How to find out the release date of the Xiaomi Redmi phone: official and hidden ways

Buying a Xiaomi Redmi smartphone in the secondary market or even in the official store is often accompanied by the question: how to check how much “fresh” device you sell? The release date of the device affects not only the residual warranty life, but also the battery status, the version of the preinstalled software, and sometimes the presence of hidden defects in the series. For example, the Redmi Note 8 Pro models released in the first months of production suffered from overheating of the Mediatek Helio chipset. G90T, which was corrected in later installments.

In this article, we will discuss 5 working ways to determine the release date of Xiaomi Redmi – from analyzing the serial number to checking through the engineering menu. You will learn what data can be extracted from the box, where to look for hidden tags on the phone itself, and why information from Settings. → The phone is often misleading, and we'll focus on decoding the factory code that the manufacturer disguises as a random set of characters.

1. Decoding of the serial number (S/N) — date-key

Serial Number (Serial Number, S/N) — It's a unique identifier that Xiaomi assigns to each device, and it encodes information about the model, the place of production, and, more importantly, the date of release. S/N possible:

• 📦 On the sticker under the battery (for models with removable battery, for example, Redmi) 4A)
• 📱 Settings menu → The phone. → General information → Serial number.
• 🖱️ In the Mi program PC Suite when connected to a computer
• 📄 On a warranty card or box (if not erased)

Xiaomi’s serial number format usually looks like this: ABCD12345678, where:

• First-time 3-4 symbol - the model code (for example, HMN For the Redmi Note 9)
• The following: 2-4 symbol - the date of production in the format of MGN or MMYG (depending on the year of issue)
• The remaining numbers are the serial number of the device on the conveyor

Example of decryption for serial number HMN5A1B2C3D4:

⚠️ Attention: After 2021 Xiaomi has changed the format of the date encoding, now instead of letters, numbers are used, where the first pair is a year (for example, for example, the first pair is used, 22 = 2022), And the second month (03 = More information on the new rules is available in the next section.

New rules for date coding (2021–2026)

Since 2021, Xiaomi has moved to a more unified standard for marking dates in serial numbers.

• GG - last two digits of the year (for example, 23 = 2023)
• MM – month (01 to 12)

Examples of decoding for modern models:

• 2205 → May 2022 (Redmi Note 11 Pro)+)
• 2311 → November 2023 (Redmi 12)
• 2402 → February 2026 (Redmi Note 13 Pro)

To find these numbers in the serial number, look at the position after the model code. S/N 22101FYG56789:

• 2210 - October 2022
• 1FYG56789 — serial

⚠️ Note: Some Redmi models (e.g., the K-series line for India) may use an alternative format where the date is encoded at the end of the serial number.If the first 4 characters after the model code are not similar to the date, check the last 4 digits before the serial number.

Make sure the number matches on the box and in the phone settings|

Check the length S/N (must have 11–14 symbolism)|

Contrast the model code with the official list of Xiaomi|

Use online services for validation (e.g. IMEI.info)

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3.Date on the box and stickers - where to look?

If the phone was bought in its original packaging, the release date can be found on the box itself or on stickers.

1.A barcode sticker (usually on the end of the box) contains:

• 📅 Date of Manufacture (DOM) — explicit date in MM/GYYYY or GYYYY-MM-DD format
• 🔢 S/N — serial number (duplicates data from the phone)
• 🏭 Made in India (Made in India for Redmi models) 9i)

2 Hidden marks on the box:

• 🖋️ Handwritten date on the inside of the valve (sometimes put by warehouse workers)
• 📦 Batch Code – may coincide with the date of production (example: 202305) = May 2023)

⚠️ Warning: The date on the box may not match the actual date of the phone's release! The manufacturer often uses "universal" packages released in advance. A difference of 2-3 months is considered normal, but if the box is six months older than the phone - this is reason to doubt the originality of the device.

Example of discrepancy:

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If the sticker on the box looks suspicious (blurred font, color mismatch), check it under ultraviolet light - the original Xiaomi tags have protective watermarks.

