Many users planning to buy a used device or wanting to check the originality of the gadget wonder how to accurately know the year of release of Xiaomi. This information is critical to assessing the residual battery life, the relevance of security updates and the real market value of the device. Electronics manufacturers rarely specify the full date of production on the case, hiding it in encrypted form or internal databases.
There are several proven ways to get reliable information about the date of birth of your smartphone, we will look at both software methods available directly in the MIUI or HyperOS interface, and external methods of verification through official services and packaging. It is important to understand that the warranty activation date and production date can vary by weeks or even months.
In this article, we will take a look at each method, explain how to decrypt serial numbers and where to look for hidden information in the system menu, learn how to distinguish refurbished devices from new ones, and understand why the year of release claimed by the seller may not coincide with reality.
Checking through system settings and About Phone
The most obvious, but not always informative, way to look at the settings menu. However, Xiaomi’s standard interface often hides the exact production date by showing only the version of the software or the date of the last security update. Users often confuse these parameters, believing that the security patch date is equal to the device release date, which is a mistake.
However, in some regional versions of firmware or on certain models, information may be displayed in the Settings block. → The phone. → All the parameters. You should look at the "Status" line or "Device Information" line here. If there's a "Date of Production" field, you're lucky, but most of the time you'll only see the serial number and the number of the product. IMEI.
For a deeper analysis, you can use the hidden engineering menu that is available on most of the brand’s devices, a powerful diagnostic tool that provides access to specifications without the standard interface constraints.
- 📱 Go to the phone app (call) on your device.
- 🔢 Type the code ##64663## (read as ##MIUI##).
- 🛠 From the menu that opens, select Version or Single Item Test to view the detailed information.
⚠️ Note: Engineering menus may vary depending on the Android version and shell MIUI. Do not change the settings in the sections, the value of which you do not know, so as not to disrupt the radio module or display.
Inside the engineering menu, you can often find the line "Build Date" or notations that will indicate the firmware assembly date, which is usually very close to the date the device left the assembly line.
If standard methods fail, don't despair. There are more reliable ways that rely on unique hardware identifiers that can't be faked software without complex intervention.
Use of the IMEI-date-code
IMEI (International Mobile Equipment Identity) is a unique 15-digit number assigned to each mobile device, and it is this code that is the key to getting information about the gadget from global databases. Knowing IMEI, you can not only know the year of release, but also check the status of the warranty, color of the case and the original region of sale.
Find it. IMEI-code can be in several ways: on the box from under the device, on the sticker under the battery (if it is removable), in the system menu along the way Settings → About a phone or just dialing *#06# in a call. SIM-The cards will show two numbers. IMEI, You can use any of them.
There are many online services available to decrypt IMEI. Mi Check's official website allows you to check the warranty, which indirectly indicates the activation date. However, to accurately determine the year of production, it is better to use specialized databases such as IMEI.info or XiaomiADBFash.
The IMEI structure contains the model code and the serial number from which you can calculate the approximate production period. For example, the first 8 digits (TAC) identify the model, and the subsequent 6 (SNR) - the serial number of the device.
It is important to be careful when using third-party sites: Enter IMEI only on verified resources, so as not to pass on your device data to scammers who may use it for cloning.
Analysis of the serial number on the box
If you still have the original packaging, it's a lot easier. On the back of the box, next to the barcodes, there's usually a sticker with basic information. In addition to IMEI, it often indicates the serial number (S/N) and, in some cases, the actual date of production in the GHG-MM format.
The serial number can also be deciphered. The format may change from manufacturer to manufacturer and year to year, but often the first two digits after the letter prefix may indicate the year of release. For example, in older Redmi and Xiaomi models, the "18" at the beginning of the SN could mean 2018.
However, you should not rely on visual inspection of the box alone, especially when buying a used device. Boxes are often confused, lost or changed. The seller can put the old phone in a new box or vice versa. So always check the number on the box with the number that appears on the screen after you enter the command *#06#.
