How to check the date of production of the Xiaomi phone: all ways with decryption of codes

Buying a Xiaomi smartphone in the secondary market or even in an official store sometimes turns into a lottery: the seller can hide the real age of the device, and the box can be glued. The date of production of the phone directly affects battery life, warranties and even performance (old models are more likely to have problems with updates).

Especially relevant is the issue for Redmi, POCO and Mi flagships, where the difference between the 2022 and 2023 batches could mean support for new features (e.g. HyperOS instead of MIUI 14), and we will also tell you how to distinguish a fake from the original by release date and what to do if the serial number is not readable.

Why it is important to know the date of production of the Xiaomi smartphone

Many buyers mistakenly believe that the main thing is the condition of the phone "as new", in fact, the release date affects:

• 🔋 Battery capacity: even an unused lithium-ion battery loses up to 20% of its capacity in 2 years of storage in stock. Check the date if the seller claims the phone was "laid idle".
• 📦 Warranty period: in Russia and CIS countries, the guarantee begins from the date of sale, but in the EU and China - from the date of production.
• 🔄 Update support: Xiaomi officially updates smartphones within 3-4 years of release. 2020 device may not get Android 14.
• 💰 Market value: the difference between the phone 2023 and 2021 release, all other things being equal, can reach 30-50%.

For example, the Xiaomi 13 Pro, released in December 2022, and the same smartphone, which rolled off the assembly line in March 2023, can have different versions of the MIUI out of the box and even components (for example, a newer camera module).

⚠️ Warning: If the seller refuses to provide the serial number or a photo of the sticker on the box, this is a reason to be wary. IMEI or.

Method 1: Checking by serial number (S/N) through the official service

The most reliable method is to use a serial number, which is unique to each device.

• 📄 On the sticker under the battery (if the body is removable).
• 📦 On the box (usually on the side or underside).
• 📱 In the phone settings: Settings → The phone. → General information → Serial number.

The Xiaomi serial number has the format XXXXXXXXX (9-12 digits) or a combination of letters and numbers (for example, M2004J7AC for the Redmi Note 9 Pro).

1. Go to the official Xiaomi verification site (works for most regions except China).
2. Enter the serial number and the captcha.
3. The system will show the activation date (not to be confused with production!) and the status of the warranty.

If the site does not provide information, use an alternative decryption method:

⚠️ Attention: Some models POCO If the transcript doesn't match the logic (for example, the 2023 phone shows 2015), check the number through IMEI.info.

Method 2: Checking by IMEI through the Engineering Menu

IMEI (International Mobile Equipment Identity) is a unique phone identifier that can also contain information about the date of production.

1. Dial on the phone keyboard *#06# - a window with IMEI will appear.
2. Write down the first 15-digit code (if two IMEIs, take the first one).
3. Go to IMEI.info and enter the code.

The service will show not only the date of production, but also:

• 📅 The exact model of the device (sometimes sellers give Redmi Note 10 for Note 10 Pro).
• 🌍 Producing country (China, India, Indonesia).
• ⚡ Type of network (4G/5G), This is true for models with different modifications (for example, Mi). 11 Lite 4G vs 5G).

If the site does not give a date, try the engineering menu:

Enter the dialer: ##4636###


Go to the tab "Phone Information"




Scroll to the "Build Date" block

💡

If the date on the engineering menu is significantly newer than the one on the box, it could mean that the phone has been repaired with firmware.

Method 3: Date on the box and stickers - what to look for

The original Xiaomi box contains several key tags:

1. Serial number (see Method 1).
2. IMEI (must match what's on the phone)
3. Production date in YYYY-MM-DD or MM/YYYY format (usually under a barcode).
4. Batch code – for example, 2203 can mean March 2022.

Examples of location:

• 📦 Redmi Note 12 Pro+: date on the bottom of the box next to QR-code.
• 📦 Xiaomi 13 Ultra: sticker on the end of the box with the indication of the month and year.
• 📦 POCO X5 Pro: date hidden under a protective layer of barcode (you need to illuminate the flashlight).

If the date is erased on the box when you try to peel the sticker, it is a sign of forgery or repackaging. Xiaomi's original tags are printed with thermal paint and not washed away with alcohol.

Method 4: Checking through MIUI (hidden settings)

If the phone is on, the production date can be found through the hidden MIUI menu:

In the section For developers also pay attention to:

• 🔧 Bootloader version: if you have a Locked, but the used phone is strange (usually unlocked for firmware).
• 📡 Firmware region: if you are in Russia, and firmware IN (India) or CN (China – the device could be brought in the “gray” way.

For models on HyperOS (2026 and later), the path is different:

Settings → About Phone → HyperOS → Press “Build Number” 10 times


Return to “Settings → Additional → Special Features → Developer Version”

Method 5: Hardware Verification (for advanced users)

If the phone is disassembled (for example, to replace the battery), the production date can be found:

• 🔋 Battery sticker: usually indicates month and year in format 2023-05.
• 📱 On the motherboard: look for a date engraved next to a Qualcomm or MediaTek chip.
• 🎯 On the camera module: some lots have the date of assembly marking.

Example of decoding the Xiaomi battery sticker:

MB-J41 3850mAh 4.45V


2022-11-15




Made in India

Here, 2022-11-15 is the battery's production date. Note: it may be 1 to 3 months newer than the phone's assembly date.

⚠️ Note: If the date on the battery is significantly newer than the date on the box (e.g. 2023 vs 2021), this may mean that the battery has already been replaced.

💡

The most reliable way is to combine the serial number, IMEI and the date on the box, and if two sources match, the data is reliable.

Frequent Mistakes and How to Avoid Them

When checking the production date, users often encounter:

• 🔍 Fake stickers: on a box or phone. Check the print quality - the original Xiaomi tags have clear edges and are not erased with a nail.
• 📡 Disparity of the region: the phone released for India (IN), It's sold in Russia, and it could lead to problems with the Russians. 4G-frequency-guarantee.
• 🔋 Re-flashed software: if the date in MIUI does not coincide with the hardware, the phone could be sewn to reset the meters or hide defects.

Example of red flags when buying used:

If you buy a phone with your hands, ask the seller:

1. Take a picture of the serial number on the box and in the settings.
2. Take a screenshot from the engineering menu with the date of assembly.
3. Provide a check (if the phone is guaranteed).

FAQ: Answers to Frequent Questions