How to find out the year of manufacture of the Xiaomi phone: the complete guide

When buying a used gadget or checking the originality of a new device, it is often necessary to find out the exact age of the device. The date of production of the smartphone is a critical parameter that can tell you about the state of the battery and the relevance of internal components. Unfortunately, in the standard Android settings menu, this information is often hidden from the eyes of the average user, which creates certain difficulties in diagnosing.

Unlike some competitors, the Chinese manufacturer does not display the build date prominently in the interface of the MIUI shell or HyperOS. However, engineering codes and special services allow you to access factory data. Understanding when your phone came off the assembly line will help you avoid buying an “illiquid” or a restored instance, passed off as a new one.

There are several proven methods to solve this mystery, and we'll look at both software methods through the system menu and commands, and external analysis methods for box labeling and IMEI. Each of them has its own nuances that should be considered to get the most accurate result.

⚠️ Note: The production date data in the engineering menu may differ by several months from the actual sale date, as logistics and storage time in warehouses are taken into account.

Analysis of factory markings on the box and case

The easiest and most reliable way to know the age of the device is to carefully examine the packaging. There is always a white sticker with technical information on the back of the brand box. Here you can find the serial number (S/N) and the date of production, which is often indicated in the format of GHG-MM or MM/GHG. This is the primary source of truth, which is worth checking first when buying from hand.

If the box is lost, check the phone itself. On many models, especially those with a non-removable battery, on the back cover or under the tray. SIM-The first digits are microscopicly labeled, sometimes the date is encrypted in the serial number. SN It could indicate the year and week of release, although in modern devices Xiaomi often uses complex hashed strings.

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Always check the serial number on the box, warranty card and phone settings - they must be completely the same. The discrepancy indicates a possible replacement of the case or replacement of the device.

Note that stickers can fade or unstick over time. If the information on the box is difficult to read or looks suspicious (for example, pasted over another label), this is an occasion for deeper verification through software.

Use of the Engineering Menu to Check Date

In the Android operating system, which runs Xiaomi smartphones, there is a hidden section for engineers and testers. USSD-This method does not require an Internet connection and works even without the installed SIM-map.

To enter the test menu, you need to dial ##6484##. Once you enter the last star, the menu will open automatically. The interface may vary depending on the version of MIUI, but the principle of searching for information is the same. You will need to find the item associated with the software version or device information.

In the list that opens, look for a line called Version Information or simply CI. Inside this section, there is often a Build Time parameter that indicates the time of compilation of a firmware installed in the factory. Although this is not always the exact date of iron assembly, it gives an indication of when the phone was being trained before packaging.

⚠️ Note: Some global firmware versions may have the code-based engineering menu blocked by the manufacturer, so try using third-party apps from the Play Market.

IMEI and serial number transcription online

The most accurate way, which does not require a deep technical knowledge, is to check for a unique IMEI identifier, which is assigned to each mobile device and stored in international databases. Knowing the IMEI, you can not only find out the model, but also the approximate activation or release period.

You can find out your IMEI by dialing *#06# in the call or by looking at the sticker under the battery (if it is removable). The resulting code must be entered on specialized resources. There are many services, such as imei.info or the official Xiaomi warranty check page.

If you enter a serial number or IMEI form on mi.com/global/verify, the system will show the date of the start of the warranty. By subtracting from this date 1-2 months (average delivery and sale time), you can accurately determine the year of release of a particular instance.

When using third-party databases, be careful not to enter personal data. Some resources may show the date of first registration of a device on the network, which is also a great indicator of age. If the phone is 3 years old and it is “expanding” 1 year on the database, this is a clear sign of refraction or flashing.

Determining age through system settings

Newer versions of the HyperOS shell and newer MIUI builds have introduced a feature that allows you to indirectly find out the age of the device. Go to the Settings menu → About the phone → General information. This often indicates the date of the last security update or the version of the kernel.

Although there is no direct line, "Date of production," the experienced user can analyze the Android version and the date of the security patch. If a phone released in 2026 is a security patch for 2022, it is a wake-up call. Factory firmware always contains updates that are up to date at the time of assembly.

Also worth looking at is the Statistics or Usage section, if available. Some system meters can count from the moment the device is first turned on. This does not give a calendar date, but shows the total life of the gadget in hours or days.

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Combining several verification methods (e.g., matching the date on the box and the activation date by IMEI) gives the most reliable result and eliminates errors.

Specific dates for different Xiaomi lines

Different smartphone series may have their own marking features, such as the Redmi Note lineup often uses encoding where the year and month are encrypted in the middle of the serial number, while the flagship Xiaomi Mi series (now Xiaomi Number series) relies more on verification through global IMEI databases.

Consider the difference between the Chinese version (CN) and the global version (Global) and Chinese versions may have a production date that is several months ahead of the global market date, which is normal because the device is first tested in the home market.

For the POCO sub-brand, the situation is similar to the main lineups, but due to frequent rebrandings (when one phone goes under different names in different countries), the production date may not coincide with the date of the model announcement in your region.

Signs of a restored or old device

Knowing the year of manufacture helps to identify refurbished devices. If you buy a phone as new, but an IMEI check shows that it was activated a year ago, or the production date is much older than the date of purchase, this is a reason to be wary.

If you're on a 2-month-old phone and the USB-C connector has scuffs and oxidation, you're probably looking at a device with a longer history of use, and you're also looking at the battery cycle, which you can check with a special diagnostic app.

Another sign might be the version of the pre-installed software. Devices released years ago and in stock may have a very old version of Android that needs to be updated manually, which is not critical, but reduces the value of the purchase if you were counting on a fresh system out of the box.

⚠️ Warning: Buying an expired warranty device (even if it’s new in the box) carries risks.

Frequently Asked Questions (FAQ)