How to Check a Xiaomi Smartphone Before Buying: The Complete 2026 Guide

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

Xiaomi smartphones are the top price-performance smartphones, but that’s what makes them a favorite target for scammers. According to J’son & Partners, up to 18 percent of devices in the secondary market have hidden defects, and one in five “new” handsets are actually repaired, and even in official stores there are factory-failed phones that sellers are not always willing to admit.

The problem is compounded by the fact that Xiaomi is actively releasing models with similar characteristics (for example, the Redmi Note 12 Pro and Redmi Note 12 Pro).+), It allows unscrupulous sellers to sell a cheaper version under the guise of a flagship, and given that the battery and screen warranty is often only 6 months, buying a cat in a bag can turn into expensive repairs in a couple of weeks.

This article is not about "general tips," but about the specific steps that revealed the fraudulent schemes of 2023-2026, which will help us to distinguish the original from the fake, check the history of the device, identify hidden malfunctions, and even determine whether the phone was stolen.

Step 1: Checking the originality – how not to buy a clone or “gray” Xiaomi

The first thing you need to do is make sure that you're not a fake, because the scammers have learned to copy even boxes and documentation, so you can't focus on the packaging alone. Here are 3 key features of the original:

• 🔍 IMEI on the box and on the phone – should match what is specified in the Settings menu → The phone. → General information → IMEI. If the numbers do not match or there are two (on dual-SIM models), but only one on the box - this is a reason to be wary.
• 📦 Serial number on the box and under the battery - on the original devices it is duplicated on the sticker under the battery (if removable) or under the back cover (on monolithic models), on fakes it is often not or it does not match.
• 🛡️ Checking through the official service - enter IMEI site mi.com/global/verify. If the system gives an error or the data does not match the model on the box, you have a clone or a “gray” device.

Pay special attention to models POCO And Black Shark, which is the most commonly counterfeited because of the high demand among gamers, POCO F5 Pro is often given out for POCO F5, They have different processors (Snapdragon 8).+ Gen 1 vs Snapdragon 7+ Gen 2).

⚠️ Note: If the seller refuses to put the phone in his hands for inspection IMEI Or saying, "The system is not working" is a sure sign of cheating, even if the machine is dead, IMEI You can check through the engineering menu (click *#06# on the dial keyboard).

Step 2: External inspection – what gives a used or restored phone

Even if the phone looks like new, it doesn't guarantee it hasn't been repaired. Xiaomi manufacturers use special autopsy indicators -- little stickers that break when the case is opened.

• 📱 Under the tray SIM-maps (on most models).
• 🔧 Under the back cover (if it is removable, like Redmi's). 9A).
• 🔌 Next to the charging connector (on some flagships, for example, Xiaomi 13 Ultra).

If the sticker is torn or not at all, the phone has been opened, which doesn't always mean it's broken (perhaps just dust-cleaned), but requires a deeper check.

• 🔎 The gaps between the screen and the body are uniform on the original devices. If there is a wider gap, the screen is changed.
• 🎨 Color of the case – after replacing the rear panel, the shade may differ (especially noticeable on glossy models, for example, Xiaomi). 12T Pro).
• 🔊 Speakers and microphones -- check the grids for scratches or dents. If you have any, the phone dropped.

Feel free to flash through the screen with a flashlight at an angle, as you can see the traces of glue after changing the display. On the original Xiaomi screens, the glue is applied evenly, without bubbles or leaks.

Step 3: Screen check – how to identify broken pixels and matrix swapping

The screen is the most expensive component in a smartphone, so it is most often faked or restored. Even if at first glance the display looks perfect, perform these tests:

1. Broken pixel test – Open a monochromatic image (white, black, red, green, blue background) to the full screen. Broken pixels will be visible as color dots. Download the Screen Test app from Google Play for automatic verification.
2. Sensitivity check: swipe your finger around the edges of the screen, and if it's delayed or lost, it's a sign of a non-original matrix or poor calibration.
3. Burnout test: display a white background and look at it from an angle. If you see traces of previous images (like a navigation bar), the screen is worn out.

And look at the matrix type. Xiaomi has models with the AMOLED (for example, Xiaomi 13 and IPS (If the seller claims that the phone is on the phone AMOLED, But on the test, black looks gray — it's a fake. AMOLED deep-black).

⚠️ Note: If the screen of the Xiaomi phone has an oleophobic coating (repels fat), but the fingers slide too easily or, conversely, “cling” is a sign of glass replacement.

Step 4: Diagnostics of Iron – How to Check the CPU, Memory, and Battery

Hidden hardware problems don't show up immediately, but they can make the phone unusable in a few months.

• 📊 Benchmark tests – install AnTuTu or Geekbench and compare the results with the reference for your model. For example, the Snapdragon 8 Gen 2 in Xiaomi 13 must give at least 1,200,000 points in AnTuTu. If the numbers are lower by 20% or more, the processor is not original or overheats.
• 🔥 Trottling test - run it. CPU Throttling Test from Google Play: If performance drops after 5-10 minutes, it’s a sign of wear or bad thermal paste.
• 💾 Memory check – enter the ##4636## command in the engineering menu, then select Testing → Memory Test. If the test fails, the memory module is damaged.

Now the battery is the most vulnerable component, and even if the phone was new, the battery could have been in storage for years.