☑️ Checking the box before buying
Note the print quality on the sticker: Xiaomi's original boxes have clear barcodes, not blurred, and a uniform font. If the sticker is overstuffed or looks suspicious, this is a reason to question the claimed year of release and the origin of the device.
Official service of verification of the guarantee Mi Verify
The most authoritative source of information is Xiaomi itself, and there is a section on the official website called "Mi Verify" where you can enter an IMEI or serial number, and the system will give you the status of warranty: "In warranty", "Isvetla" or "Not found".
While the exact production date may not be displayed here, you will see the warranty expiration date. Since the standard warranty on smartphones is 12 months (depending on the region), taking a year off the end date, you can easily calculate the year of the device activation. Usually devices activate shortly after purchase, so the activation date is almost equal to the release date from sale.
If the service shows that the warranty expires, for example, in March 2026, then the phone was activated (and therefore released and sold) around March 2023, which gives a fairly accurate idea of the age of the gadget.
| Method of verification | Accuracy of date | Required data | Availability |
|---|---|---|---|
| Phone settings | Low (software version only) | Access to the menu | Always. |
| IMEI database | High (quarter/year) | IMEI code | Online |
| Packaging (S/N) | Medium (depending on format) | Box | Only if you have |
| Guarantee of Mi Verify | High (activation date) | IMEI/Series | Online |
Using official services also ensures that you are not in a grey import that may have been in the distributor’s warehouse for a year or two before going to retail.
Decoding the code of the model and version of the software
Each smartphone is given a codename, such as davinci for the Redmi K20 Pro or ginkgo for the Redmi Note 8. Knowing the codename, you can easily find on specialized resources (such as GSMArena or XDA Developers) the exact date of the announcement and start of sales of this model.
You can find out the code name in the same engineering menu or through applications like Device Info HW. If you see that the model was introduced at the end of 2019, and the seller claims that the phone is “new” in 2018 release, this is a clear contradiction, since the device could not physically be produced before the announcement.
If a device that was supposedly released in 2017 originally had Android 10, it raises questions, as Android 7 or 8 was relevant at the time. While the firmware can be upgraded, the basic version of the software often gives a hint about the age of the iron.
Why are the production date and the announcement different?
Comparing the technical specifications of the claimed model with the real one also helps to identify fakes. If an old phone from 2016 suddenly shows the characteristics of the 2020 flagship in tests, most likely, the information in the system is software changed, and the real year of release is much earlier.
Signs of Refurbished Devices
Special attention should be paid to refurbished devices, which are phones that have been returned under warranty, repaired in the factory and sold again, and it is more difficult to know the year of release of such a device, since the date of production of the case, battery and motherboard may vary.
Often refurbished phones have a special label on the box (the word Refurbished or the letter R in the serial number) and the date of production on the box will correspond to the date of recovery, not the initial assembly, which means that the phone may be 3 years old, but according to the documents it is "fresh".
Indirect indications that the device is older than indicated may be:
- 🔋 Loss of battery capacity (checked through ADB or special applications).
- 🔌 Abrasion at the charging port not corresponding to the declared "new" state.
- 📷 Microscratch on camera lenses under magnifying glass.
⚠️ Warning: When buying a refurbished device, make sure the price is consistent with its real age, not its recovery date.
For accurate diagnosis of the battery condition, which directly depends on the year of release and intensity of use, you can use a computer and the ADB program. the adb shell dumpsys battery will provide detailed information about the charging cycles and current status, which will allow you to draw conclusions about the real age of the battery.
Frequently Asked Questions (FAQ)
Can I find out the exact date of production by IMEI for free?
Does the release year affect MIUI/HyperOS support?
What if the date on the box and menu are not the same?
How to find out the year of release if the phone is not turned on?
💡
The year of release of the smartphone is not just a figure, but an indicator of the relevance of technology, data security and residual battery life.
To sum up, the most reliable way is through a comprehensive check: comparing the date on the box, analyzing IMEI through databases, and checking the status of the warranty on the official website, which minimizes the risks of buying an old or refurbished device at the price of a new one.
Remember that even if the phone is a few years old, with proper care and timely replacement of the battery, it can serve as faith and truth for a long time.