How to know exactly the year of release of Xiaomi Redmi Note 3: from serial number to hidden menus

Xiaomi Redmi Note 3 is still popular even years after its release — its reliability, removable battery and upgradeability attract users. But when buying a used device or assessing the condition of your gadget, it is critical to know its real age. The year of release affects battery wear, compatibility with new firmware and even market value.

The problem is that the date of production is rarely listed in the phone’s settings, and the manufacturer doesn’t display it on the home screen, and aftermarket sellers often hide or distort this information. In this article, we will discuss 5 working methods – from analyzing the serial number to checking through the engineering menu – that will help determine the year of release of Redmi Note 3 (including Pro versions, Prime versions, MTK qualcomm).

We'll focus on the difference between the date of production and the date of activation, which is confusing many of these concepts, which leads to errors in assessing wear and tear, and you'll learn how to recognize a fake by discrepancies in dates and where to look for hidden labels on the case.

1. Serial number check (IMEI/SN) — most accurate

Serial number (SN) and IMEI — These are unique identifiers that the factory puts into the phone when it's built, and they encode the model, the country of production, and, more importantly, the date of release. XXXXXXXXXYYWW, where:

• 🔢 YY — last two digits of the year, for example, 15 = 2015, 16 = 2016).
• 📅 WW — week of the year (01 to 52).

To find the serial number:

1. Go to Settings → About the phone → General information.
2. Scroll down to the Serial Number and IMEI.
3. Write down the last ones. 4 figure SN (for example, 1608 = 8-I'm a week. 2016 year-end).

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If the serial number is erased or not readable, look it up on the sticker under the removable lid (near the battery) or on the box (under the barcode).

For Redmi Note 3, the following date ranges are relevant:

⚠️ Warning: If the last 4 digits of the serial number are 0000 or repeating (1111, 2222), this is a sign of a fake or overstuffed phone.

2.Analysis of the box and stickers - visual date markers

The original Xiaomi Redmi Note 3 package contains several labels that can tell you the year of release, and the main thing is to find a barcode sticker at the bottom of the box.

• 📦 Made in China – a mandatory inscription for official devices.
• 📅 Date of Manufacture – Production Date in the Format YYYY-MM-DD (less MM/YYYY).
• 🔍 SN/IMEI — Data from the phone is duplicated (see section) 1).

If there is no box, check the phone itself.

• 🔋 Under the removable cover (on or under the battery) there must be a sticker with the serial number and date in the format WYY (for example, 0816 = August 2016).
• 🛠️ On some batches of Redmi Note 3 Pro under the tray SIM-The card is engraving with month and year (for example, the map is engraving, MAR 2016).

Compare your box to the original Redmi Note 3 package (2015–2016):

⚠️ Note: If the box is a year later than 2016 and the phone is serial number 2015-2016, it may be a reseller-packaged device).

3. Check through the engineering menu (#4636##)

Xiaomi’s hidden engineering menu contains the first activation and update time, which indirectly indicates the age of the device.

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Go to the tab Information about the phone.

Look for the following parameters:

• 📱 Uptime: This shows how many hours the phone has been turned on, if the value exceeds 50,000 hours (~5.7 years old, device exactly older than 2017.
• 🔄 Date of last reset – if the reset was done recently, it may mask the real age.
• 📡 Database information – some firmware displays the date of the first registration in the network (First Boot Time option).

Uptime (working time)|Date of last update MIUI|First Boot Time (if any)|Conformity IMEI menu-box-->

For Redmi Note 3 with Qualcomm processor, additional code is available:

##225##

It displays battery calibration information, which sometimes indicates the date of the first charging cycle (example: Calibration Date: 2016-03-15).

⚠️ Note: If the menu doesn't open after you enter the code, you have custom firmware on your phone (like LineageOS) that blocks engineering commands.

4. Verification through MIUI and update history

Official firmware MIUI They contain date stamps that help you estimate the age of the device, for example, if the phone has never been updated, the current firmware version matches the one that was relevant at the time of release.

How to check:

1. Go to Settings → About the phone → System update.
2. Click on the icon. ⚙️ (settings) in the upper corner.
3. Select the Update Log.

