How to know the exact date of production of the Xiaomi phone

Owning a device from Chinese giant Xiaomi is often accompanied by a desire to know everything about the gadget. Especially relevant is the question of the age of the smartphone when buying used equipment or ordering from abroad. The date of production directly affects the wear of the battery, which degrades over time even without using. Knowing the real age of the device helps to avoid buying a “lie” product from a warehouse or a restored device.

Many users mistakenly assume that the activation date and release date are the same. It's not. A smartphone could have been on the shelf for a year before it came to the first owner. It's the moment of the assembly line that is the starting point for calculating the real life of components. In this article, we will discuss all available methods for determining the age of your Mi or Redmi.

There are several ways to get this information, from simply inspecting the package to using complex engineering codes. Some methods require a computer connection, others are available directly from the settings menu, and we'll look at each option so you can choose the one that is most convenient for your situation and device model.

Analysis of factory packaging and labels

The easiest and fastest way to know when a phone is released is to look carefully at the box. There's always a sticker on the back or end of the original package, with the model, the amount of memory, the color, and most importantly, the date of production, usually denoted by the acronym Mfg Date or simply the date in the format of GHG-MM.

But you have to be careful, because unscrupulous vendors can glue labels, and if you're buying a handheld device, check if the serial number (SN) on the box matches what's displayed in the system, and the number mismatch is a sure sign that the box from another machine or device was assembled from different parts.

⚠️ Note: If the date is in the form of a code of letters and numbers, rather than an explicit date, this may mean using the internal marking of the plant.

Also note the quality of the label printing: Xiaomi's original packaging has a clear font, not lubricated, and the sticker is glued flat, blurred text or crooked paper may indicate artisanal repackaging.

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Keep a picture of the label from the box immediately after purchase, and in case of a warranty or refund dispute, this will be your main proof of the package and release date.

Checking through system settings and About Phone

The Android operating system’s built-in features and MIUI or HyperOS shells provide basic information, but rarely show the exact build date. However, there are important indirect indications in the Settings → Phone section, which displays the firmware version and sometimes the software build date, which can give a rough idea of the device’s age.

For a deeper analysis, look at the status of the device. In some firmware versions, the production date can be encrypted in the line with the kernel version or in (Detailed Info). Try repeatedly clicking on the MIUI version to get into the extended menu, although this trick often leads to update settings.

• 📱 Go to the Settings menu on the main screen.
• ℹ️ Select About Phone (About Phone).
• 🔍 Find the line Version MIUI or the internal version.
• 📅 Note the numbers at the end of the version line, sometimes containing the compilation date code.

Unfortunately, the standard interface is not always friendly to curious users, and if there is no explicit date on the menu, you will have to use more advanced tools such as: USSD-You don't have to rely on visual inspection of the interface.

Use of the engineering menu and USSD-code

The engineering menu is a hidden part of the system, designed for testing equipment by service centers, and this is often where the most accurate information about hardware and its creation is hidden, and most Xiaomi smartphones use a universal code to enter this mode.

You need to open the Phone app and dial ##6484#. Once you enter the last star, the CIT menu (Customer Integration Test) will open. This test list will look for an item associated with the version or device information (often called Version Information or Device Info).

##6484##

Inside the menu, look for Build Time or Manufacture Date lines. This can be the exact timestamp (time in seconds since 1970) or the date in the usual format. If the code doesn't work, it's possible that your firmware version blocks access to the engineering menu, which is common in global versions.

Decoding of serial number (SN)

The serial number is a unique identifier that is assigned to each device in the factory, which encrypts a lot of information, including the date of production. For Xiaomi devices, the SN format can vary, but most often the first few characters after the model prefix indicate the year and month of release.

You can find the serial number in Settings → The phone. → All the parameters or on the sticker under SIM-It's a map (if it's removable). SN duplicated in the Status menu SIM-Knowing the exact coding format for a particular model, you can "read" your age yourself.

It’s important to understand that serial number formats vary from model to model. What’s relevant for the Redmi Note 10 may not be right for the Xiaomi 13 Ultra. So decoding by SN is more of a way to get a rough estimate than an exact date.

⚠️ Please note: Never publish your full serial number and IMEI Intruders can use this data to clone a device or lock your phone through search services.

Checking by IMEI through official services

The most reliable way to check the status of the device is by IMEI, which is the passport of your phone, and Xiaomi provides official tools for checking the status of the device, which often displays an activation date close to the date of manufacture.

To find out about IMEI, dial the code *#06# in the call. After the number appears on the screen, write it down or take a screenshot. Next, go to the official Xiaomi warranty check site, enter the captcha and number, you will receive a report.

The report will show the warranty expiration date, and if you take one year away from that date (the standard warranty period in most regions), you will get an approximate activation date, and if the phone is new and not yet activated, the system can show the status of "Not activated", which is also useful to know.

There are third-party services like IMEI.info or Sndeep.info that collect databases from around the world and can show a more detailed history: color, memory and the exact date of first online inclusion.

Using ADB and computer for accurate diagnosis

For advanced users who want to get the most accurate data, including the date of screen or battery calibration, the method using the device is suitable. ADB (Android Debug Bridge. This method requires connecting the smartphone to the computer via USB-cable and availability of installed drivers.

First, activate the developer mode. To do this, go to Settings → About Phone and quickly press 7 times on the MIUI Version. Then in the advanced settings, turn on Debugging over USB. Connect the phone to your PC and allow debugging on the smartphone screen.

adb shell dumpsys battery | grep"date"

Using the command above or similar requests through the adb shell, you can unload system logs. Logs often contain records of the time of the first launch of Google services or system processes, which actually coincides with the date of build or first activation, which is the most technically complex, but also the most reliable method.

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The ADB method gives access to system logs that cannot be modified software, making it ideal for checking refurbished devices.

Frequent questions about Xiaomi’s production date