How to find out the date of production of the Xiaomi phone: all methods

Buying a smartphone on the secondary market or authenticating a new device often requires detailed information about the gadget. Owners of Xiaomi, Redmi and Poco devices face the need to know the exact release date to assess the residual battery life or warranty. Knowing when exactly your device came off the assembly line helps to avoid buying a “lie” product that could be stored in a warehouse for years in inappropriate conditions.

There are several proven ways to get this information, from simple inspection of the package to the use of special engineering codes. Serial number and IMEI contain encrypted information about the production date, which can be decrypted without complex calculations. In this article, we will break down all available methods, from the simplest to professional, so you can accurately determine the age of your device.

The special attention should be paid to the situation when the box is lost or there are no stickers on it, in which software methods and online verification services come to the rescue. The key identifier in most cases is the serial number (SN), not the IMEI, since IMEI is tied to the communication module, and SN is attached to the entire device. Let's take a closer look at each of the options available.

Use of IMEI code and serial number

The fastest and most reliable way to find out basic information about your phone is to use special information. USSD-Put a command on your phone keyboard *#06#. All device identification codes will be displayed instantly on the screen, including IMEI 1, IMEI 2 (for two-simulated models) and Serial Number (S/N). It is the serial number that we will need for further action.

Write or copy this number. It's a combination of letters and numbers that is unique to each instance. In some cases, the production date can be partially encrypted at the very beginning or end of the line, but it's better to use official resources to decrypt it accurately. Don't confuse IMEI and SN: the first is for logging in to networks, the second is for identifying a particular case and its components.

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Always take a screenshot of the screen with the IMEI and SN codes before buying a used phone to check for them in the database of stolen devices.

Once you have the codes, you can go to check them through external services or the menu of the smartphone itself. It's important to understand that the code itself does not show the date in the day-month-year format, it only gives the key to this information.

Analysis of the sticker on the factory box

If you have the original packaging, it makes it much easier. There is always a white label on the back or side of the Xiaomi box with technical information. Here is the device model, memory, color, and production date. Look for a line labeled Date or just a date in YYYY/MM or YYYY.MM format.

Often, the battery's shelf life or warranty period is indicated next to the production date, such as 2023.05, which means that the phone was manufactured in May 2023, the most reliable source, since the information is automatically applied during the assembly and packaging phase.

⚠️ Note: If the date on the box is very different (more than on the box) 2-3 month from the date of activation of the warranty or the date of the first sale, this may indicate that the device was refurbished or was lying in the warehouse of the seller for a long time.

It may also be on the label. QR-And if you scan it with your camera, you get a text string that often contains both the serial number and the date. Be careful: the sticker must be factory-based, with a clear seal. Blurred letters or re-painting marks are alarms.

Checking through the About Phone menu and device status

In modern versions of the MIUI and HyperOS shell, the production date information is sometimes hidden in the back of the system menus, but is available without third-party software. Go to Settings → About Phone → All settings. You can find the "Status" or "General Information" line here.

In some regional firmware (especially Global and EEA), the production date may be displayed directly under the "Date of Production" or "Manufacture Date" option. However, in Chinese versions (CN), this box is often replaced with "Activation Time" or not at all, in which case the system may show the date of the first activation of the Mi Account, which does not always coincide with the build date.

• 📱 Open the Settings section on the main screen.
• 📱 Select the item About phone (About phone).
• 📱 Click on All Specs or Version MIUI (push-up).
• 📱 Search for Serial Number and Production Date.

If the menu doesn't have a direct date reference, look out for the Android version and security patch.While this isn't a production date, it gives a rough idea of the device's age.A phone released in 2026 can't have a 2021 security patch out of the box (with rare long-storage exceptions).

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The availability of a direct production date in the About Phone menu depends on the firmware region and the device model.

Decoding of serial number (SN)

The serial number is the main passport of your smartphone. In Xiaomi devices, it consists of 12 or more characters. The structure of the SN is not always the same for all models, but often the first few characters or certain positions indicate the date. However, it is difficult to rely on visual decryption, since the encoding varies from factory to factory.

A more reliable way is to use online calculators or contact support to decrypt SN. The code may contain year and week of production. For example, the 5th and 6th signs sometimes indicate year and month, but this rule does not work for all Redmi Note or Mi lines.

For accurate verification, you'd better type in the serial number on the official authentication site, and the system automatically recognizes the code and gives you detailed information, including the date of exit from the assembly line, which eliminates human error and manual decryption errors.

Use of third-party applications for Android

If the built-in tools don't answer, Google Play's specialized tools come to the rescue, and applications like AIDA64, CPU-Z, or Device Info HW can read deep system information, and then launch the program and go to the Device or System section.

Here you will find the Build Date field and, in some cases, the Production Date. It is important to distinguish between these concepts: the firmware assembly date is when the software was installed in the factory, which usually occurs 1-3 weeks before the sale. The iron production date can be a little earlier.

The apps will also show the actual battery status, the number of charging cycles (if available) and the temperature of the components, which are indirect indications to help estimate the age of the device. If the app shows that the phone has been running for 500 days and the seller claims that it is new, then it is a reason to think.

Check on the official website of Xiaomi

The most authoritative source is the official Xiaomi authentication portal, which is the verification page (usually the Warranty Check section of the regional site), and you need to enter a serial number or IMEI.

The system will give the validation result: whether the device will confirm its authenticity and indicate the status of the warranty. Often, along with the warranty status, the date of activation of the device is displayed. By taking 1-2 months from this date (logistics and sale), you can approximate the date of production.

In some cases, the site may report that the device is not activated yet, which is typical for new, sealed gadgets. This is a good sign that the phone is indeed new and was in stock. If the warranty has already expired, although the phone is bought “hand-held” as a new one, this is a clear sign of used technology.

Frequent questions and problems in determining the date

Users often experience conflicting information from different sources, such as one date on a box and another on an app, which may be due to a change of case, flashing, or simply different time zones and logistics steps.

Also, there is the problem of grey imports: phones imported unofficially may have a Chinese release date, but activate in another country much later, in which case the warranty period can be calculated either from the date of production or from the date of the check, which is important to check with the seller.

⚠️ Attention: If during the inspection IMEI Through the site, it shows a model different from yours (for example, instead of the Redmi Note 10 Pro Xiaomi Mi 11), this is a sign of a case re-adjustment or a serious failure in the database.

Understanding the age of the device is critical when buying used equipment. Lithium polymer batteries age even without use. A phone made 3 years ago and lying in storage will hold a charge worse than a similar model a year ago.