How to Check the Display for Xiaomi Originality: The Complete Guide

Buying a Xiaomi smartphone is always a balance between advanced specs and an affordable price. However, the market is full of restored devices and copies, where unscrupulous sellers often replace quality components with cheap ones. The display is the most vulnerable and expensive element of the design, which is most often replaced. Owners of flagship models of the Mi and Redmi Note series are especially often faced with the situation when they are replaced by a low-quality matrix after replacing the broken glass.

Distinguishing an original AMOLED or high-quality IPS panel from a budget copy can be extremely difficult visually, especially if the device is new or in perfect condition. It is easy for a layman to mistake a bright but “scorched” copy for a quality original. In this article, we will discuss the detailed verification methods available to each user so that you can verify the authenticity of the screen of your gadget.

Modern screen manufacturing technology has advanced, and even copies have learned to mimic basic characteristics. However, color calibration, touch layer accuracy and plume quality remain the Achilles heel of fakes. Understanding these nuances will allow you to avoid buying a “horse in a coat” or poor-quality repairs in the future.

Visual analysis of images and color reproduction

The first thing to look at when turning on the device is the quality of the output image. Xiaomi’s original displays, especially in models with OLED or AMOLED arrays, have a deep black color and high contrast. Copies often sin gray black, which is especially noticeable when viewing dark images or in night mode.

Be sure to check the viewing angles. If the color begins to invert, turn yellow or turn very pale when you tilt your smartphone, this is a sure sign of a poor-quality matrix. The original display should retain color reproduction and brightness even at sharp angles. Also note the presence of a “rainbow effect” or graininess in a bright white background.

⚠️ Note: If you see a distinct grid of pixels (the “crystal grain” effect) in normal use, not just under a magnifying glass, chances are you’re looking at a cheap, low-resolution copy of the subpixels.

For a deeper analysis, turn on the white image at maximum brightness. Backlight uniformity is a key factor. Originals have barely noticeable deviations, whereas copies often show spots, lighter angles or dimming at the edges. This involves using a cheap light scatter.

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Use the White Screen Test app or simply open the full screen white picture in your browser to detect uneven backlights and broken pixels.

Checking through CIT's engineering menu

The most reliable software test is the CIT built-in engineering menu, a diagnostic tool that allows you to test all the hardware components of a smartphone, including the display, accessed through a special code in the Phone app.

Type ##6484## or ##4636## in the dialer. If the device is original and the firmware is not stripped, the testing menu will open, and here you are interested in a section related to the screen, often called "Display", "Color Bar" or "Touchpanel".

In screen check mode, go through several color cycles: red, green, blue, white and black. Watch the color transition carefully. On the original matrix, colors change instantly and uniformly. Copies may have delays, artifacts, or uneven glow of individual zones.

Pay special attention to the touch layer test. The CIT menu often has a line drawing function. Swipe your finger across the screen. If a line is interrupted in some areas or the sensor is "troit" (records several touches instead of one), this indicates defects in the digitizer, which is characteristic of non-original assemblies.

Analysis of technical characteristics and the plume

If there are no visual defects, you should look under the hood of the system. Information about the connected display is often stored in system logs or displayed in the engineering menu. For advanced users, information can be output via ADB (Android Debug Bridge).

Connect your smartphone to your computer, enable USB debugging, and type a command to get information about the display. Often, you can see the output of the matrix manufacturer, for example, Samsung, BOE or Tianma. If instead of a famous brand, you display "Unknown" or generic name, this is cause for doubt.

adb shell dumpsys SurfaceFlinger --list


adb shell cat /sys/class/drm/card0-DSI-1/panel_name

Physical inspection of the plume is possible only after partial disassembly of the device, but it gives a 100% guarantee. The original plumes have clear markings, smooth soldering and quality contacts. On copies, the marking is often blurred, and the plume itself can be stiffer or thinner than the original.

Also, pay attention to the thickness of the frames. Even if the matrix is good quality, but the frame around the image is wider than stated in the specifications for your model, so the screen is taken from another, cheaper model or is a universal copy.

Fingerprint and brightness tests

Modern Xiaomi smartphones often feature a fingerprint scanner built into the screen. It's one of the most complex technologies for high-quality copying. On the original AMOLED screens, the scanner works quickly and clearly. On copies, the scanning speed can drop, and the angle of the finger's application must be perfectly accurate.

Do a brightness test. Lower the brightness slider to a minimum. Original displays are able to reduce brightness to very low values, comfortable to read in the dark, without flickering (PWM may be present, but it should not be clearly visible to the eye like a strobe). Copies often have a high minimum brightness threshold, which causes the screen to "blind" at night.

Flicker check (PWM) is important for eye health. Turn on the camera of another smartphone and point the lens over the screen of the device being tested. If there are greasy dark stripes running on the screen, the frequency of PWM is low. Xiaomi's original screens, especially flagship ones, try to do at a high frequency or use DC Dimming.

Comparison with reference samples and software

Software aspects are not to be ignored. Some applications, such as Device Info HW or AIDA64, can provide detailed information about the connected display, and while this data can be forged at the firmware level, when combined with other methods, it gives a big picture.

Compare your device to photos and reviews of the exact same model on reputable technical resources. Pay attention to the saturation of the Mi logo when downloaded. On the originals it is clear, with smooth gradients. On copies, the logo may look faded or have compression artifacts.

Also important is the function Always On Display (AOD). On the original. OLED-screen AOD It uses minimal energy and looks clear.-OLED (copy IPS lighted or cheap OLED) AOD It can either be absent, or quickly plant the battery, or have a dull, blurry appearance.

⚠️ Note: If after system update MIUI/HyperOS colors on the screen have become unnaturally bright or, conversely, faded, check the settings in the menu "Advanced settings" → "Screen. Color profiles may have gone wrong, but it could also be a sign that the unoriginal matrix is not compatible with the new driver.

Final audit and conclusions

To sum up, no method offers absolute guarantees in isolation, only a comprehensive approach can determine the authenticity of the display with a high degree of probability, a combination of visual inspection, tests in the engineering menu and analysis of the behavior of the touch screen gives the most accurate result.

If you buy a smartphone from hand or in a questionable store, be sure to test for white and check the viewing angles at the seller. The seller's refusal to carry out these simple manipulations should alert you more than any specifications.

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The surest sign of originality is a combination of deep black color, instantaneous operation of the underscreen scanner and the absence of the effect of “crystal grain” on a white background.

Remember that even the original screens from different batches may differ slightly in color temperature, but they should never have physical backlight defects or idle sensor areas.