• 🔋 Capacity -- you can install AccuBattery and see the actual capacity, and if it's less than 10 percent less than the declared capacity, the battery is worn out. For example, the Redmi Note 11 Pro.+ original capacity of 4500 mAh, and after 500 charging cycles it drops to 3800-4000 mAh.
• ⚡ Charging speed – plug in the original power supply and record charging time from 0 to 100%. 12T Pro (supported) 120W) Charging longer than 20 minutes – battery or charger problem.
• 🌡️ Heat – if the phone warms up even when charging simply (no load), it’s a sign of a battery or controller malfunction.

Critical information: On Xiaomi models with fast charging support (for example, 67W or 120W) Fraudsters often install cheap batteries without high currents, and not only do they fail quickly, they can ignite when the original charger is used.

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If the seller says the phone is “almost new, lying idle,” ask for usage statistics in Settings. → Battery → If it says more than 200 charge cycles, that's a complete hoax.

Step 5: Checking the camera – how not to buy a phone with a soap lens

Xiaomi cameras are famous for their quality, but this module is most often damaged when falling, and scammers can replace the lens with a cheap one, or even turn off some of the cameras in the firmware.

• 📸 Test all modules - open the standard Camera application and turn on each mode in turn: main camera, wide-angle, macro, telephoto (if any). If any mode is missing, this is a sign of a software shutdown or hardware breakdown.
• 🔍 Focus check – point the camera at the text from close range (10-15 cm). If the image is not focused or artifacts appear, the lens is damaged.
• 🎥 Video in the video 4K — record video at maximum resolution, if there are jerks, twitches or noises recorded with interference, there is a problem with the microphone or the processor.

Note the serial numbers of the cameras. In the engineering menu (#4636##) select Hardware Testing. → If the serial numbers of the modules do not display or repeat, the cameras are not original.

Especially carefully check flagship models such as Xiaomi 13 Ultra with Leica system. Fraudsters often replace branded lenses with cheap ones, and in firmware replace the Leica logo to create the appearance of the original.

Step 6: Check the software part – firmware, locks, and hidden features

Even if the hardware is fine, the phone can be locked, have viruses or have unofficial firmware.

• 🔒 Google account (FRP) — If the phone was reset via Recovery but was not withdrawn from Google account, after the reset it will require entering the username and password of the previous owner. → The phone. → Resetting settings).
• 📵 IMEI blacklisted -- if a phone is lost or stolen, it could be put on a database of stolen devices. IMEI at imei.info.
• 🛡️ Mi Account – some Xiaomi models have a binding to the Mi Account. If the seller has not untied the device, you will not be able to use some features (for example, Find Device).

Fraudsters often install custom firmware to hide the real state of the phone.

• 📱 Version MIUI — Go to Settings. → The phone. → Version. MIUI. If the version is very old (for example, MIUI 12 on a 2023 phone), it's a sign of unofficial firmware.
• 🔧 bootloader status – enter the command fastboot oem device-info in ADB. If Device unlocked: true, the bootloader is unlocked, which could mean installing custom firmware.
• 🕵️ Hidden applications – check the list of installed applications for suspicious programs (e.g. KingRoot, SuperSU.

If the phone is in error when updating via Settings → Updating the system is a sure sign of an unofficial firmware or a changed region. Xiaomi's original devices should be updated without problems.

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If a vendor says that the phone was "sweetened to improve performance," it's almost always a hoax. MIUI Optimized by the manufacturer, and any modifications are warranty-free.

Step 7: Checking for stolen or credit device

Buying a stolen phone is fraught with moral consequences, but also technical problems: stolen devices are often blocked by operators, and credit cards can be tied to the bank accounts of the previous owner.

• 📋 Checking the base of the Ministry of Internal Affairs - enter IMEI If the phone is wanted, it can be seized.
• 💳 Credit history - ask the seller to show the contract of sale or check. If the phone was bought on credit, check whether it is repaid (through the service of the Central Committee of the Russian Federation).
• 📡 Locking the operator - insert your own SIM-If the phone is locked under the operator (for example, MTS or Beeline), it will not be used with other SIMs.

Be especially careful about phones that are sold "cheap" with phrases like "urgently need money" or "gift, not needed." Often these are stolen or credit devices, and the lack of boxes, documents or accessories (charging, cable) should also be alerted.

⚠️ Warning: If the seller asks for cash without a receipt or offers to meet in an unusual place (for example, by the subway instead of the house), these are sure signs of fraud. IMEI and the passport data of the seller.

Step 8: Final Check – What to Do Before Payment

Before you transfer money, follow these mandatory steps:

1. Complete reset — ask the seller to reset to the factory settings in front of you. If he refuses, it's a reason to doubt the integrity. After the reset, check that the phone turns on and goes through the initial setup without errors.
2. Check all the sensors -- install the Phone Doctor Plus app and test the gyro, the accelerometer, the proximity, lighting, and fingerprint sensor, and if any sensor doesn't work, the phone gets repaired.
3. Communication test – call from your phone, check mobile Internet (4G/5G), Wi-Fi and Bluetooth. If you have a connection problem, maybe the module is damaged. RF.
4. Warranty check – if the phone is new, check the warranty card on Xiaomi’s website. make sure the serial number matches what’s on the box and on the phone.

If everything is in order, make a contract of sale indicating:

• IMEI telephone;
• serial number;
• models and configurations;
• passport data of the seller and the buyer;
• dates and amounts of the transaction.

Feel free to film the process of checking on video - this is your insurance in case the seller later declares that the phone was correct. Remember: it is better to spend an extra 10 minutes checking than then spend months on trials and repairs.

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If the seller rushes you or says "everything is checked" - that's a red flag.

FAQ: Frequent questions when checking Xiaomi before buying