How to find out the release date of Xiaomi Redmi Note 8: all ways with explanations

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

When you buy a Xiaomi Redmi Note 8 — especially from hand or in unofficial stores — the release date of the device can tell more than the seller, which depends not only on the residual battery life, but also the warranty period, as well as the likelihood of hidden defects. For example, the first batch models often suffer from “childhood diseases” of firmware or hardware defects that are later fixed.

What’s more, the Redmi Note 8 was released from 2019 to 2021 in various versions (3/32 GB, 4/64 GB, 6/128 GB), and the production date can tell you which version is in front of you. This is critical if you plan to update the firmware: older devices may not support the latest versions of MIUI due to hardware limitations. In this article, we will discuss all the official and non-obvious ways to check the release date, including those that work even without a box.

Method 1: Serial number (IMEI or S/N)

The most reliable method is to decipher the serial number or IMEI. Xiaomi Redmi Note 8 Production date is encoded in the first digits S/N (on a box or in the phone settings. Code format: YYWW, where:

• 📅 YY — last two digits of the year, for example, 19 = 2019, 20 = 2020).
• 📆 WW — week of the year (01 to 52).

Where to find S/N:

1. On the box – usually on a barcode sticker (look for S/N or Serial No.).
2. In phone: Settings → About phone → General information → Serial number.
3. By code: type *#06#, and IMEI will be displayed, and under it can be S/N.

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If the serial number starts with letters (e.g. MZB), ignore them – the date is encoded in the first 4 digits after the prefix.

An example of decryption:

• Serial number: MZB9C1935123456 → 1935 → 2019, 35th week (late August 2019).
• Serial number: 200812345678 → 2008 → 2020, 8th week (February 2020).

Method 2: According to MIUI (Hidden Menu)

If there is no box and the serial number is not readable, you can try to find the date in the MIUI service menu.

1. Open the phone app and dial the combination: ##4636##.
2. In the menu that appears, select Phone Information.
3. Scroll down to the Build Date block.

Date format: YYYYMMDD (e.g. 20191015 = October 15, 2019) Note that this is the firmware build date, not the device production date, but usually they differ by no more than 1-2 months.

Make sure your phone is 50%+ charged.

Use the standard "Phone" application (non-third-party calls)

If the combination doesn't work, try ##284## or #6484##.

Take a picture or take a picture before leaving the menu.-->

⚠️ Note: On custom firmware (e.g. LineageOS or Pixel Experience), the build date may indicate the version of the software, not the age of the device.

Method 3: By sticker under the battery (disassembly)

On the inside of the Redmi Note 8 (under the removable lid, if any, or under the battery), a production date sticker is often glued, which requires disassembly, so it's only suitable if you already own the phone or buy it from hand and can inspect it.

How to find it:

1. Turn off the phone and remove the tray for SIM-map.
2. Carefully tuck the back cover (if it is non-glue) or remove it with a suction cup and plastic mediator.
3. Under the battery or on the inside of the case, look for a white sticker with QR-The date is usually given in the format YYYY-MM-DD or YYMMDD.

Example of sticker:

XIAOMI INC.




MODEL: M1908C3JG




DATE: 2019.11.05




MADE IN INDIA

⚠️ Warning: Disassembling the phone will void the warranty if the seals are broken. For models with adhesive cover (for example, the global version), it is better to use other methods.

Yeah, I did)|Yeah, but through the workshop.|No, I'm afraid to hurt you.|No, there was no need.-->

Method 4: According to Mi Account (official method)

If the phone is linked to a Mi Account, the production date can be found through Xiaomi’s official website, which only works for devices registered in the system:

1. Go to the Mi Account page and log in.
2. In the Devices section, select your Redmi Note 8.
3. Scroll down to the Device Information block – it may include an Activation Date or Production Date.

If there is no date, try:

• 📧 Write in support of Xiaomi with a request to provide data (need to provide information) IMEI check).
• 🛒 Check your order history if you bought from Mi Store or official partners.

Note: The activation date (first on) may differ from the production date by several months – this is normal for devices that were in stock.

Method 5: By external signs (for experienced)

If no digital method has worked, you can try to determine the age of the Redmi Note 8 by external signs, which is subjective, but sometimes works:

Also, pay attention to the state of the battery:

• 🔋 If the phone is less than 60% of the charge (e.g., 2,500 mAh instead of 4,000 mAh), it is likely to be over 2-3 years old.
• 🔌 When connected to charging, early models may not support Fast Charging on non-original units.

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The most accurate way is to combine the serial number and the data from MIUI. If they match, trust them.

Frequent Mistakes and How to Avoid Them

When determining the release date of the Redmi Note 8, users often encounter false positives.

1. Confusing firmware and production date: The service menu (#4636###) may display the MIUI build date, not the device. Always check it against the serial number.
2. Use IMEI instead of S/N: in IMEI date is not encoded - you need the first 4 digits of the serial number (after the letter prefix).
3. AliExpress/Amazon data is trusted: marketplaces often indicate the date of shipment rather than production. The real age can be 6-12 months longer.

To avoid mistakes:

• 🔍 Always check the data in at least two ways (e.g. serial number). + battery-sticker).
• 📦 If you buy from hand, demand a photo of the box, stickers with IMEI and the "On the phone" menu".
• 🛠️ For accurate diagnosis, use applications such as CPU-Z or AIDA64 — They show the date of production of certain components (e.g., a battery).

FAQ: Answers to popular questions