How to check Xiaomi smartphone before buying: step-by-step instructions 2026

Why checking Xiaomi before buying is not paranoia, it’s a necessity

Xiaomi smartphones have long won the love of users due to the price-quality ratio, but their popularity has the opposite side: the market is flooded with fakes, “gray” deliveries and used devices, identifiable as new. According to the Association for Electronics Trade, up to 12% of Xiaomi smartphones in Russia are sold with inconsistencies with the declared characteristics – from replaced batteries to re-shopped Chinese versions for the European market.

Even in official stores, errors occur: for example, in 2023, the Redmi Note 12 series went on sale with defective displays (the problem of "yellow spots" at maximum brightness). And on marketplaces like Wildberries or Ozon, the risk of running into a resuscitated device after warranty repairs is up to 30%, and this article will help avoid the typical pitfalls from external inspection to inspection. IMEI and hidden functions MIUI.

We have collected unique inspection techniques that you will not find in standard instructions: how to identify a replacement motherboard, check the originality of the camera without test shots, and why even a box can tell more about a fake than the smartphone itself.

Packaging and completeness check: 5 signs of forgery

Start with the box, it’s the first filter that will filter out. 80% The original Xiaomi packaging has holographic stickers with a unique code that can be checked on the manufacturer's website. The sticker must be solid, without signs of pasting or re-adhesion. For fakes, the letters “mi” in the logo are often blurred, and the color of the box may vary. 1-2 tone (original - matte white or black, without gloss).

The kit depends on the model, but the basic set always includes:

• 📦 The smartphone itself in protective film (on the display and cameras)
• 🔌 Cable USB Type-C (post-2020 models) or Micro-USB (older lineups)
• ⚡ Charger marked Xiaomi (if stated in the specifications)
• 📄 Warranty card and instructions in the language of the region of sale
• 🔑 Paperclip for the tray SIM-cards (in 90% of models)

💡

If the kit is a cover or protective glass - this is a reason to be wary. Xiaomi's official kits never include accessories other than paper clips and documentation.

Pay special attention to the serial number on the box and under the battery (or on the tray). SIM-If the serial number on the box is erased or broken, you are either a fake or a device after warranty repair (which automatically disqualifies you from the new warranty).

2. External inspection: what gives a used or restored smartphone

So, you can pick up your smartphone and look at it in bright light.

• 🔍 Scratches and chips: even microscopic lesions on the oleophobic coating indicate use. Swipe your finger - if there are greasy marks, the coating is worn out.
• 💡 Backlight: Turn on a white background (like notes) and look at it from an angle. Yellow spots or uneven lighting are a sign of marriage or falling.
• 🖥️ Touchscreen: Test for "dead zones" in the Settings menu → Display. → Sensor test.

Check the hull for:

• 🔧 Gaps: There should be no gaps between the screen and the frame. If there are, the machine was dismantled.
• 🎨 Paint: the original Xiaomi paint is matte, no glossy areas.
• 🔊 Speakers and microphones: grids should be smooth, dentless. Blow the microphone hole - if you hear crunch, dust or moisture inside.

Pressure test: Put your smartphone down on a flat surface if it wobbles or one of the corners is raised, it's a sign of battery replacement (a new battery is often thicker than the original one). SIM-It must come in tightly, without backlash. If the tray hangs, it's replaced.

3.Verification IMEI Serial number: how to identify the "gray" import

IMEI — It's a smartphone passport that you can tell its origin from. Xiaomi has two critical features:

1. IMEI on the box and on the phone (in Settings) → The phone must match.
2. If IMEI The 86 is a Chinese version that may not support some frequencies of Russian operators.

How to check for IMEI:

1. Type *#06# on the keyboard and the IMEI window will appear.
2. Compare it to the number on the box and under the battery.
3. Check on the IMEI.info website - the system will show the model, year of release and the country of manufacture.

IMEI The box and the phone match.|

IMEI It does not start with 86 (Chinese version)|

The activation dates on the Xiaomi website and in IMEI.info are the same|

The country of origin corresponds to the region of sale-->

If the seller refuses to show IMEI before payment is 100% a sign of fraud, and you should also be wary if you IMEI starts with 00 or contains repeating digits (e.g. 123456789012345) – such number is forged.

⚠️ In 2023, there were fake Xiaomi 13 Pro, where scammers cloned IMEI To avoid this, always check the serial number on the official Xiaomi website.

4.Camera Testing: How to distinguish the original matrix from the fake

Xiaomi cameras are one of the most common targets of fraudsters, even putting fake matrices in "new" devices, passing them off as originals.

• 📸 Resolution: Take a photo and check it out EXIF-data (e.g. through an application) EXIF If the actual resolution is lower than the stated one, the matrix is fake.
• 🔦 Night shooting: Turn on Night Mode and take a picture in a dark room. Original Sony Matrix IMX (used in flagships) give a clear image even in low light.
• 🎯 Autofocus: point the camera at the text and check the focus speed. If the focus is floating, it's either marriage or a fake lens.

