Xiaomi 8T How to determine the age of the smartphone and avoid counterfeiting

Xiaomi 8T — One of the brand's most popular smartphones, released as part of the Mi 8 series, but many users still confuse it with other models or do not know how to accurately determine the year of production. The release date depends on the battery status, support for updates and even the market price.

In this article, we will analyze not only the official release year of Xiaomi. 8T, But we can also test the exact date of production of a particular instance by serial number, and learn how to tell the difference between the original and the fake, which firmware versions are relevant for the 2018-2019 model, and why some vendors deliberately hide the real age of the device. We will also analyze whether to buy this smartphone in 2026, taking into account its technical characteristics and alternatives from Xiaomi.

Official year of Xiaomi release 8T: What the manufacturer says

Xiaomi Smartphone 8T It was announced on September 26, 2018 at a special event in Hong Kong, and sales began in October of the same year, with the model first appearing in the Chinese market, and then in the global version (with support for Google Play and multilingual interface). This is important to consider, since the production date of a particular device may differ from the announcement date by 1-3 months.

Interesting fact: 8T It was the successor to the Xiaomi Mi 8, but with a more affordable price and some simplifications in hardware, for example, it used a Snapdragon 845 processor (as in the flagship), but the screen received a cut-out drop instead of a mechanical slider for the front camera. These changes have reduced costs without significant productivity losses.

• 📅 Date of announcement: 26.09.2018
• 🛒 Start of sales: October 2018 (China), November 2018 (global market)
• 🔄 Last update MIUI: MIUI 12.5 (based on Android 10)
• ⚠️ End of support: 2021 (no more official security updates)

It is important to understand that Xiaomi 8T The Mi 8 Pro came out later (November 2018) and had a screen with a fingerprint under the display, as well as an improved camera. The confusion between these devices often arises with sellers in the secondary market.

How to find out the exact year of production of your Xiaomi 8T

Even if the smartphone was released in 2018, a particular device could roll off the assembly line later, up to 2019. This is normal practice for Xiaomi, which continues to release batches of popular models after the official announcement. To find out the exact date of production of your instance, use one of three methods:

Method 1: Serial number (IMEI or SN)

Serial number (SN) or IMEI They contain coded release date information:

1. Go to Settings → About the phone → General information.
2. Scroll to the blocks IMEI or serial number.
3. Copy the value (or write it down).

Next, decipher the date by algorithm:

• 🔢 First 4 digits IMEI — This is the manufacturer code (generally 86 or 89 for Xiaomi).
• 📅 The following: 2 Numbers – year of production, for example, 18 = 2018, 19 = 2019).
• 📆 2 more digits - month (01 to 12).

Method 2: Through the Menu of the Engineering Test

This method is suitable for advanced users:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Go to the tab Information about the phone.
4. Find the line Assembly date (for example, 20190315 = 15 March 2019).

⚠️ Note: Not all firmware displays the build date correctly. If you see a value like 20181001 but you bought the phone in 2019, it's probably the compilation date, not the iron production date.

Method 3: By box and stickers

Original Xiaomi Packaging 8T contain:

• 📦 Barcode with production date (format) YYMM — year).
• 🏭 Sticker on the back (under the battery) with serial number.
• 🔖 Hologram with the logo of Xiaomi (on the boxes of 2018 it is blue, for 2019 – silver).

If there is no box, check the sticker under the lid of the phone (you have to remove the case), which usually shows Made in China and the date in the format. YYYY-MM-DD.

Table: Differences Xiaomi 8T year-by-year

All Xiaomis, though. 8T The devices of different batches may have nuances in the configuration and hardware:

Note that 2019 devices often have a more worn-out battery, even if they were in storage, because lithium-ion batteries degrade over time, even without active use. Check the battery status through the AccuBattery app or in the engineering menu (#4636## → Battery information).

Why it is important to know the year of release when buying a used Xiaomi 8T

In the secondary market Xiaomi 8T It is often sold at prices between 8,000 and 15,000 rubles (2026), but the cost should depend not only on the external condition, but also on the real age of the device:

• 🔋 Battery: Capacity drops 15-20% a year, 2018 device will remain by 2026 ~60% of the original 3300 mAh.
• 🔄 Updates: Xiaomi has stopped supporting 8T after MIUI 12.5 (Android 10) 2019 devices could get more security patches.
• 💰 Price: For 8T 2018 is asked for the same money as 2019, although the latter is technically younger".
• 🛠️ Repair: Early batch parts are harder to find (e.g. original droplet displays).

⚠️ Note: Sellers on Avito or Yule often list “state as new” in their description, but don’t write the year of release.This can be a ploy to sell the 2018 device for the price of 2019. Always require a photo of the serial number or box!

How to check the honesty of the seller:

1. Ask for a photo of the sticker under the battery (with a date).
2. Please check the version of the firmware (Settings) → About phone → MIUI version).
3. Run the battery test via AccuBattery (should show) >80% Health for a 2019 Device).

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If the seller refuses to provide a serial number or a photo of the box, they are likely hiding the real age of the phone, in which case it is better to abandon the deal or reduce the price by 20-30%.

Xiaomi Alternatives 8T In 2026: Is it worth buying?

Despite Xiaomi's 8T It was the top device in 2018-2019, and in 2026, its performance looks modest:

If you need a smartphone solely for calls, social networks and light games (for example, Brawl Stars or the Internet). PUBG Mobile on medium settings, then Xiaomi 8T But for modern tasks (video shooting in the video) 4K, Multitasking, heavy games: it is better to consider models no older than 2021.

Benefits of buying 8T 2026:

• ✅ Low price (from 8,000) ₽).
• ✅ Simple repairs (many parts and craftsmen).
• ✅ Snapdragon 845 is still more powerful than many budget chips of 2023.

Disadvantages:

• ❌ No security updates (risks of vulnerabilities).
• ❌ Weak battery (replacement required for 2,000–3,000) ₽).
• ❌ No. 5G, weak NFC (Not all payment terminals are supported).

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Xiaomi 8T In 2026, it is suitable only for secondary tasks or as a spare phone. For everyday use, it is better to choose the model 2021-2022 with support for updates.

Frequent problems Xiaomi 8T: point out

The 2018-2019 devices have typical “diseases” that you should know about before buying:

1. Fast battery discharge

Even with careful use, the battery capacity drops to 70-75% in 3-4 years.

• 🔌 The phone is discharged in 3-4 hours with active use.
• 🔥 Heated when charging (the risk of battery bloating).
• ⚡ Charging jumps (for example, from 30% immediately to 50%).

Solution: Battery replacement (original cost) ~2 500 ₽, analogue from 1,200 ₽).

2. Screen problems

Early instalments 8T They used yellow spot displays at low brightness:

• 🖥️ Broken pixels (dots that do not change color).
• 🔍 Blurring at the edges (bad glue) OCA-glass).
• 💥 Cracks from impacts (glass Gorilla Glass 5 does not save from heavy falls).

3. Processor overheating

The Snapdragon 845 is warmed by prolonged loads (games, video editing). In the devices of 2019, the heat sink has improved slightly, but the problem remains.

• 🌡️ Temperature above 45°C in games.
• 🐢 Slowdown (trottling).
• 🔄 Self-involved reboots.

Solution: replacement of the thermopaste (worth it) ~1 000 ₽ service).

⚠️ Warning: If the seller says the phone has never warmed, but refuses to show the test results in the AIDA64 or CPU Throttling Test is a reason to doubt the integrity. Normal temperature of the Snapdragon 845 under load is 60-70°C.

FAQ: Answers to Frequent Questions about Xiaomi 8T