How to know exactly the release date of the Xiaomi Redmi smartphone: from the serial number to the hidden menu

Did you buy a Xiaomi Redmi from hand or at a sale, but doubt the honesty of the seller? Or do you want to check whether you sold a “repainted” model of the past years under the guise of a new product? The release date of the smartphone is a key parameter that affects the relevance of the firmware, battery status and even the market value of the device. Unfortunately, Xiaomi does not specify the date of production directly in either the settings or on the box, but there are at least 5 working ways to determine it.

In this article, we'll look at everything from decrypting the serial number to analyzing hidden system data, how to distinguish the 2023 Redmi Note from the 2022 rebranded model, why the date on the box may not match the real one, and what to do if the serial number is erased, and a unique IMEI verification algorithm that works even for devices without the original packaging.

1. Serial number decoding: what hides the code on the box and in the settings

The most reliable way is to extract the date from the serial number (Serial Number or S/N), which Xiaomi has 11-14 characters, which are encrypted month and year of release, the format of the code depends on the year of production:

• 📅 2018–2020: serial begins with a letter (e.g., a letter, M1903F...), where the second and third digits are a month, the fourth is a year (example: M1903F... = March 2019).
• 📅 2021-2026: the format has changed XXXXXYYMM..., where YY — year, MM — month (example: ABCD2305... = May 2023).
• ⚠️ Exceptions: Redmi models K50 and newer can use a mixed format - check the table below.

Where to find the serial number:

1. On the original box (barcode sticker).
2. In phone settings: Settings → About phone → General information → Serial number.
3. Under the removable lid (for models with removable battery, for example, Redmi 4A).
4. The command *#06# will display the IMEI and serial number.

⚠️ Note: If the serial number on the box and in the phone settings do not match, this is a sign:

• 🔄 Repackaging of the device (often found in "gray" sellers).
• 🛠️ Repair with replacement of the motherboard (serialist is tied to it).
• 🚨 Fakes (especially for Redmi Note) 10/11, copy-paste).

2.IMEI check: how to find out the release date without a box

IMEI (International Mobile Equipment Identity) is a unique phone identifier that can also contain information about the date of production, unlike the serial number, it can not be forged software (only by soldering the chip).

Instructions:

1. Find out your Redmi's IMEI: Dial *#06#. Look at Settings → About Phone → General Information → IMEI. On the original box (under the barcode).

IMEI.info

Enter the IMEI in the verification field.

Manufacture Date

Date of Production

Check the second IMEI (for two-symbol models)

Use an alternative service (e.g. imei24.com)

Verify the data with the serial number

Try the method through the engineering menu (section 4)

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⚠️ Attention: Services IMEI This may not be the exact date for devices released after 2023, which is because Xiaomi has started using new encryption algorithms in the past few years. IMEI For the Redmi Note 12 Pro models+ In this case, trust only the serial number or the data from the engineering menu.

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

The original Xiaomi Redmi package contains several dates, but not all of them indicate the actual age of the device.

Where to look:

• 📦 The sticker on the box: look for the line MFD (Manufacture Date) or Date of Production: YYYY-MM-DD or MM/YYYY.
• 🏭 Battery sticker: models with removable battery (for example, Redmi) 5A) date stamped on the battery.
• 📄 Warranty card: date of sale ≠ Production date! Warranty starts from the moment of activation, not release.

⚠️ Warning: The date on the box may be 1-3 months ahead of the actual date of the phone's release. This is due to logistics: Xiaomi prints the package in advance, and the device is assembled later. The difference is more than 3 months - cause to doubt the originality of the box.

Always, it's a must.

Only if the price is suspiciously low

Never, I trust a salesman.

I don't know how to do that.-->

How to distinguish the original box:

• 🔍 Barcode: must match the code in the phone settings (Settings) → The phone. → Status SIM-map → IMEI/SN).
• 🎨 Print quality: counterfeits often blurred fonts, mismatch of colors of the Mi logo.
• 📏 Sizes: the original Redmi box has clear gaps and magnetic lock (for 2020 models)+ year-end).