For advanced models (Xiaomi 13 Ultra, Mix Fold 3) do the optical stabilization test:

1. Enable video recording in 4K@60fps.
2. Move your phone from side to side.
3. If the image floats, the stabilization does not work (possibly damaged gyroscope).

💡

If the seller forbids you to take photos or record videos before you buy it, this is a sure sign that the camera is unoriginal or defective.

Also check the matrix serial number through the engineering menu:

1. Dial ##4636###.
2. Go to the camera information.
3. Compare the data with the official model specifications on the GSMArena website.

5. Diagnosis of the battery: how to find out the real wear

The battery is the most vulnerable component of a smartphone. Even if the seller claims that the phone is new, check:

• 🔋 Charging cycles: enter in the engineering menu ##4636## → Battery health should be good (good) or unknown (if new) if it's Replace soon, it'll have to be changed soon.
• ⚡ Capacity: Use AccuBattery app, if the actual capacity is less than 10% less than the declared capacity, the battery is worn out.
• 🔥 Heat: Connect the charger and play 10 minutes of heavy play (like Genshin Impact).°C - battery degraded.

Pay attention to the bloating of the battery:

• Put the phone on a flat surface and spin it. If it wobbles, the battery swells.
• Check the gap between the screen and the body. If it is larger than 1 mm, it is a sign of bloating.
• Press the screen in the center. If there are waves, the battery presses on the display from the inside.

⚠️ Attention: B 2022 There was a wave of fake batteries for the Redmi Note. 11, swelling 2-3 Always check the labeling on the battery - the original has a holographic sticker with the code matching the serial number of the phone.

6. Performance and hardware check: how to detect replacement of components

Fraudsters often replace processors, RAM or storage with cheaper ones, so as not to miss this:

• 🖥️ Processor: use CPU-Z or AIDA64. Compare the chip model to the official specs. X5 The Pro should stand Snapdragon 778G, Not a Snapdragon 695.
• 🧠 RAM and storage: in the same applications, check the actual volume. → The memory is 128GB, and AIDA64 64GB is a fake, it's a fake.
• 🌡️ Overheating test: run 3DMark If you turn off your phone after 5 minutes of testing, it's either a marriage or a fake processor.

Pay special attention to the test NFC sensory:

• 📶 NFC: Try paying for something through Google Pay, and if it doesn't work, it's either disabled software or it's not physically available.
• 🧭 Gyroscope and accelerometer: Sensor Test, check all sensors. If any don't respond, the phone falls or gets disassembled.
• 🔊 Speakers: Turn the music on at maximum volume. Wheezing or different loudnesses indicate damage.

To verify the authenticity of the motherboard:

1. Remove the back cover (if possible without damage).
2. Find the marking on the board (usually starts with a MSM or SDM for Snapdragon).
3. Compare the photo with the original board of your model (see on the XDA Developers).

7 Software Checking: How to Detect Firmware or Viruses

Xiaomi’s re-interrupted smartphones can have:

• 📱 Chinese firmware under the guise of global (no Google Services, many unnecessary Chinese apps).
• 🔓 Unlocked bootloader, making the phone vulnerable to viruses.
• 🕵️ Hidden applications for mining or espionage.

How to check:

1. Go to Settings. → The phone. → Version. MIUI. If the version ends with CN — It's Chinese firmware.
2. Dial ##4636## and check Bootloader status. If it's Unlocked, the phone is flashed.
3. Install Malwarebytes and run the scan. Even 1 virus detected is a reason to refuse to buy.

💡

If the phone has a firmware with a suffix EEA (for example, MIUI 14.0.3 EEA), This is a European version that may not support some Russian frequencies (e.g. Band 20 for the first time). 4G).

Also check the developer’s settings:

1. Open the settings → Additional → for developers.
2. If the OEM unlock option is enabled, the phone was flashed.
3. If there are unknown menu items (for example, EngineerMode) – it is a modified firmware.

8. Check documentation and guarantees: how not to lose money

Even if the phone passes all the tests, without the right documents, you'll be left without a warranty.

• 📄 Warranty card: must be filled in the name of the seller (if you buy in the store) or yours (if by hand.
• 💳 Check: if you buy in the official store, a check is enough. If you buy from your hands, ask for a receipt with the passport information of the seller.
• 🌍 Warranty Region: Check if the warranty is valid in Russia, for example, phones purchased in Europe may not be repaired under Russian warranty.

Features of Xiaomi guarantee in 2026:

• 12 months from the date of activation (not purchase!).
• The warranty does not apply to the battery if its capacity has fallen by less than 20%.
• For repairs under warranty, an original box and equipment are required.

⚠️ Note: In 2023, Xiaomi tightened warranty rules, requiring not only a check, but also the original package with intact holographic stickers to be repaired, and if the box is thrown away, warranty repairs will be denied.

FAQ: Frequent questions when buying Xiaomi