How to find out the date of the first inclusion of Xiaomi: the full guide

Buying a smartphone with your hands or receiving a gift is always accompanied by a desire to know the history of the device. Owners of Xiaomi, Redmi and Poco gadgets often wonder when exactly the device was activated for the first time, this information is critical to determine the real warranty period, assess the residual battery life and understand how “fresh” the device is.

Unlike some competitors, Chinese manufacturers don’t always display this date prominently in the settings menu, but system logs store this information from the moment the operating system first boots, and there are several proven methods to get this data with high accuracy without resorting to sophisticated engineering utilities.

We're going to look at all the different ways we can go from just inspecting the package to analyzing hidden logs through a computer, and the most accurate date for first switching on is always in the persist system file or in the factory calibration logs, and that's what we're going to look at, and even if the previous owner tried to hide the age of the device, the digital traces will remain.

Analysis of factory packaging and IMEI stickers

The easiest and most accessible way to do this is to look at the factory box, and there's always a white sticker on the side or bottom of the carton, with the technical information, and it's the serial number, the IMEI, and, importantly for us, the production date, and it's usually labeled "Mfg Date," or just a set of digits in the format of GYYYYYYYY/MM.

But it's important to understand the difference between the build date and the first activation date, because a smartphone could have been in a store warehouse or in a vendor's garage for six months before it came to you, but that date is an upper limit: the device couldn't have been turned on before it was assembled.

⚠️ Warning: If the box does not have a sticker or it looks glued (uneven edges, glue marks, different font), this is a sure sign that the package has changed.

To quickly verify the authenticity of the data on the box, you can use special IMEI verification services. Enter the code from the sticker on the official Xiaomi website or third-party resources. If the service shows that the warranty on the device began much later than the date on the box, then the phone was in stock. If the warranty has already expired or activated long ago, the device was used.

Checking the status of the guarantee on the official website

Xiaomi’s official portal provides a handy tool for checking the status of a device, which only works if the phone has at least once connected to the Internet and has been activated, and the system records the moment the server first accesses the database with a unique device ID.

For the inspection you will need to find IMEI-You can see it on the back sticker (if it is preserved), on the box or by typing the combination *#06# in the "ringer". After receiving the code, go to the official support website in the guarantee check section.

Type the request into the form, and the system will give you an approximate warranty expiration date, and if you take one year away from that date (the standard warranty period in most regions), you get an approximate first activation time, which is good for its simplicity, but has a margin of error of several weeks.

Sometimes the server may not have data if the device was intended for a specific regional market (the Chinese version of firmware in the global region), but activation through the Mi Account could still pass, in which case the date of creation or the first account binding may indirectly indicate the time of operation.

Use of the engineering menu and USSD-code

In the MIUI shell and the new HyperOS, there are hidden diagnostic sections, accessible through special codes, one of which allows you to see information about the status of the test and sometimes the date of calibration, which often coincides with the date of the first turn on in the factory.

Open the Phone app and enter the code ##6484##. You will be taken to the CIT menu. Here is a long menu of tests of various modules. We are not so much interested in functionality as the ability to find the version of the software or the date of assembly of components. Some firmware versions in the Version or Status section may display the date of compilation of the current firmware, which also provides a guide.

Note that this code doesn't work on all models. Global firmware versions may have limited access to some settings. If the code doesn't work, try an alternative option to log in to the menu: ##4636##. Here, you can sometimes find usage statistics under Phone Information, although the specific date of first inclusion is rarely seen.

Be careful in the CIT menu. Accidental change of parameters in the calibration sections of the screen or sensor can lead to malfunction of the device. If you are not sure about the purpose of the item, it is better not to click on it.

System Log Analysis through ADB (Most Accurate Method)

The most reliable method used by experts is the analysis of system logs through the debugging bridge. ADB (Android Debug Bridge: This method requires you to connect your smartphone to your computer, but it gives you access to files that you wouldn't normally see, and we'll look for the date you created the system partitions or the date you first started the services. Google/Xiaomi.

First, you need to activate the developer mode. Go to Settings. → About the phone and quickly press 7 times on the item "Version" MIUI» (or "Version" OS»). After that, the menu will appear in the section “Extended settings» → «For developers. Include the item "Debugging by USB».

Connect your phone to your PC with a cable. The computer should have Platform Tools installed. Open the command line and type in a command to check the connection:

adb devices

You'll see a debugging request on your smartphone screen, confirm it. If the console displays the serial number of the device, the connection is established. Now we need to unload the log file that contains the history of the events.

adb logcat -b all -d > xiaomi_log.txt

After the unloading is complete, open the received file. xiaomi_log.txt You need to find the oldest records. Look for lines that contain the words "boot", "start", "init." The date and time of the first log entry (if the log was not cleared by resetting to factory settings) will indicate the time of the first on or last reset.

If the phone has been reset to Factory Reset, the main log will be cleared, however, in some cases, the date of creation of the persist or factory partition remains available through file system commands, but this requires Root rights, obtaining which may violate the warranty.

Age determination through Mi Account

Xiaomi's ecosystem is tightly integrated with cloud services, so if you're logging in to your Mi Account, you can try to track your activity history, go to i.mi.com from your computer, log in to the same account you have on your phone.

The Find Device section often shows a list of all the gadgets ever linked to an account. If you see your phone on the list, pay attention to the date of the add-on. Often users link the device immediately after first turning on to activate the search function, which can serve as a good reference date.

Also worth checking is the Mi Cloud cloud storage. Go to the gallery or notes and sort files by date of creation. The earliest file (screenshot, photo, note) created automatically by the system or synchronized immediately after setting up will indicate the time of active operation.

Indirect signs and analysis of the battery condition

If software methods are not available, pay attention to the physical condition. Battery charging cycles are a reliable indicator. In the Battery menu or through special applications (for example, AccuBattery), you can see the wear and approximate number of cycles. The new phone has 0-5 cycles. If the meter shows 100+ cycles, the phone is clearly more than six months.

Also worth checking is the USB-C charging connector. New devices have no or minimal scratches on the connector tongue. The presence of scuffs indicates regular use. Another marker is the condition of the oleophobic screen covering. On actively used phones, it wears off in 6-12 months, and the finger begins to slide worse, leaving more greasy marks.

⚠️ Warning: Do not buy a used phone if the seller claims it is “new but without the box” and the charging connector has clear traces of multiple connections.

Visual inspection of the speakers is also informative: the speaker grid gets clogged with dust and skin fat over time. If the mesh is perfectly clean, the phone is either new or thoroughly cleaned before selling (which should also be a warning).

What to do if the phone is old?

If you find that the date of the first switch is significantly different from the words of the seller, do not immediately panic. Lithium polymer batteries used in Xiaomi tend to degrade even without use, but when stored properly (charge 40-60%, cool place) they retain properties up to 2-3 years.

The main thing to look at is the performance of all the modules. Check the camera, the microphone, the vibration and the sensor, and if from a technical point of view the device is working, and the difference in the activation date is several months, it may just be lying goods from the store, which is not critical.

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Before buying used Xiaomi be sure to do a screen test for broken pixels and “ghost touch” (phantom presses), as this is a common problem of old panels.

However, if the device was activated 2 years ago, the warranty is no longer applicable, in which case the price should be significantly lower than the market price to compensate for the lack of service support and possible wear and tear of the battery.

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A comprehensive check (ADB + Visual inspection + Site warranty) gives a 100% guarantee of determining the real age of the device.