How to check the release date of the Xiaomi phone: full instructions

Buying a smartphone from hand or checking a new device for freshness is always a stressful situation for the owner. Many users want to know when exactly their gadget came off the assembly line to make sure there are no hidden defects or prolonged storage. Understanding the real age of the device helps to avoid buying refurbished models, posing as new ones, or devices with a degraded battery.

Xiaomi doesn’t provide a single “Date of Production” button in the standard settings menu, which often puts inexperienced users at a loss. However, the Chinese manufacturer has left several reliable digital traces that allow you to accurately determine the age of the device. We will analyze all available methods, from simply inspecting the box to using special engineering codes.

The accuracy of the date varies depending on the method chosen, in some cases you will only get the year of release, in others you will get a specific week of production, and for the complete picture, it is recommended to use a combination of several verification methods to eliminate possible errors in the labeling or database.

Analysis of factory packaging and stickers

The fastest and most affordable way to know the age of the device is to look closely at the original box, where there is always a white information sticker with barcodes on the back or side of the cardboard packaging, and where electronics manufacturers duplicate key information about the batch.

Look for a string that contains the production date or just a date in the format of GYG-MM. However, often the date is encrypted in the serial number or batch code. For example, the first digits of a long code can indicate the year and month of assembly. If the box is lost, this method, alas, becomes inaccessible, and you have to look for information on the case itself.

If the date on the sticker indicates release more than two years ago and the phone is sold as new, it's a reason to think about the state of the lithium polymer battery.

⚠️ Note: If the sticker on the box looks regated, has peeling marks or the font is different from the main one, this may indicate that the device has been repaired or is restored (Refurbished).

Deciphering the codes on a package often requires knowledge of the internal logistics of the delivery region. The encodings for the Chinese (CN) and global (Global) versions may differ, so if you see an obscure character set next to IMEI, it's best to check it against the data obtained by software methods.

Checking dates through IMEI and online services

The most reliable source of information is the official manufacturer's databases, each smartphone has a unique IMEI ID that is assigned at the factory, and knowing this number, you can ask for information about the date of activation or first registration of the device on the network.

To find out IMEI, dial the universal code *#06# in the phone app. Once the information appears on the screen, copy the 15-digit number. Next, go to the official Xiaomi authentication site or use trusted third-party resources that have access to factory databases.

Enter the code in the appropriate box on the site. The system will give the status of warranty and, most importantly, the date of first activation. This date almost always coincides with the date of purchase or immediately follows the date of production (usually production takes place 1-3 months before sale).

• 📅 Official website of the check - gives the most accurate information about the status of the guarantee.
• 📱 Third-party services – may provide additional technical configuration information.
• 🔒 Checking by IMEI — The only way to know the date for a boxless device.
• 🌐 Global databases – take into account activation in any country in the world.

If the phone was purchased in a gray way without registering in the region, the activation date may not be displayed or be incorrect, in which case, focus on the production date of components, which can sometimes be pulled through the engineering menu.

Use of engineering menus and hidden codes

For advanced users who lack the superficial information, there is access to the deep system layer through the engineering menu, which is a hidden partition of the Android operating system and the MIUI or HyperOS shell, designed for hardware testing.

To get there, open the Phone app and enter the code ##64663##. If the code is entered correctly, the CIT menu will open. Although direct production date is rarely displayed here, you can check the hardware revision version, which indirectly indicates the release period.

In some firmware versions, especially Chinese ones, the Version or Information section may display a software compilation date or sensor calibration date, often close to the device's assembly date. Look for items that contain the words Build Time or Calibration Date.

#64663## - Entrance to the CIT Engineering Menu


*#06# - Displaying IMEI and serial number

Be careful when changing the settings in the engineering menu, and if you accidentally activate some tests, you can reboot or temporarily inoperate the communication modules, and you can only read the information without changing anything.

Decoding the date code on the battery (for older models)

Smartphone owners with removable batteries have a unique opportunity to look inside the device. The battery itself, under a specification sticker, often has codes indicating the date of production of the cell. For non-removable batteries, this method is only applicable if there are x-rays or parsing, which is not recommended.

The code is usually a combination of numbers and letters. For example, the first four digits may indicate the year and week of production (2305 - 5th week of 2023), the letter designations may indicate a shift or a specific manufacturer.

It is important to understand the difference: the battery production date may differ from the phone assembly date by several weeks, however, if the difference is more than 6 months, it is an alarm signal.

Analysis of system logs and firmware information

The operating system stores many timestamps. The installation date of the firmware often coincides with the final assembly date of the device on the conveyor, which can be found in the About Phone section, but it shows the date of the software build, not the hardware.

For more accurate data, you can use Google Play apps like Device Info HW or AIDA64, which read system logs and can show the time of the last reset or the time elapsed since the first download (uptime in terms of calendar).

If you see in the logs that the system time has been reset repeatedly or the date of the first download is very different from the date of purchase, this may indicate a flashing device.

You should also check the date of creation of the system folders. Go to the file manager, turn on the hidden files and look at the date of creation of the root folders of the system. If the phone is supposedly new 2026 and the folders are dated 2021, you have a restored or used device.

⚠️ Note: System analysis applications require permission to access device data. Only download proven high-rated software to avoid passing personal data to third parties.

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Keep screenshots of the About Phone menu and purchase checks in the cloud, in case of disputes with the seller or warranty repairs, this will help prove the date of purchase and the original condition of the software.

Comparative analysis and conclusions

None of these methods can guarantee 100% without a comprehensive approach, and the best results are achieved by cross-checking the date on the box, the IMEI activation date and the firmware assembly date, and the discrepancy of more than 2-3 months between these parameters requires additional explanation from the seller.

Devices that have been in storage for more than a year can have reduced battery life. Lithium polymer components age even without use. Therefore, knowing the exact release date helps to estimate the residual life of the battery before active use.

If you are buying a flagship model Xiaomi, Redmi or POCO, feel free to ask the seller for information about the origin of the device.

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Ideal situation: the production date on the box, the activation date by IMEI and the firmware assembly date differ from each other by no more than 1-2 months.

Frequently Asked Questions (FAQ)