How to find out the date of production of Xiaomi device: a step-by-step guide

Did you buy a used Xiaomi smartphone or want to verify the authenticity of a new device? Production date is a key parameter that affects warranty life, firmware relevance and even market value of equipment. Unlike Apple or Samsung, where the date is encoded in the serial number according to a standardized scheme, Xiaomi’s encryption algorithms have changed several times. In this article, we will discuss all the current ways to determine the release date for smartphones, smartwatches, routers and other brand equipment – from analyzing the box to decrypting IMEI through the engineering menu.

It's important to understand that the date of production and the date of activation of the device are different things: the first shows when the device came off the assembly line, the second shows when it was first turned on, for example, a smartphone could lie in a warehouse six months before sale, and we will focus on the date of manufacture, since it determines the start of the warranty period and helps to detect counterfeits (counterfeit devices often have a mismatch of dates on the box and in the system).

1. Checking the date by serial number (S/N)

The serial number (S/N) is the main identifier of the device, which contains encrypted information about the date of production. Xiaomi has had a different format since 2014, so the decryption algorithm depends on the model and year of release.

• 📅 The first 4 characters are the factory code and date (e.g. 2208) = August 2022).
• 🔢 The following: 6-8 symbols - a unique identifier of the party.
• 📦 The latest 2-4 Symbols: Control sum or region of sale.

To find the serial number:

1. Go to Settings → About the phone → General information.
2. Scroll down to Serial Number (or Serial Number).
3. Write or copy the combination (e.g. 23051FHG9A87).

For devices released before 2018, the serial number can begin with letters.

• 🔤 The first letter is the factory code (e.g. C) = China, B = India).
• 📆 The second and third letters are a month (e.g., A).=January, B=February, L=December).
• 🔢 The fourth character is the last digit of the year (for example, the last digit of the year, 7 = 2017 year).

⚠️ Attention: Serial number of devices POCO Redmi and Redmi after 2020 can use the reverse date order (month-year instead of year-month!

2. Determination of the date by IMEI

IMEI (International Mobile Equipment Identity) is a unique 15-digit code that is assigned to each mobile device. Unlike the serial number, IMEI does not contain direct information about the date of production, but allows you to obtain it indirectly through the databases of the manufacturer or carriers.

How to find out IMEI on Xiaomi:

• 📱 Enter the code *#06# in the phone application and a window will appear with IMEI.
• 📦 Look at the sticker under the battery (for removable battery devices).
• 🖥️ In settings: About the phone → General information → IMEI.

There are two ways to use the IMEI to determine the date:

1. Through Xiaomi's official website: Go to the checkout page. Enter IMEI, serial number and captcha. The results will indicate the activation date (not to be confused with the production date!).
2. Through third-party services (e.g. IMEI.info): Enter IMEI on the site. Pay for the report (the free version only shows basic information).

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If the activation date on the Xiaomi website is significantly later than the production date (for example, the difference is more than 6 months), this may indicate a long-term storage of the device in stock or resale.

3.Date on the box and device stickers

The easiest, but often ignored, way to do this is to inspect the original packaging, and Xiaomi boxes have two production dates:

• 📦 Barcode sticker (usually on the end of the box) – contains the date in format YYYY-MM-DD or MM/YYYY.
• 🏭 White sticker with serial number (under film) - may contain the batch code, where the date is encrypted.

Examples of location:

• 📱 Smartphones: a sticker on the end of the box next to the barcode.
• ⌚ Smartwatch: Date at the bottom of the box under transparent film.
• 📡 Routers: sticker on the back of the package.

A critical nuance: if the date on the box and the date on the serial number do not match more than 1 month, this is a sign of a fake or repackaging of the device. For example, a smartphone with a serial number indicating 03/2023, but with a box from 08/2022, most likely was repackaged by the seller.

⚠️ Attention: On devices POCO X3 Pro and Redmi Note 10 2021 The date on the box can be specified in the format WWYY (week-year, for example, 2521 = 25-I'm a week. 2021 Don't confuse it with the usual. MMYY!

Yes, always | Only if there is a doubt | No, I don't see the point | I don't know how to do it-->

4. Engineering menu and hidden codes

For advanced users, there is a way to find out the production date through the Engineering Mode, which works on most Xiaomi, Redmi and POCO smartphones, but requires caution – wrong actions can lead to a system failure.

