How to know exactly the date of production of the Xiaomi phone: from the box to hidden commands

Did you buy Xiaomi off the market or at a sale, but you doubt the seller's honesty? Or just want to know how old your smartphone is to plan a battery replacement? The phone's production date is a critical parameter that affects the cost, warranty, and even performance of the device. Unfortunately, Xiaomi (unlike Apple or Samsung) doesn't display this information directly in the settings. But there are at least 5 ways to find out, from analyzing the serial number to hidden engineering menus.

In this article, you will find step-by-step instructions for all Xiaomi, Redmi and POCO models, including the new 14, 13T series and the budget Redmi Note 12. We will discuss how to decrypt IMEI, where to look for a date on the box, and why some methods do not work for all regions, and also find out whether online checks can be trusted and what to do if the serial number is erased.

1. Serial number check (S/N) — most reliable

The serial number (S/N) is your phone’s unique identifier, which contains encrypted production date information. Xiaomi has 11-14 characters and usually starts with the letters D, F, G or H. Find it one way:

• 📦 On the device box (on a barcode sticker).
• 📱 In the phone settings: Settings → The phone. → General information → Serial number.
• 🔋 Under the battery (for models with a removable lid, for example, Redmi) 4A).
• 🖥️ Through ADB (If the phone is not turned on: connect to the PC and enter the command adb shell getprop ro.serialno

When the number is found, decrypt it according to the following rule:

Decryption example: Serial number D32107F56789 means that the phone was released in July 2021 (21 year, 07 month). Note that some POCO models (such as the POCO X3 Pro) may use a different format, with the date encrypted in 5-8 characters.

⚠️ Note: If the serial number begins with 0 or letter O/I (The zero/unit is most likely a fake. Xiaomi's original numbers never include these characters.

IMEI Analysis: Does This Method Work for Xiaomi?

IMEI (International Mobile Equipment Identity) is another unique identifier, but it doesn’t always contain a production date. However, for some Xiaomi models (especially those released before 2020), IMEI can determine the month and year of build.

To find IMEI:

• 📞 Dial on the phone keyboard *#06# - a window with a 15-digit number will appear.
• 📄 Look at the sticker under the battery or on the box.
• ⚙️ In settings: About the phone → General information → IMEI.

IMEI transcript for Xiaomi:

1. The first 8 digits are the model code (not important for the date).
2. 9-10 digits – year of production (for example, 20 = 2020).
3. 11-12 digits – month (from 01 to 12).

Important: This method doesn't work for all models. For example, the Redmi Note 10 Pro or Mi 11 may not have an IMEI date. To check, compare the data to the serial number (see section 1). If the results match, the information is valid.

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If the phone supports two SIM-He'll have two cards. IMEI (IMEI1 and IMEI2). Production date is the same for both chips, but the numbers may differ by the last 1-2 digits.

3.Date on box and stickers: where to look and what to believe

The original Xiaomi box contains a few dates, but not all of them indicate the production of the phone.

• 📅 Date of production (MF Date - usually on a sticker with a serial number in the format YYYY/MM/DD or MM-YYYY. For example, 05-2022 = may 2022.
• 📦 Packing Date – may differ from the production date by 1-3 months (logistics time).
• 🏭 Plant code - alphanumeric identifier (for example, C3M It doesn't affect the date, but it helps to detect the forgery.

Where exactly to look:

1. On a white barcode sticker (usually at the end of the box).
2. Under the film on the box (sometimes the date is hidden under the protective layer).
3. On the inside tab of the box (for Xiaomi 12 and newer models).

⚠️ Note: If the box is a year older than the serial number (e.g., the box) 2021, S/N show 2020), This could mean that the device was in stock or repackaged, as is often the case with Redmi models for the European market.

To verify the authenticity of the box, compare it. QR-code with data on the Xiaomi website:

1. Scan the code with any crawler (e.g., Google Lens).
2. The link should be to the official model page (e.g. mi.com/global/redmi-note-11).
3. If the QR leads to a third-party site, the box is fake.

4 Hidden Engineering Menus: How to Find a Boxless Date

If you don’t have a box and the serial number doesn’t decrypt, you can try getting the date through the Engineering Mode, a method that works on most Xiaomi models, but requires caution – wrong actions can lead to a system failure.

