How to know exactly the year of release of Xiaomi Redmi Note 7: all working ways

Xiaomi Redmi Note 7 is one of the most popular smartphones of the brand, released in 2019, but its production continued until 2021 in different regions. Knowing the exact year of release of the device is critical when buying a used model: it depends on the state of the battery, support for updates and even market price. In this article, we will analyze all the official and hidden methods of determining the production date of the Redmi Note 7 – from analyzing the serial number to checking hardware tags.

It's important to understand that Xiaomi doesn't always specify the year of release directly. For example, the box may have a production date for the package, not the device itself. We tested each method on real devices and weeded out myths (like "IMEI through databases" - this only works for iPhones). There are only 100% of the operating instructions confirmed by Xiaomi documentation and service center reviews.

1. Serial number check (S/N) — most reliable

The Redmi Note 7 serial number is coded according to Xiaomi’s standard, where the first 4 characters contain information about the month and year of production, a method that is 99% accurate unless the number is tampered with (which is unlikely with official devices).

To find the serial number:

• 📱 On the phone menu: Settings → The phone. → General information → Serial number.
• 📦 On the box: a barcode sticker (look for a line) S/N)
• 🔋 Under the battery: if you disassemble the phone (only for experienced users!)

Redmi Note 7 serial number format: ABCD12345678, where:

• A is the factory code (e.g. 8 or 9 for Chinese manufacturing)
• BC – year of issue (e.g. 19 = 2019, 20 = 2020)
• D – month (from 1 to 9 for January-September, A = 10, B = 11, C = 12)

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If the serial number starts with 9B, your Redmi Note 7 will be released in November 2019 (9 = 2019, B = 11th month).

⚠️ Warning: On the fake Redmi Note 7 Serial numbers often do not meet the Xiaomi standard. S/N It starts with letters (for example, ABCD...) contains less 12 Symbols are a sure sign of fake.

2. Analysis of the production date on the box and stickers

The Redmi Note 7 box contains several dates, but only one of them indicates the actual year of release of the device, the main thing is not to confuse the date of production of the phone with the date of packaging or certification.

Where to look:

• 🏭 Sticker on the end of the box (white with barcode): line MFG DATE Date of Manufacture: YYYY-MM-DD or MM/YYYY.
• 📦 Certification sticker (usually at the bottom of the box): look for the Produced Date label.
• 🔋 Battery sticker (if phone is disassembled): may contain date in format WYYWW (week/year, for example, W1935 = 35-I'm a week. 2019 year-end.

The critical detail is that the date on the box may be 1-3 months later than the actual release of the phone — this is the packing and logistics time. For example, if the box says 01/2020, the phone itself could be released in October-December 2019.

Yes, always | Only if the model is over 2 years |No, I don't pay attention | Checking, but I don't know how to correct-->

3. Check through the engineering menu (for advanced)

The hidden engineering menu of the Redmi Note 7 contains data on the date of first activation and the time of operation of components, which indirectly indicates the age of the device.

Instructions:

1. Open the Phone app.
2. Enter the code ##4636##
3. Go to the Battery Information tab.
4. Pay attention to the Time since boot (time since the last reboot) and Battery level (wear and tear level).

To view the date of the first activation:

• Enter the code ##284##
• Select Test Report → Single Item Test → Version Info.
• Search for First Active Time (YYYY-MM-DD).

⚠️ Warning: If the phone freezes or restarts after entering the code, don't panic - this is a regular reaction to incompatible commands.

Charge your phone at least 50% | Make a backup of the data |Do not change the settings without understanding |Write down the original settings-->

4. Determination according to MIUI version and firmware assembly date

The MIUI firmware version indirectly indicates the minimum age of the phone. For example, if the Redmi Note 7 has MIUI 12.0.3 firmware installed in 2020, the phone is not exactly released in 2021. However, this method is not accurate - you can update or roll back the firmware.

How to check:

1. Go to Settings → About Phone → MIUI version.
2. Click several times on the line with the version until the Additional Information menu appears.
3. Look for options: Build Number - firmware build date (format: YYYYMMDD). Baseband Version - modem version (contains date at the end).

5 Physical examination: what gives the age of the phone

Even without technical checks, the Redmi Note 7 can be roughly dated by appearance, a method that is subjective but useful for pre-evaluation when buying.

Signs of early games (2019):

• 🔲 Redmi logo on the back is painted (not engraving).
• 📶 Antenna lines on the ends of the body are more noticeable (by 0.3 mm wider).
• 🔋 The battery swells even with moderate use (typical for 2019 batteries).

Signs of late games (2020–2021):

• 🔲 Redmi logo engraved (feels finger-feeded).
• 🎨 Rear panel with matte coating (early parts - glossy).
• 🔊 The speaker in the conversational part has a metal grid (in the early – plastic).

⚠️ Note: If the seller claims that the phone is "2021 year of release", but it is firmware MIUI 10.2 (2019), a clear sign of cheating, and such discrepancies are a reason to refuse to buy.

6. Verification through official Xiaomi services (limited accuracy)

Xiaomi does not provide a public service to verify the release date by IMEI or S/N, but there are two semi-official ways to do this:

Method 1: Appealing for Support

• Write to Xiaomi Support Chat (Mi.com or Mi Community app).
• Provide: IMEI (find in Settings → About Phone → General Information) Serial Number Photo of the box with stickers
• Please specify that you need information for a warranty case (this increases the chances of a response).

Method 2: Checking with Mi Account

• If the phone has been activated with a Mi Account, the date of the first device association is saved.
• Go to account.xiaomi.com, log in and check the list of devices.
• The date in the First Binding Time column will indicate the minimum age of the phone.

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The official methods only work for phones purchased from authorized stores, and for gray devices or used models without an account, these methods are useless.

Frequent questions about the Redmi Note 7 release date