How to find out the exact release date of the Xiaomi Redmi 9

Xiaomi smartphone owners often face the need to know the exact release date of their device, and the Redmi 9 is no exception. This information is critical when buying a used gadget, issuing a warranty or simply to satisfy technical curiosity. Knowing the age of the device, you can predict the approximate wear of the battery and the relevance of the software.

There are several proven ways to get this data, from analyzing factory markings on the case to using hidden engineering menus. The accuracy of the determination depends on the method chosen, so it is recommended to double-check the information from different sources. In this article, we will discuss each of the available options in detail.

Don't just rely on the date of first activation in your Google or Mi Account, as it may be different from the actual day you roll off the assembly line. The factory date always precedes the date you first activate the user. Let's look at how to get the most reliable information.

Analysis of factory markings on the box and case

The easiest and most reliable way to avoid having a device or third-party software installed is to examine the packaging. The back of the original Redmi 9 box always has a barcode and technical information sticker. The bottom of this label often indicates the date of production in the format of GYYG-MM or GYG/MM/DDD.

If the box is lost, you can search for the actual body of the smartphone. However, in modern Xiaomi models, including the Redmi 9, the direct release date is rarely printed in small print under the battery (which, by the way, is non-removable).

Note the quality of the label printing. On the original devices, all barcodes are clear, and the dates on the box and in the system (if the phone is already on) should be the same or minimally different.

⚠️ Note: If the date is erased, interrupted or pasted on top of another label, this is a sure sign that the device may have been repaired or is a refabricated (restored) copy.

Use of service IMEI-code-check

Each smartphone is assigned a unique identifier IMEI (International Mobile Equipment Identity, which contains encrypted information about the model and sometimes about the year of release. For Redmi 9, this code can be found on the box, under the tray. SIM-cards or by dialing a universal command in the dialer.

Enter the code *#06# in the Phone app. The screen will show the data on two of the following: SIM-Write down the 15-digit number first. SIM. You can use online services to decrypt, although they do not always show the exact day, but the year will indicate correctly.

There is also a hidden method of checking through the engineering menu, which works on many MIUI firmware. Enter the code ##6484## or ##4636##. In the CIT or Testing menu that opens, select Version or Status, which may display information about the build and compilation date of the software, which indirectly indicates the age of the device.

• 📱 Find it. IMEI on a sticker under a SIM card tray.
• 🌐 Enter the number on the official Xiaomi warranty check site.
• 📅 Compare the end date of the warranty with the purchase date to calculate the start date.
• 🔍 Use third-party databases IMEI deep-study.

It is important to understand that IMEI is primarily designed to identify a device on the network, not to accurately date, but (in combination) with other methods, it gives a clear picture.

Checking the date through the engineering menu and settings

Android, which is controlled by the MIUI shell, has a lot of diagnostic data hidden. To find out the release date of Redmi 9 through system logs, you can use the About Device section. Go to Settings → About Phone and quickly click on the MIUI version several times.

This action activates the extended menu. Although there is no direct release date, you can look at the installation date of the current firmware. If the phone is new and it has factory firmware, the installation date will be close to the date of production. If the firmware has been updated, the date will be current.

Another method is to use ADB (Android Debug Bridge) via a computer, and by connecting your phone over USB with debugging enabled, you can request system properties. The adb shell getprop ro.build.date.utc command will return the compilation time of the current firmware in Unix-time format.

For users who don't want to mess with the command line, there are informant apps that read system files and output the kernel or system assembly date, which often coincides with the release period of a particular batch of phones.

⚠️ Warning: Hard Reset may change some timestamps in system logs, so check the date before cleaning the device.

Decoding the serial number in Mi Account

The official and most reliable way is to use a Mi Account, where if the phone was linked to the account when it was first activated, the date of its first activation is stored on Xiaomi servers, the closest release date to an end user.

Visit the official Mi Account website from a computer or other device. Sign in with the same login as Redmi 9. Select your smartphone under Devices. Details often include warranty status and activation date.

The serial number (S/N) also contains the coded date. Usually the first digits or letters after the model prefix indicate the year and week of production. For example, the numbers "20" can mean 2020, and the next two digits - the week of the year. The exact coding algorithm Xiaomi often changes, but the year usually fails to calculate.

If you buy a phone with your hands, ask the seller to show you a screenshot from your Mi Account account with an activation date, which is the best way to make sure that the phone is not a “restored” old device that was passed off as a new one.

Analysis of the Software Assembly Date

Software is another time marker, the Redmi 9's factory firmware was released in mid-2020, and if a device sold as "new, sealed" has a version of MIUI dated 2021 or 2022, it's either been in storage for a long time with the update or, more likely, it's been opened.

You can view the build date from Settings → About Phone → MIUI version. Click on the tri-point in the corner and select System Settings (if available) or simply pay attention to the build number. It is easy to find the release date of a particular firmware version on the Internet.

MIUI Global 12.0.3 Stable


Release Date: July 2020

If the difference between the firmware release date and the current one is big, and the phone is supposedly new, that's a reason to think, but if the phone was immediately connected to Wi-Fi, it could automatically update, so this only works if the phone has never been connected to the network.

• 📅 Find out the version number of the firmware in the settings.
• 🔍 Find the release date of this version for your model.
• ⏳ Compare the release date of the software with the purchase date.
• 🚫 Consider the possibility of automatic updates.

Comparative table of verification methods

For ease of perception, we will bring all methods into a single table, which will help you choose the best option for checking depending on your capabilities (if you have a phone on your hands, whether it turns on, whether there is a box).

As you can see from the table, the most versatile and accurate method for the average user is to check through a Mi Account or examine the box. Software methods are good for technical analysis, but only give indirect data.

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When buying a used Redmi 9, pay attention to the state of the charging connector. If the 2020 phone is being used actively, the connector may have a backlash or oxidation traces, which will confirm the real age of the device better than any program.

Frequent Questions and Answers (FAQ)

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The combination of checking the date on the box and the date of first activation in the Mi Account gives you a 99% guarantee that you know the real age of the device.