Xiaomi Redmi Note 8 Pro is one of the most popular smartphones of the brand, released in 2019, but sold in different regions until 2021. Due to the long life cycle of the model, there are devices on the market with a difference in production date up to 2 years. Why is this important? The year of release depends on the battery status, version of preinstalled software, and sometimes equipment (for example, the presence of an 18-wattt charger in early batches). In this article, we will discuss all the working methods of determining the exact age of your Redmi Note 8 Pro – from analyzing the serial number to hidden system menus.
Many users mistakenly assume that the date on the box or in the phone settings reflects the actual year of release, in practice, the manufacturer indicates the date of certification or the first sale of the lot, rather than the assembly of a particular device, and we will show you how to get around this nuance and get reliable information - even if you do not have the original packaging.
1. Serial number check (S/N) — most accurate
The Redmi Note 8 Pro serial number encodes the production date in YYMMDD format, where:
- 📅 YY — last two digits of the year, for example, 19 = 2019, 20 = 2020)
- 🗓️ MM — month (01 to 12)
- 🕒 DD — month-day
Where to find the serial number:
- On the sticker under the removable lid (near the SIM-tray).
- In the Settings menu → About the phone → General information.
- The original box (if saved).
Decryption example: serial number MZB96191015XXXX means that the phone was assembled on October 15, 2019.Please note: the first 6 characters (MZB96) is the model code, and the date begins with the 7th character.
⚠️ Note: Fake Redmi Note 8 Pro serial numbers are often forged.If the date on the sticker and settings do not match, check the phone through the official service Xiaomi.
2.IMEI Analysis: What You Can Learn About Release Date
IMEI (International Mobile Equipment Identity is a unique phone identifier that also contains batch information. For the Redmi Note 8 Pro, the date is encoded in the first 8 digits (TAC-You can decrypt it like this:
- Find out IMEI: Dial *#06# and the window will appear. Look at Settings → Phone → General information. On the sticker under the battery (if you removed the lid).
IMEI.info
"Approved Date"
Example: If the IMEI starts with 86952904, the service can show the June 2019 date, which means that the phone is released no earlier than July 2019, but the exact date cannot be determined - only the range.
| First 8 digits of IMEI | Approximate release date | First-sales region |
|---|---|---|
| 86952904 | July-September 2019 | China/India |
| 86953001 | October-December 2019 | Global market |
| 86953102 | January-March 2020 | Europe/Russia |
| 86953201 | April-June 2020 | Latin America |
Important: IMEI shows the date of the batch certification, not the build of a particular phone. The difference can be as much as 6 months! For accuracy, use this method along with checking the serial number.
3.Date on box and stickers: where to look and what to believe
The original Redmi Note 8 Pro box contains several dates, but only one of them is close to the real year of release:
- 📦 Date on side sticker (format) YYYY-MM-DD) — This is the date of manufacture of the package, not the phone. It's usually 1-4 months before the actual assembly.
- 🏭 A barcode with a letter before the numbers (e.g, L9A2005): L is the factory code (e.g. L) = India, C = China). 9A — year (9 = 2019, A = January).
- 📄 Warranty card – the date is set by the seller, not the factory!
Example: If the box says 2019-08-15 and the barcode starts with L9C (9 = 2019, C = March), the phone is likely assembled in April-May 2019.
⚠️ Note: Fake boxes often duplicate dates with official Xiaomi photos. 2019-09-01 On all the boxes in the store, it is a reason to doubt the originality.
Compare the serial number on the box and phone|Check the barcode for the presence of a letter prefix|Evaluate the quality of the print (blurred dates are a sign of forgery)|Find the Xiaomi hologram on the sticker-->
4. Hidden system menus: engineering codes for age determination
The Redmi Note 8 Pro has hidden menus where you can find the time of first activation and updates, which indirectly indicates the age of the device:
- Test Menu: Enter in dial: ##4636## Go to the Battery Information tab Find the "Last Charging Time" field - if it is more than 2 years, the phone is released until 2021.
- First Enabled Date: Enter ##284## Select "Logger" Scroll to the "First Boot Time" block, where the date of first activation is indicated.
- Loader Version: Enter ##7594## If the bootloader version is older than 2020, the phone is not released until mid-2019.
Method limitation: This data is reset after a full reset is completed, and if the phone is recovered, the information will be unreliable.
What to do if the engineering codes don’t work?
5. Software Methods: Applications and Online Services
If there are no physical tags or they are erased, specialized utilities will help.
- 📱 CPU-Z (Free, Google Play: Shows the firmware build date in the System section → Build Date: This is the compilation date, not the phone’s production date (up to 6 months difference).
- 🌐 MIUI Version Checker (official website): Enter the model and region – the service will show the date of the last stable firmware for your batch.
- 🔍 AIDA64 (Paid version: In the System section → The build date displays the exact firmware date, which helps estimate the minimum age of the device.
Example from CPU-Z: if Build Date indicates Fri Oct 11 2019, the phone is released no earlier than November 2019 (firmware is compiled 1-2 months before the start of sales of the batch).
💡
Compare the firmware date from CPU-Z to the current version of MIUI in settings. If the difference is more than 1 year, the phone probably hasn't been updated for a long time - this indirectly confirms its age.
6.Physical Signs: How the Age of a Phone Affects Its Condition
Even without documents and codes, you can roughly determine the age of the Redmi Note 8 Pro by external signs.
- 🔋 Battery: If the capacity in Settings → The battery is less than 4000 mAh (originally 4500 mAh), the phone has been in use for at least 1.5-2 years. Bloating the back cover near the camera is a sign of a battery older than 2 years.
- 📱 Case: Yellowing plastic around connectors — the phone is released before 2020 (early batches used less resistant plastic). SIM-tray (e.g., Nano symbols) SIM) — active use of 1.5+ year-end.
- 🔊 Speakers: Muffled sound at maximum volume - speaker membranes wear out after 2 years of operation.
For accurate battery diagnosis, use the AccuBattery app (Google Play). If your battery health score is below 80%, your phone will likely be released before 2020.
💡
Combination of erased markings on SIM-A tray, bloated battery and yellowed plastic with a 90% probability points to a 2019 phone release.
7. Check through official Xiaomi services
Xiaomi provides two official methods of authenticating and ageing devices:
- Authentication service (mi.com/global/verify): Enter IMEI or serial number. The system will show the date of first activation (not to be confused with the date of production!). If the phone is not activated, the service will return the error, which means that the device is new (or fake).
Guarantee status
warranty
- Enter IMEI and serial number required.
- Shows the date of the start of the warranty period (usually coincides with the date of sale).
- If the warranty expires, the phone was released at least 1.5-2 years ago.
Restrictions on official services:
- Do not work with phones purchased in unofficial stores (for example, on AliExpress without Xiaomi certification).
- For the Chinese version (Redmi Note 8 Pro China) use mi.com/cn.