Knowing the exact year of Xiaomi Redmi is critical when buying a used device, warranty repairs or authentication. Even seemingly identical models can vary by 2-3 years - this affects battery health, update support and market value. The manufacturer does not always specify the date of production on the case, but there are official and hidden methods to determine the age of the phone with an accuracy of up to a month.
In this article, we will discuss 5 working methods, from IMEI analysis to serial number decoding, including nuances for different Redmi lines (Note, K-series, numerical models), focusing on common errors that cause users to get incorrect data, and explain why some online services show conflicting information.
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1. IMEI check: the most reliable method
IMEI
manufacturer, model and date of release
Xiaomi Redmi
year and week of production
To find out the IMEI of your Redmi:
- 📱 Type on the phone keyboard *#06# - the code will be displayed automatically.
- 📄 Look at the sticker under the battery (for models with removable battery) or in the tray SIM-map.
- 📦 Find on the box - usually under a barcode.
Next, decode the IMEI using IMEI.info or manually:
- Take the first 8 digits (for example, 86952404).
- The 7th and 8th digits are the year of issue (in example 04 = 2014).
- The 5th and 6th digits are the week of the year (in example 24 = 24th week, June).
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If the IMEI starts with 86, the phone is made in China, and codes 35 or 01 indicate assembly for the global market (India, Europe).
⚠️ Attention: On the fake Redmi IMEI It can be cloned or not conform to the model. Always check the code against the data in the box and in the settings (Settings) → The phone. → General information).
2.Serial number: where to look and how to decrypt
The serial number (S/N) is another unique identifier that contains information about the date of production. Xiaomi has 14 characters (letters and numbers), where the first 4 characters code for the year and month.
Where to find the serial number:
- 📱 Settings menu → The phone. → Version. MIUI → Serial number.
- 📦 On the box sticker (near the barcode).
- 🔋 Under the battery (for older Redmi models) 4A/5A).
An example of decryption:
Serial number: L7N1C19A123456
L7N1 is the model code (Redmi Note 7).
C19 – year and month: C = 2012 + 7 = 2019, 1 = January.
A123456 is a unique device identifier.| Letter of the year | Corresponding. | Example of model |
|---|---|---|
| A | 2010 | Redmi 1S |
| C | 2012 | Redmi Note 3 |
| E | 2014 | Redmi 2 Prime |
| G | 2016 | Redmi 4X |
| J | 2019 | Redmi Note 8 Pro |
⚠️ Note: Starting in 2020, Xiaomi has changed the format of serial numbers for some models (e.g. Redmi 9).If the first 4 characters do not contain letters, use the method of checking by the number of the first 4 characters. IMEI.
3. Production date on the box: what do the codes mean
The original Xiaomi Redmi box always contains hidden release date information in the form of a barcode or printed code.Look for a string that starts with MFD (Manufacturing Date) or DATE.
Date formats on the box:
- 📅 YY/MM/DD — for example, 21/05/15 = 15 may 2021 year-end.
- 📅 YYWW — year and week, for example, 2035 = 35-I'm a week. 2020 year-end).
- 📅 YYYYMMDD — Full date (available on new Redmi models) 10/11).
Where to look:
- 🏷️ On a white sticker on the side or bottom of the box.
- 🖇️ Next to the barcode (sometimes disguised as an article).
- 📦 On the inside of the lid (for Redmi K-series models).
Example of code decryption from the box Redmi Note 9 Pro
If the box is missing or the code is erased, use alternative methods (IMEI or serial number). Remember: fake boxes often contain incorrect dates - always double-check the information.
4. Checking through MIUI: Hidden menus and commands
Firmware MIUI stores data on the date of the first turn on of the phone, which can be retrieved through the engineering menu or ADB-This method is suitable for devices that are already activated.
Method 1: Through the Engineering Menu
- Open the Phone app and dial ##4636##.
- Go to the tab Information about the phone.
- Find the Time of Work bar – the date of the first launch may be displayed here.
Method 2: ADB (for advanced users)
adb shell dumpsys iphonesubinfo
adb shell getprop ro.boot.ddr_infoIn the conclusion, look for lines with manufacture_date or build_date.
Install Xiaomi drivers on PC
Enable debugging over USB in the developer settings
Download the ADB platform (e.g. Minimal ADB and Fastboot)
Connect your phone to your PC and allow debugging
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⚠️ Attention: Date on MIUI It can reset after resetting or flashing. If the phone was recovered via Fastboot, the metrics will be inaccurate.
5. Online services: which work and which do not
There are many services available online to check the release date of Xiaomi Redmi, but only 3 of them show reliable data:
Recommended services:
- 🌍 IMEI.info - decrypts IMEI year-and-week.
- 🌍 Xiaomi official website (Authentication section) – requires entering a serial number.
- 🌍 SNDeeP.info – serial number databases for Chinese smartphones.
Unreliable services (avoid):
- ❌ Services requesting payment for “full device history".
- ❌ Sites with a database of “stolen phones” – often contain outdated data.
- ❌ Forums where experts determine a year from a photo are impossible without physical access to the device.
Before using online services, disable VPNs – some sites block requests from certain regions, and make sure that the serial number or IMEI matches the data in your phone settings.
Physical examination: indirect signs of age
If you do not have access to the IMEI or box, the Redmi age can be estimated by appearance and configuration:
Signs of an old device (2016-2018):
- 🔋 Removable battery (Redmi models) 3S/4A).
- 📶 Lack of support 4G second SIM-map.
- 🎵 Micro-USB connector instead of USB-C.
- 📷 No Night Mode Camera (up to Redmi Note 6 Pro).
Signs of a new device (2020-2026):
- 🔌 Fast charging. 33W+ (Starting with the Redmi Note 9 Pro).
- 🖥️ Frequency display 90/120 Hz (Redmi) K40 newer).
- 📡 Support 5G (index-model 5G titled).
- 🔒 Fingerprint sensor in the power button.
Pay attention to the state of the battery: if the capacity in the settings → The battery shows less than 85% of the original, the device is likely to 3+ Also check the version. MIUI — if she's older MIUI 12, the phone released until 2020.
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Even if the phone looks like new, check the release date – some vendors are replacing the battery and case to hide the device’s real age.
7. Frequent mistakes and how to avoid them
Determining the Xiaomi Redmi release year seems simple, but users often encounter false data.
Mistake 1: Trusting the date in "Settings → About the phone"
The MIUI build date line shows the firmware compilation date, not the phone's production. For example, Redmi 9 may have 2022, although the device is released in 2020.
Error 2: Using IMEIs with duplicate digits
On fake Redmis, the IMEI can consist of repeating digits (e.g. 1111111111111). Always check it with *#06# and check with the box.
Mistake 3: Ignoring the regional link
The same Redmi Note 10 could be released in 2021 for India and 2022 for Europe.Serial numbers and IMEIs for different regions differ.
Error 4: Checking by MAC-address
Some “experts” recommend using the MAC-Wi-Fi or Bluetooth address for date determination — MAC-The address does not contain information about the year of issue.