Instructions for Qualcomm processors (most Xiaomi/Redmi/POCO):

1. Open the Phone app and dial ##4636##.
2. Select Phone Information.
3. Scroll down to the Hardware Info block – there may be a Manufacture Date string.

Instructions for MediaTek processors (e.g. Redmi 9A, POCO C31):

1. Type ##36446337## (the code may not work on new models).
2. Go to Hardware Testing → Version.
3. Look for RF Date or FTA SW Version strings – these can contain a date in YYMMDD format.

Alternative way (for advanced users):

adb shell getprop ro.boot.ddr_info


adb shell getprop ro.boot.emmc_info

In the answer, look for lines with date or manufacture, manufacture_date=20220315 signifier 15 March 2022 year-end.

Enable Developer Mode (Settings → About Phone → 7 times click on MIUI version)

Connect your phone to charge (so that it doesn’t run out during the check)

Write down the serial number on paper (in case of failure)

Do not change the settings in the engineering menu without the need!-->

5. Online services to check: which can be trusted

There are dozens of websites on the Internet that promise to determine the date of Xiaomi’s production by IMEI or S/N. But most of them are either fraudulent or give inaccurate data.

How to check through the official website of Xiaomi:

1. Go to account.xiaomi.com and log in.
2. In the Devices section, select your phone.
3. Click More - there will be the line Activation Date (not to be confused with the date of production!).
4. For an exact production date, contact Xiaomi support via chat by providing S/N.

⚠️ Attention: Never enter IMEI or S/N On dubious sites offering "original verification," scammers can use this data to clone your phone or lock you through a carrier.

Physical examination of the phone: what can give age

If digital methods have failed, look for physical signs that indirectly indicate the date of production:

• 🔋 Battery: If the phone was released more than 2 years ago, but the battery keeps the charge as new (90%+ It's probably already been changed. Check it out via AccuBattery or ##4636## → Battery Information.
• 📱 Case condition: Models up to 2020 (e.g., Redmi Note 8 Pro) often have noticeable wear and tear on the plastic ends.New phones (2022)+) covered with an oleophobic layer, which is erased in 1-2 years.
• 🔌 Charging port: In devices older than 3 years connector USB-C usually shattered or has traces of oxidation.
• 📟 Sticker under the cover: On some models (for example, POCO X3 NFC) There is a date sticker under the back in format WYY (week/year, for example, W1521 = 15-I'm a week. 2021 year-end.

How to remove the back cover without damage:

1. Heat the edges with a hairdryer (temperature not higher than 60 ° C).
2. Use a plastic spatula (not metal!).
3. Start at the corner next to the power button - there is usually weaker glue.

For removable battery models (e.g. Redmi 7A), the date can be specified directly on the battery in YYYY-MM-DD format.

- Does the serial number match on the box and in the settings?

- Is there any trace of autopsy (scratches on screws, damage to stickers).

- Does the firmware match the region (in settings) → Additionally. → Region).-->

7. Frequent Mistakes and Myths About Xiaomi Production Date

When checking the production date, users often encounter incorrect information, and let's take a look at the most common misconceptions:

• ❌ Myth 1: “Date in the phone settings (about the phone)” → The date of first switching on is the date of production. Reality: This is the date of first activation (when the phone first connected to the network). It can be months or years later than the actual release date.
• ❌ Myth 2: "All Xiaomi phones are made in China, so the date on the box is always accurate." Reality: Xiaomi has factories in India, Indonesia, Brazil and Russia. Dates on boxes from different regions may differ due to logistics.
• ❌ Myth 3: “If IMEI It starts with 86, it's exactly the original. Reality: country code in IMEI (The first 2 digits do not guarantee authenticity. counterfeits can also have 86 (China) or 35 (Europe).
• ❌ Myth 4: "Date of production doesn't matter if the phone is working properly." Reality: The date of the battery life (lithium-ion batteries degrade even without use) and support for upgrades (models older than 4 years don't usually get new versions) MIUI).

What to do if the data is conflicting?

1. Compare S/N, IMEI and date on the box. If all three sources agree, the information is reliable.
2. If there are discrepancies, contact Xiaomi Support with photos of the box and phone.
3. To verify authenticity, use the official Mi Verify app (available on Google Play for some regions).

FAQ: Answers to Frequent Questions