Engineering menu: hidden data about the date of production

If the serial number is erased and the box is not, you can try extracting the date from the Engineering Mode, which works for 80% of Redmi models, but you need to be careful that wrong actions can cause a system failure.

Instructions:

1. Open the Phone app and enter the code ##4636## (newer models may require ##3644633##).
2. In the menu that opens, select Phone Information.
3. Scroll down to the Hardware Info or Manufacture Info block.
4. Look for MFG DATE, PRODUCT DATE, or BUILD TIME.

⚠️ Note: In the Redmi Note 12 and later, the date can be displayed in UNIX-time format (for example, 1672531200.

💡

If the engineering menu does not open, try entering the code through the Calculator application: dial ==3644633== and press =.

What to do if there is no date:

• 🔧 Try the alternative code: ##225## (for Redmi 9/10).
• 📱 Install the app MTK Engineering Mode (MediaTek processors only).
• 🖥️ Connect your phone to your PC and use it ADB-command: adb shell getprop ro.boot.ddr (can give a firmware assembly date close to the production date).

5. Analysis of firmware and MIUI version: indirect signs of age

Even if you can’t find direct release dates, the MIUI version and update dates can give you an approximate age of the device, a method less accurate but useful for checking “repainted” phones (for example, when the Redmi 10 is given as a Redmi 11).

How to check:

1. Open the settings → About the phone → version of MIUI.
2. Remember the version (e.g. MIUI Global 14.0.5).
3. Go to the official MIUI update tracker website.
4. Enter the phone model and see the date of the first release of your firmware version.

🔍 Example: If your Redmi Note 11 Pro is working on MIUI 13.0.4, and the first stable version MIUI 13 for this model was released in January 2022, then the phone is definitely not older than this date.

⚠️ Note: This method does not work for custom firmware devices (like LineageOS or Pixel Experience).If the phone has been overflashed, the firmware date does not reflect the actual age of the iron.

💡

If the MIUI version on the phone is older than the official release date for that model, you are 100% fake or relabeled.

6.Physical inspection: what gives the “older” Xiaomi Redmi

If no digital methods have worked, look for physical signs that indicate the age of the phone, especially when buying from hand, when the seller may be hiding the actual release date.

What to watch:

• 🔋 Battery: Bloating (even light) is a sign of a battery older than 2-3 years. Capacity below 80% of the declared (checked in Settings) → Battery → Battery status).
• 📱 Case and screen: Yellow screen backlight (characteristic of AMOLED-displays 2020 Deleted inscriptions on the SIM-buttons or trays (Redmi) 8/9).
• 🔌 Charging port: shattered USB-C Or oxidized contacts indicate long-term use.

💡 Tip: Ask the seller to show Settings → Memory. → Internal memory. → If there's a folder with a date of creation. 2019–2020 years, for example, DCIM/2020-05-15), This indirectly confirms the age of the device.

7. Check through official Xiaomi services

If you doubt the authenticity of the phone, you can refer to the official tools of Xiaomi. They do not always show the release date, but help to confirm the originality of the device.

Methods of verification:

1. Authentication site: Go to mi.com/global/verify. Enter IMEI or serial number. The system will show the status of the device (Genuine Mi Product or Invalid).
2. Mi Verify app: Download the official app from Google Play. QR-box code or enter data manually.

Appeal in support:

• Write to the support chat Xiaomi with a request to confirm the release date by IMEI.
• Add a photo of the box and phone (especially if you have doubts about the originality).

⚠️ Note: Xiaomi’s official services may not respond to production date requests for devices older than 3 years, in which case use a combination of methods from the previous sections.

FAQ: Frequent questions about the release date of Xiaomi Redmi

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💡 When buying a used phone, always record the serial number and IMEI video before transferring money.