4. check through the engineering menu and ADB-team

For experienced users, there is a way to find out the release date through the engineering menu or ADB-This method works even if the serial number is erased or forged.

Method 1: Engineering menu (for Qualcomm processors)

1. Open the phone app and enter the combination: ##4636##
2. Go to the section Information about the phone
3. Scroll down to the Hardware Info block – there may be a Manufacture Date string

Method 2: ADB-teams (requires PC)

1. Connect the phone to the computer with debugging enabled USB (Settings → For developers → Debugging by USB)
2. Enter in the command line: adb shell getprop ro.boot.ddr_info or adb shell getprop ro.boot.date
3. In the answer, look for a line of view manufacture_date=20230815 (15 August 2023 year-end)

⚠️ Note: Not all Redmi models support these commands, such as Mediatek processor-based devices (e.g. Redmi). 9A) You may not display the date through the engineering menu, in which case only the serial number analysis or a physical inspection of the board will help (see the next section).

5. Physical examination: date on motherboard

If the phone is disassembled (for example, for repair), the release date can be found directly on the motherboard, which is 100% accurate, since the manufacturer applies the labels with a laser.

Where to look:

• 🔍 Next to the processor (chipset) – often specified month and year in format YYMM (for example, 2203 = March 2022)
• 📌 Under the battery - on a white sticker with QR-code
• 🖲️ Near the connector for the screen plume - in small print

Example of tags on the board Redmi Note 8 Pro:

• 1911 – November 2019 (date of payment production)
• V1.2 — Version of the audit (not to be confused with the date of the audit!)
• MI 919 - batch code

⚠️ Note: The date on the board may be 1-2 months earlier than the date of final assembly of the phone.This is because the boards are made separately from the cases and screens:

• 🔄 Use of old spare parts (typical for budget models)
• 🛠️ Repair or change the fee (check your device history via Mi Account)

6. Online services for checking the release date

If you can't decrypt the serial number yourself, you can use specialized services. S/N, IMEI or data from the box and give you the deployed information about the device.

Top.-3 reliable:

• 🌐 IMEI.info – shows the date of production, model and specifications
• 🌐 SNDeeP.info – decrypts the serial numbers Xiaomi, Samsung, Huawei
• 🌐 Mi-Code – a database for Xiaomi devices (requires registration)

How to use:

1. Enter the serial number or IMEI (You can find in the settings → The phone. → General information or on the box)
2. Choose the Xiaomi brand and model (if known)
3. Get a report with the date of production, country of manufacture and activation history

⚠️ Warning: Free services may show an inaccurate date for new models (2023-2026) because databases are updated with a delay:

1. Go to the Mi Verify website
2. Enter. IMEI or S/N
3. Convert the data with the information on the box

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The official Mi Verify service is the only source that is guaranteed to show the exact release date for devices released after 2022.

7. Indirect signs of phone 'age'

If none of the above methods worked, note the indirect signs that will help estimate the approximate age of the device:

Version 1 of MIUI and Android:

• 📱 MIUI 12.5 + Android 11 → The phone is released until mid-2021
• 📱 MIUI 13 + Android 12 → 2021–2022
• 📱 MIUI 14 + Android 13 → 2022-2023
• 📱 HyperOS → 2023-2026 (the latest models)

Battery condition:

• 🔋 Capacity ≥ 95% of the original phone is fresh (up to 6 months)
• 🔋 Capacity 85–95% – 6–12 months of use
• 🔋 Capacity < 85% - more than 1.5-2 years of operation

External signs:

• 🔍 Scratches on the screen (even micro-scratches) – a sign of active use
• 🔍 Rubbing on the on/volume buttons – phone over 1 year old
• 🔍 Yellow on the white body (especially in Redmi) 9/10) — UV exposure (more than that) 1.5 years)

⚠️ Warning: Some sellers reset the battery charge cycle meter via the engineering menu (#4636## → Battery → To avoid this, check the actual capacity through applications like AccuBattery or adb shell dumpsys battery.

FAQ: Frequent questions about the release date of Xiaomi Redmi