How to check the originality of the display Xiaomi

Buying a Xiaomi smartphone is often a compromise between cutting-edge specs and an affordable price, but owners of budget models often face the need to replace a broken screen. The parts market is crowded with offers where original matrixes coexist with cheap low-quality copies, and it is extremely difficult for an inexperienced user to distinguish them visually when buying. The original display not only provides accurate color reproduction and declared brightness, but also guarantees the correct operation of the sensor, which is critical for everyday use of the device.

Installing a low-quality analog can lead to a number of problems, from fast battery discharge and pixel burnout to complete touchscreen failure after a couple of weeks of operation. In this article, we will discuss in detail all the available methods of authenticating a screen, from simple visual inspection to the use of engineering menus and specialized software.

You don't need to be a certified engineer to do basic diagnostics, but knowing the intricacies of labeling and software tests will help you avoid unnecessary costs and re-repairs. We'll look at the differences between types of matrices, learn how to read hidden codes, and understand why the serial number on the plume is one of the main indicators of authenticity.

Visual Diagnostics and External Signs of Fake

The initial inspection is the first and most affordable step of the inspection, which can be done even without the device being turned on. Xiaomi's original displays, especially for the flagship Mi and Redmi Note series, have perfectly flat edges and no gaps between the glass and the frame. Copies often sin uneven fit, visible perimeter glue or overly thick bezels that visually reduce the usable screen area.

Pay attention to the image quality when the device is turned off: the black matte substrate of the original should not have rainbow shimmers or a grayish hue at an angle. IPS-matrixes of high quality retain a deep black color even when viewed sideways, whereas cheap counterparts can glow with white light, which is especially noticeable on dark wallpaper.

⚠️ WARNING: If you see clear bars, broken pixels or uneven lighting around the edges on the screen that is off, you are likely to see a restored part or a candid copy of low quality.

Also worth checking is the thickness of the plume and the quality of the soldering contacts. On the original components, the marking is clearly marked with a laser, and does not erase the finger, while on fakes, the text can be blurred or applied with cheap ink. Pay special attention to the hole for the front camera and speaker - in the original they always perfectly match the design of the case.

Software verification through engineering menu and codes

The most reliable way to learn the originality of the display Xiaomi is the use of built-in diagnostic tools of the MIUI system. the Engineering menu allows you to run an automatic test of all components, including the touch layer and color gamut, which is almost impossible to do visually.

Enter ##6484## or ##4636## in the dialer. If the code is entered correctly, the CIT (Customer Integration Test) menu will open, where you need to select the item associated with the screen check (usually called Display or Color Test).

During the color test, carefully monitor the uniformity of the backlight. Xiaomi's original AMOLED screens show saturated colors without overlighting, and the transitions between shades should be smooth. If you see sharp borders or color spots, this is a sure sign of poor-quality replacement.

##6484## - the main code for entering the CIT engineering menu
#4636## - Alternative code for checking device information

Do not forget that some global versions of firmware access to the engineering menu may be limited or require a connection to the Wi-Fi network. In such cases, you can use the standard application "Service" (Mi Service), which is preinstalled on all modern smartphones of the brand.

Analysis of serial number and markings on the plume

Each original display has a unique identifier stitched into the controller and applied to the security film of the plume. When disassembling the device (which requires certain skills and tools), you can compare the number on the plume with the number that is readable by software, the discrepancy of this data or the absence of the number at all indicates that the part is not original.

The labeling is usually located on a flexible cable next to the contact group and contains information about the manufacturer, release date and revision. On copies, this code is often either missing or is a random set of characters printed curve. The serial number is the passport of the part, and its presence is critical for quality assurance.

For software verification of serial number can be used ADB-if you have access to the debugging USB. Connect the smartphone to the computer and enter the command adb shell dumpsys SurfaceFlinger – in the output you can sometimes find information about the connected display and its identifier, although this method requires technical knowledge.

Testing of the sensor layer and multi-touch

The quality of the touchscreen is often affected primarily when replaced with a cheap counterpart. Xiaomi's original displays support full-fledged multi-touch (usually 10 touch points), which allows you to comfortably play games and quickly type text. Copies are often limited to 5 dots or have "dead zones" at the edges of the screen.

To check, use the built-in test in the engineering menu or download a specialized application from Google Play, such as the MultiTouch Tester. Swipe your fingers over the entire surface of the screen, including the corners. If the system does not register touches in certain areas or resets input while pressing several fingers at the same time, this is a sign of poor quality of the digitizer.

• 🖐️ Check the light touch response: the original responds instantly, the copy may have a delay.
• 🎮 Test scrolling in the news feed: jerks and twitches talk about problems with the sensor.
• 💧 Evaluate the work when connected charging: the originals do not lose sensitivity, cheap copies often “glutch».

Special attention should be paid to the operation of the screen with the charger connected. Cheap touchscreens often do not have a high-quality screen, which causes charging tips to cause chaotic pressing or complete loss of control. This is a critical defect that makes using the smartphone impossible during charging.

Differences between OLED, AMOLED and LCD copies

Many users confuse matrix types, which plays into the hands of unscrupulous sellers. Xiaomi's flagship models are fitted AMOLED super AMOLED Matrices that provide deep black and high contrast, but in the budget segment or when replaced, often install LCD-copies that are visually similar but technically very different.

The main difference is the way the lights are illuminated. AMOLED Each pixel glows on its own, so the black color on these screens looks like the part of the matrix that is turned off. LCD-The copies use constant backlighting of the entire screen, which always has a grayish shade, especially noticeable in the dark. AMOLED matrix.

⚠️ Note: If you are sold the original AMOLED» For the model that originally came out of LCD, Or vice versa, it's 100% a hoax. Always check the matrix type against the official specifications of your model.

Modern Xiaomi smartphones support 90 Hz or 120 Hz. Cheap copies often only work on the standard 60 Hz, which makes the interface less smooth. You can check the real frequency through the application "Refresh Rate Test" or in the developer settings.

Using the Mi Service Diagnostics App

The built-in Mi Service app (formerly known as Service & feedback) is a powerful self-diagnostics tool that doesn’t require root rights or a computer connection, and automatically checks the condition of the equipment and issues a report that can be used as an argument when arguing with a service center or parts seller.

Start the app, select Self-test, and wait until the scan is over, and the system will check not only the display, but also other modules, and if the test shows an error or warning about an unknown component after the screen is replaced, this is a clear signal that the part is not original.

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Before starting a full diagnosis, close all background applications and clear the RAM to be as accurate as possible.

The test results can be saved as a report or screenshot, and note the status of each item: a green tick indicates success, a red cross indicates critical error, and a yellow exclamation point indicates possible compatibility or quality issues.

Frequently Asked Questions (FAQ)

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The surest way to avoid problems is to contact only authorized Xiaomi service centers, where they use original spare parts and give a guarantee for work.