Pay attention to:

• 📅 First Update Date – If it’s 2017, the phone is definitely not new.
• 🔢 Version. MIUI — for example, MIUI 7 was put on the Redmi Note 3 from the factory in 2015-2016, and MIUI 8 came later.
• 🔄 Number of updates – if there are more than 20, the device is at least 3-4 years old.

For accuracy, check the version matching table MIUI release dates:

If the update log is empty, it could mean:

• 🔧 The phone was reset to factory settings (see section 5).
• 🛠️ There is a custom firmware (for example, Pixel Experience), which erases history.
• 🚫 Device locked (Mi Account not tied).

5.Date of first activation and binding to the Mi Account

Xiaomi’s account records the date of the phone’s first tether, which helps determine its age, and this method works even if the device has been reset.

Instructions:

1. Go to Settings. → Mi Account.
2. Click on the profile avatar → Account management.
3. Scroll to the Devices section and select your Redmi Note 3.

Look for the Addition Date or First Connection field, for example, if it says 12.05.2016, the phone is released no later than April 2016 (including delivery and sale times).

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If your phone is not tied to your account, try logging in via Settings. → Additionally. → For developers → Mi Account status. This can display the date of the last authorization.

Pay attention to the nuances:

• 🔄 If the binding date is significantly later than the production date (e.g., a 2015 phone and an account tied in 2018), this could mean that the link is not a date of production:
• 📱 If the Redmi Note 3 account is not listed, then:

⚠️ Attention: The activation date of the Mi Account is not the same as the date of production of the phone! The difference can be from 1 month (storage) to 1-2 years (resellers, repair devices.

Physical examination: wear and indirect signs of age

Even without technical data, you can roughly determine the age of the Redmi Note 3 by external signs.

Battery:

• 🔋 If the phone holds a charge of less than 4-5 hours with moderate use, the battery is more than 3 years old.
• 🔌 Inflated battery (the cover does not fit tightly) - a sign of age 4+ year-end.

Body and display:

• 📱 Yellow screen – typical for devices 2015-2016 (burnout matrix).
• 🔧 Erased buttons (especially the power button) - indicates active use 2+ year-end.
• 🛠️ Autopsy marks (scratches on screws under the lid) - replacement of components is possible.

Firmware and productivity:

• 🐢 Phone brakes on standard tasks (scrolling, camera start) - a sign of wear and tear of flash memory (typical for devices older than 4 years).
• 🔄 New versions are not supported MIUI (for example, MIUI 12+) — model.

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If the phone has factory stickers (for example, on the camera or under the lid), and the serial number corresponds to 2015-2016, it is almost guaranteed the original device without major repairs.

For a more accurate assessment, use a combination of methods.

1. Check the serial number (section 1) → You will receive the date of production.
2. Check the date of first activation (Section 5) → You will know how long the phone was in storage.
3. Examine the physical condition. → Evaluate the intensity of use.

7. Online services for verification: pros and cons

There are several online tools that promise to determine the release date by IMEI But their reliability varies:

Official services:

• 🌐 Mi Verify – checks the originality of the device, but does not always show the date.
• 🔍 IIMEI.info – defines the model and year IMEI, But for the Redmi Note 3, the data may be inaccurate.

Third-party services (use with caution!):

• 📊 SNDeeP – Decrypts the serial number, but does not support all Xiaomi batches.
• 🔧 IMEI24 — It shows the activation date. IMEI on the network, but only if the phone is connected to the mobile operator.

Warnings when using online services:

• ❌ Don't enter. IMEI on dubious sites – this can lead to data leakage.
• ⚠️ Services often confuse Redmi Note 3 with Redmi Note 3 Pro or other models.
• 🔄 The date data may be updated with a delay (for example, if the phone has not been used for a long time).

Example of the report from IIMEI.info for Redmi Note 3:

Model: Xiaomi Redmi Note 3 (Qualcomm)




Manufacture Date: 2016-02 (Week 8)




Carrier: Unlocked




Status: Clean (Not blacklisted)

FAQ: Frequent questions about the Redmi Note release date 3