How old is Xiaomi phone – how to find out the release date more accurately than in the box

Why it is important to know the real age of Xiaomi smartphone

You bought a Xiaomi off the shelf or even a new one in the store, but you doubt the seller's honesty? The age of the smartphone directly affects its residual battery life, the likelihood of breakdowns and even the cost of resale. For example, a 2020 phone with an 80 percent battery already loses up to 30 percent of the market price compared to a similar model that rolled off the assembly line a year later.

Manufacturers (including Xiaomi, Redmi, and POCO) often mask the production date with a “warranty period” or repackage warehouse remnants. And aftermarket scammers can re-fish devices by resetting their time counters. In this article, the only current way to verify the release date through hidden system data that works even after resetting to factory settings.

Method 1: IMEI Testing is the Most Reliable Method

Code. IMEI (International Mobile Equipment Identity is your Xiaomi’s unique 15-digit ID, which is tied to a production date. It can’t be faked without physical interference with the hardware. IMEI:

• 📱 Type on the phone keyboard *#06# - the code will be displayed automatically.
• 📄 Look at the sticker under the battery (for models with a removable back cover) or on the box.
• 🖥️ In settings: About the phone → General information → IMEI.

Next, decode the IMEI through specialized services.

• 🌐 IMEI.info – shows the date of production, model and country of manufacture.
• 🔍 IMEI24 — Provides a detailed report with activation history (paid).

💡

If the service shows the date of activation, not production - take 1-3 months. Xiaomi often lies in warehouses before the first sale.

⚠️ Attention: If the date IMEI If the device is at odds with the phone settings for more than 6 months, there is a high risk that the device will be:

• 🔄 It was in repair with a replacement motherboard (IMEI bound).
• 📦 Is a "gray" import with a fake box.
• 🔧 It has an unoriginal firmware (check through Settings). → The phone. → Version. MIUI).

Method 2: Serial number - where to find it and how to decrypt it

The serial number (S/N) of Xiaomi encodes the production date in the first 4-6 characters.

Where to see the serial number:

1. In settings: About the phone → General information → Serial number.
2. On the box (under the barcode or on the sticker with IMEI).
3. Under the battery (for models with a removable cover, for example, Redmi 4X or Mi A1).

🔍 Example of decryption: Serial number 22D5ABC123 signifier:

• 22 to 2022.
• D is the 4th month (A = 1, B = 2,..., L = 12).
• Week 5 to week 5 of the month.

That is, the phone was released in the 4th week of April 2022.

Method 3: System information through engineering menu

If there's no box, and IMEI and serial number are in doubt, use hidden system data, which works even on custom firmware phones.

Instructions for Xiaomi/Redmi/POCO:

1. Open the Phone app and dial ##4636##.
2. Select the item Phone Information.
3. Scroll down to the Uptime block.

This shows the total time the device has been active since it first turned on, for example, if you see 125 days 4 hours and the seller claims that the phone was on the shelf, that's a clear hoax. Compare this value to the activation date by IMEI.

⚠️ Note: On some models (e.g, POCO F3 Or Redmi Note 10 Pro, the engineering menu can be blocked, in which case use an alternative code:

adb shell dumpsys battery

Find the line in the conclusion first_level_timestamp — This is the time of first battery charge (approximate start date of use).

Method 4: Battery data is an indirect indication of age

Xiaomi battery loses capacity even when it's off. Statistically, lithium-ion batteries degrade to a lower capacity. 2-5% Monthly storage without recharging:

1. Install the AccuBattery app.
2. Charge your phone to 100% and wait until it is completely discharged (until it is automatically turned off).
3. In the Health section, look at the Calculated Capacity parameter.

🔋 Important: If the capacity is below 80% and the seller claims that the phone is new, you are either cheating or the device was stored in abnormal conditions (for example, at high temperature).

Method 5: Checking through official Xiaomi services

Xiaomi provides two official tools for authenticating and ageing devices:

1. Warranty Checking Site: Go to new.c.mi.com/global/verify. Enter IMEI or serial number. The system will show the warranty activation date (usually the same as the first sale date).
2. Mi Verify app (China only): Download APK From the official website. QR-code on the box or enter S/N. Get a report with the date of production and history of repairs (if you have been there).

⚠️ Note: Xiaomi’s official services may not work for:

• 🌍 Models sold outside of China/India (e.g. global versions of Redmi Note 12).
• 🔧 Phones after replacement of motherboard (IMEI change).
• 📦 Devices purchased from unofficial resellers (data does not fall into the Xiaomi database).

💡

If the official service shows "Device not found," it doesn't always mean a fake, it may be that the phone is destined for another region or has been restored by the manufacturer.

What to do if the data is conflicting?

If different methods give different results (for example, IMEI shows 2021 and serial number - 2022), follow this algorithm:

1. Compare it to a box: The date on the sticker must match the serial number. Disparities over 3 months are a sign of forgery.
2. Check the activation history: Services like SNDeeper show all associated IMEI SIM-cards (paid).
3. Evaluate your physical condition: 🔍 Look at the wear of the buttons (especially the Power and Volume). 📸 Check the camera for scratches (glass will dim over time). 🔋 Check the oxidation charger connector.

📌 Critical Signs of Deception:

• 🚨 The serial number on the box and in the settings do not match.
• 🚨 IMEI begins with 00 or contains repeating digits (e.g. 11111111111111111111).
• 🚨 In the engineering menu, the working time exceeds 5000 hours (~7 months) and the seller claims that the phone is new.

FAQ: Frequent questions about age check Xiaomi