI.info – will show the model, year of release and specification.
2. SNDDeepInfo – to check the status of the lock (relevant for stolen devices).
3. IMEI-Pro defines the region and operator.

If IMEI It starts with 86, which is the Chinese version of the device. For global models, the first digits are usually 35 or 36.

💡

If, in the course of the inspection, IMEI The service shows a model that does not match your device (for example, instead of Redmi Note 12, the Samsung Galaxy is displayed), this is a clear sign of a fake or overstuffed phone.

Checking smart watches and fitness bracelets Xiaomi

For wearable devices (Mi Band, Xiaomi Watch, Smart Band Pro), the serial number is checked differently. IMEI, The main tool is the official Mi Fitness app (formerly Mi Fit).

Instructions:

1. Connect the device to the application via Bluetooth.
2. Go to Profile. → My devices. → [gadget] → Information.
3. Find the serial number and copy it.
4. Check the number at wearables.mi.com (Verify section).

For the Mi Band. 6/7 Xiaomi Watch S1 It also works through the method QR-Scan it with the Mi Home app, and the system will automatically identify the authenticity of the code.

Beware of fakes with Aliexpress! Often scammers sell bracelets with cloned serial numbers.

• 🔋 Fast discharge (original holds charge for 10–14 days).
• 📉 Unstable synchronization with the application.
• 🔍 Lack of device information in Mi Fitness.

Compare the serial number on the box and in the application

Check it out. QR-code through Mi Home

Make sure that Mi Fitness displays a device model

View reviews about the seller (if you buy from hand)

-->

What to do if the serial number does not pass the check

If Xiaomi's official services don't recognize your serial number, don't panic.

If you are sure that the serial number is original, but the check does not pass, try:

1. Contact Xiaomi with a photo of the box and device.
2. Check the number through alternative services (e.g, IMEI24).
3. Check the data with the sticker under the battery (if possible).

⚠️ Warning: Never enter a serial number on suspicious sites that offer "unblocking" or "money originality check"; fraudsters can use this data to steal a Mi Account or lock a device.

Checking Xiaomi devices without serial number

If the serial number is erased, missing or in doubt, there are alternative ways to verify:

1. Through MAC-Address (for routers and smart devices)

MAC-The address is also unique and linked to the device:

• On the router sticker (Mi Router, AiOT Router).
• In the settings of the smartphone: Wi-Fi → [your network] → Additionally.

Check it out. MAC site MAC Vendors – it must be owned by Xiaomi Communications Co Ltd.

External indications

The original Xiaomi devices have the following features:

• 📦 Box: high-quality printing, hologram with the Mi logo, font without typos.
• 🔌 Charging: The original adapter has a marking MDY-XX-XX (for example, MDY-12-EU European version).
• 🔍 Camera: smartphones Redmi and POCO The camera module has a laser engraving of the model.

3. Through the Mi Account

If your device is already linked to your Mi Account, check it in your account:

1. Sign in to the site.
2. Go to the Devices. → List of devices.
3. Find your device, and there will be a model and serial number.

💡

If the device doesn’t show up in your Mi Account, it could mean it’s not original or has been reset to factory settings without decoupling from the previous owner.

FAQ: Frequent questions about Xiaomi's serial number check