You bought Xiaomi off your hands or found an old gadget on the mezzanine — and now you want to know what year it is? Perhaps you doubt the honesty of the seller who assured that the smartphone is “almost new”, or just want to understand whether to update the firmware on an outdated model. In this article, we will examine all the working ways to determine the year of release of Xiaomi devices — from official methods to little-known life hacks that work even without access to settings.
It's important to understand that the date of production and the year of release are not always the same. For example, a smartphone could be assembled in December 2022, but it did not go on sale until March 2023, we will teach you how to distinguish these nuances and show you how to verify the authenticity of information, and also find out why some methods (like IMEI verification) do not work for Xiaomi - and how to replace them.
Serial number: main key to the production date
The most reliable way is to decrypt the serial number (Serial Number or S/N), which Xiaomi encodes the month and year of the device’s build, but the format depends on the type of technology, for example, one system is used for smartphones and tablets, and another system is used for smartwatches and routers.
Where to find the serial number:
- ⌚ Smart watches/bracelets: in the Mi Fit app or on the back of the case.
How to decipher:
- 🔢 Smartphone format (2015–2026 first 4 The numbers after the letters are a year and a month: S/N: M2004J19C, where 2004 = spring 2020 year-end.
- 📅 Format for routers: 3-me 4-I'm numbers, year, 5-me 6-I'm a week: S/N: 202105123456 → 5-I'm a week. 2021 year (February).
An example of decryption for Redmi Note 10 Pro
⚠️ Warning: Serial numbers are often forged on fake devices, and if the transcript shows a year before 2015 (when Xiaomi started mass production), it’s a sure sign of fake.
2. Box and sticker check: what to look for
The original Xiaomi packaging contains a few date tags, but not all of them indicate the year of release of your device.
Where to watch:
- 📦 Barcode on the box: the first 4 digits after the country of origin (usually 69 for China) are the year and month. Example: 6941230205123 → 2020, 5th month (May).
- 🏭 Factory code sticker: look for lines like MFD (Manufacturing Date) or DATE. Format: YY/MM/DD or YYWW (where WW — week-long).
- 🔖 Security hologram: on new models (2022)+ (d) hidden under the scratched layer QR-production-code.
Note the country of origin (indicated on the box) and devices assembled in India often have a different date format, such as MMYY instead of YYMM.
On the box | In the device settings | By serial number | Asking the seller | Not checking-->
| Type of device | Date-dated place. | Date format | Example |
|---|---|---|---|
| Redmi/Poco smartphones | Sticker under the lid | YYMM | 2103 → March 2021 |
| Mi TVs | Back panel (label) | YYWW | 2035 → 35th week of 2020 |
| Mi Router routers | Lower sticker | YYYYMMDD | 20220815 → 15 August 2022 |
| Smart watch Mi Band | Box (barcode) | YYMM | 2301 → January 2023 |
3. System settings: hidden firmware data
If you don't have a box, but the device is turning on, you can find out the year of release through the firmware version and the date of its assembly, which works for Xiaomi smartphones, tablets and TVs.
Instructions for smartphones:
- Open the settings → About the phone → version of MIUI.
- Tap 7-10 times on the kernel version line (you will receive a notification “You became a developer”).
- Back to Settings → Additionally. → For developers.
- Find the item "Build Date" format: YYYYMMDD.
Nuances:
- 📅 The firmware assembly date is usually 1-3 months later than the device’s manufacturing date.
- 🔄 If the firmware has been updated, the build date will be relevant for the latest version, not for the factory version.
- ⚠️ On custom firmware (like LineageOS), this method does not work.
Enable the developer mode|Find "Assembly Date" in the menu|Compare with the release date of the model|Consider the possible difference in 1-3 month-->
For Mi TVs, TV The other way: Settings → About the device → Software version. Here, look for the Build string, which is the format: MIUI-TV/version/date where the date is in the format YYMMDD.
4. Online services: IMEI and S/N checks
Many users try to check the year of release through IMEI, but for Xiaomi this method does not work, because databases like IMEI.info or SNRimei do not contain information about the dates of production for Chinese brands.
Working services for Xiaomi:
- 🌐 Xiaomi official website: enter the serial number on the support page (link).The system will show the warranty activation date, which usually coincides with the date of sale.
- 🔍 Mi Account: If the device is linked to a Xiaomi account, the first activation date is displayed in the personal account.
⚠️ Note: If the official Xiaomi website checks for a “Device not found” message, it may mean that the gadget is fake or intended for the domestic market of China (models with the prefix C in the name, for example, Redmi Note). 10C).
The only reliable online method is to check through the official Xiaomi service by serial number. All other sites (including the popular IMEI checkers) give inaccurate or outdated data for this brand.
Physical examination: indirect signs of age
If none of the above methods worked, look for external signs that help determine the year of release:
For smartphones:
- 🔋 Type of charging port: Micro-USB → until 2019; USB-C → 2019–2026; No port (wireless charging) → 2023+ (Mix Fold series).
- 📶 Network support: if the specifications are only 4G, model older than 2020. 5G It has been in the Xiaomi lineup since 2020 (Mi 10).
- 🎨 Design: Models before 2018 had physical navigation buttons, after – only touch.
For Mi TVs:
💡
If the back of a smartphone has the words “Designed by Xiaomi” on it, rather than “Manufactured by Xiaomi”, it’s a 2022 model or newer – the brand has changed the labeling since that period.
6. Comparison with the database of model release
If you know the exact model of the device, you can check the official release dates. Xiaomi publishes this information on its website, but it is often hidden in press releases or archives.
| Model | Announcement date | Start date of sales | Approximate year of production of the first batches |
|---|---|---|---|
| Redmi Note 10 Pro | March 2021 | April 2021 | January-February 2021 |
| Xiaomi Mi 11 | December 2020 | January 2021 | October-November 2020 |
| Poco X3 Pro | March 2021 | April 2021 | February 2021 |
| Mi TV Q1 75" | June 2020 | July 2020 | April-May 2020 |
| Mi Band 7 | May 2022 | June 2022 | March-April 2022 |
Note that the production date of the first batches is usually 2-4 months earlier than the start date, due to logistics and preparation for release.
To check for rare models, use the Xiaomi news archive on mi.com/global/news or the GSMArena database (for smartphones).
💡
If the serial number production date is 6+ months older than the model release date, there is a high probability that the device was in stock or was refurbished (restored).
7. Frequent Mistakes: What to Avoid
When determining the release year of Xiaomi, users often make the same mistakes.
Myths and misconceptions:
- ❌ «IMEI This is not a good time for Xiaomi — IMEI Encode only information about the model and country.
- ❌ «Date on the box = Production date: the box shows the date of packaging, which may be 1-6 months later.
- ❌ «All devices of the same model are released in one year: production can take 12-18 months (for example, Redmi Note 9 was produced from 2020 to 2021).
- ❌ «The newer the firmware, the newer the device: the firmware can be updated on the old phone, and the date of assembly of the software is not equal to the date of production.
How not to run into a fake:
- 🔍 Check the serial number on the device and the box – they must match.
- 🛠️ Check build quality: the original Xiaomi no backlashes, gaps or curved labels.
- 💰 If the price is 30-50% lower than the market, and the seller assures that the device is “new, but without a box” – this is a reason to doubt the market.