Instructions:

1. Open the Phone app.
2. Enter the code ##4636## (for new models, you may not be able to use the alternative code ##284###).
3. Go to the phone information or Hardware Info section.
4. Scroll down to Manufacture Date or RF Calibration Date (the calibration date of the RF module often coincides with the production date).

Alternative way for devices on Qualcomm Snapdragon:

adb shell getprop ro.boot.ddr_info

In conclusion, look for a line manufacture_date (for example, manufacture_date=20230515 = 15 may 2023 year-end).

Backup data | Charge your phone at least 50% | Write down IMEI and serial number on paper |Do not press unknown buttons in the menu-->

⚠️ Note: On devices with MediaTek processors (e.g. Redmi) 9A or POCO C31) The engineering menu may not display the date of production, in which case use methods with a serial number or box.

Verification via Mi Account (for activated devices)

If the device has already been activated through a Mi Account, the date of first activation (which is often close to the date of manufacture) can be found through the web version of the account, which is suitable for checking used phones before buying, if the seller agrees to provide access to the associated account.

Step-by-step:

1. Go to the Mi Account website and log in.
2. Select the Devices section.
3. Find the device in the list and click on it.
4. In the Device Information section, the first activation date (First Activation Date) will be indicated.

Please note:

• 📅 The activation date may be later than the production date 1-6 months (logistics and storage time).
• 🔄 If the device was reset to factory settings, the activation date will be reset.
• 🚫 If the list of devices is empty, the seller could untie the account before the sale (suspicious sign!).

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The activation date in Mi Account does not replace the production date, but it helps to detect fraud: if the seller claims that the phone is new and the activation date is a year ago, this is cause for doubt.

6. Specialized applications for Android

If manual methods seem complicated, you can use Google Play apps that automatically read the production date.

• 📱 Phone INFO ★SAM★ — Shows the production date in the Hardware Info section (powers 90% of Xiaomi devices).
• 🔍 CPU-Z — The Device tab may contain the Manufacture Date field.
• 📅 Xiaomi Tools – a specialized application for devices Xiaomi/Redmi/POCO Production Info section.

How to use (on the example of Phone INFO ★SAM★):

1. Install the app from Google Play.
2. Open it and grant permission to access device information.
3. Go to the Hardware Information section.
4. Scroll to the Manufacture Date or Build Date block.

⚠️ Attention: Some applications (e.g, AIDA64) They can show the build date of the firmware, not the device's production!

Determination of the date by model and lot

If the serial number is erased and the box is not, you can try to determine the production date by model code and batch number, which requires access to Xiaomi's database, but there are workarounds.

Steps:

1. Find the model code on the sticker under the battery or in the settings (Settings → About Phone → Model). For example, the M2007J22C for the Redmi Note 9 Pro.
2. The first two digits after the letter M often indicate the year of issue (e.g. 20 = 2020).
3. Compare the model with the GSM Arena database - the specifications sometimes indicate the date of the announcement (usually production begins 1-2 months after the announcement).

For smart devices (watches, bracelets, routers), use the match table:

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For Xiaomi devices released in China, the date on the box can be specified by the Chinese calendar (for example, = May 2021).

Frequent Mistakes and How to Avoid Them

When checking the production date, users often encounter typical problems, and here's how to avoid them:

• 🔄 Confuse activation and production date: The activation date (from Mi Account or *#06#) shows when the device was first turned on, not when it was made!
• 📦 Only the box is trusted: The box is easy to forge. Always check the data against the serial number and the engineering menu.
• 🔢 Serial number misdeciphers: The algorithm for Xiaomi Mi 9 (2019) and Redmi Note 12 (2023) is different. Use current schemas (see section 1).
• 🛠️ Use unofficial services: Sites like imei.info may show an inaccurate date. For critical checks (e.g., before buying), use official sources.

If none of the methods worked:

1. Contact Xiaomi official support with photos of the serial number and IMEI.
2. Check the device through SNeep (for Chinese models).
3. For warranty devices, request verification from the seller through its Xiaomi partner portal.

FAQ: Answers to Frequent Questions