How to Check Xiaomi’s Screen for Originality: The Complete Guide

The modern mobile accessories market is full of high-quality copies of displays that are visually virtually indistinguishable from factory counterparts. Smartphone owners Xiaomi, Redmi and Poco often face the need to replace broken glass, but after installing a new part notice strange artifacts, dim lighting or touchscreen problems. The original screen is not just a glass panel, but a complex technological unit that includes a matrix, a digitizer and controllers working in perfect synchronization with the device's processor.

Poor replacement can lead not only to poor color reproduction, but also to increased battery consumption, overheating and even damage to the motherboard due to voltage surges. In this article, we will discuss in detail the methods of software and visual diagnostics that will help you determine whether your device has an original matrix or a cheap copy of the Copy or OEM class.

Checking the display is the first step before buying a used device or after visiting a service center. Ignoring the signs of a non-original build can cost you expensive repairs in the future. Below are proven ways to verify the Xiaomi screen for authenticity using built-in system tools and careful visual analysis.

Visual inspection and tactile quality check

The first thing that catches your eye when you encounter a non-original display is the image quality and physical parameters of the frame. Even the most expensive copies often sin uneven backlighting, which is especially noticeable on a white background at maximum brightness. Xiaomi's factory screen always has a perfect uniformity of glow throughout the area, while copies often show lights in corners or dark spots.

Notice the thickness of the frames and the quality of the adhesive. When replaced in artisanal conditions, the leakiness is often broken, and you can see air bubbles or dust under the glass. Also important is the oleophobic coating: swipe your finger across the screen. The original finger slides easily and silently, and the copy can be difficult to move, and finger marks are erased for a long time.

Color reproduction is another critical point: Xiaomi's original AMOLED arrays have a rich but natural color; copies often go yellow or unnatural blue; if you notice that white looks grayish, that's a sure sign of low contrast.

• 👁️ Check the uniformity of white at maximum brightness in the dark.
• 🖐️ Evaluate the slip of the finger on the surface and the presence of an oleophobic layer.
• 📏 Compare the thickness of the frames with photos of the original device on the Internet.
• 🌈 Note the absence of color spots or gradients on a monotonous background.

⚠️ WARNING: If you see a rainbow grid or “crystal effect” from a viewing angle, it’s almost guaranteed a sign of cheapness. IPS-copy instead of the original AMOLED-panel.

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When buying a used phone, always turn on the white background and reduce the brightness to a minimum - it is at low brightness on cheap matrices that a "ladder" of gradients and flickering is visible.

Use of the engineering menu and CIT-test

The most reliable software method for testing Xiaomi screen for originality is using the built-in CIT (Customer Interface Test) engineering menu, which is designed for factory diagnostics and allows you to test all components of the device, including the display, touchscreen and sensors, accessed through a special menu or code.

To get into the testing menu, open the Phone app and dial the combination ##6484##. If the code didn't work, go to Settings → About Phone → Kernel Version (click 5-7 times fast). In the menu that opens, select CIT or Version & Test. Here you are interested in the section related to the display.

In the display test mode, the screen will be consistently painted red, green, blue and white. Carefully inspect the surface for broken pixels that do not light up or burn in a different color. Also, multi-touch check is often available on this menu: swipe multiple fingers at once to make sure the screen registers all touches without crashing.

Some versions of MIUI or HyperOS firmware may hide detailed information about the matrix manufacturer in this menu, but the fact that you pass the test for dead zones and color uniformity is an important indicator. If the screen passes all the tests, but visually you are confused, it is worthwhile to move to a deeper analysis through ADB or third-party applications.

• 🔢 Enter the code ##6484## to log into the engineering menu.
• 🎨 Take the test to display the main colors (RGB).
• ✋ Check the multi-touch work by drawing with a few fingers.
• 🔦 Make sure the lighting and proximity sensor is working.

Analysis of technical characteristics through applications

Third-party utilities such as Device Info HW, AIDA64 or CPU-Z can be used to verify the data directly from the device controllers and can provide data about the display model, although manufacturers often hide the exact name of the panel.

Launch the app and go to Display or Screen. Pay attention to resolution, pixel density (DPI) and refresh rate. If the specifications are lower than stated resolution (e.g. HD+ instead of FullHD+) or 60 Hz instead of 90/120 Hz, then you are clearly unoriginal or overstuffed matrix.

Also worth paying attention to the color gamut. apps often indicate support for DCI-P3 or sRGB. Xiaomi's original screens, especially in flagship models, support wide color spaces. If the application reports a lack of support for a wide range on the model where it should be, this is cause for doubt.

It's important to understand that software techniques can be bypassed by the craftsmen who scour copy controllers, so application data should be considered as additional, but not the only information, and the combination of AIDA64 data and visual inspection gives the most accurate result.

Checking the operation of the sensor and multi-touch

The quality of the touchscreen (digitizer) is where copies most often fail. Even if the matrix looks good, the sensor may not work properly. Use the Drawing test in the engineering menu to check, or download the MultiTouch Tester app. Xiaomi's original screen is capable of registering up to 10 simultaneous touches without delay.

Try typing quickly or playing dynamic games. On non-original screens, there is often a "ghost touch" effect, where the phone reacts to touches you didn't make, or, conversely, ignores your clicks in certain areas, a sign of poor quality of the digitizer layer.

Another test is water and moisture sensitivity, where original screens with technologies like Super Touch work correctly even with wet hands (though you shouldn't wet your phone), and copies of the humidity start to react randomly to touch or stop working altogether.

• 🎮 Test the screen in a fast paced game (shooters, races).
• ✍️ Check the keyboard for missing letters.
• 💧 Evaluate the response to light touches and touches in gloves (if supported).
• 🔄 Make sure there are no spontaneous presses on the desktop.

⚠️ Note: If the underscreen fingerprint scanner stopped working or started to make mistakes after being replaced, it is likely that a screen is installed without a transparent window for the sensor or a low quality transmitting layer.

Differences in the work of autobrightness and sensors

Xiaomi's original displays are tightly integrated with the light sensor system. The original autobrightness algorithms work smoothly: the screen gradually gains brightness in light and decreases it in the dark. On copies, this process often occurs in jerks, or the brightness does not change at all, remaining at a fixed level.

Check the proximity sensor when you call. Hold the phone to your ear, the screen should go out. Take it away, light up. On non-original builds, the sensor calibration is often knocked down, which causes the screen to stay on during a conversation (you press a button with your cheek) or, conversely, to go out when you just hold the phone in your hand.

Also, pay attention to the behavior of the screen at low battery power. Original AMOLED arrays can slightly change color reproduction to save energy, but do it predictably. Cheap analogs can start flickering or give out artifacts already at 20-30% charge due to unstable power control.

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Smooth and predictable operation of autobrightness is one of the most difficult parameters for counterfeiting, as it requires accurate calibration of sensors in the factory.

You can use the Sensor Test app to check the calibration, and it will show raw data from the light sensor, and if the lighting changes, the values change randomly or do not change at all, this is a sign of problems with the module replaced.

Frequent Questions and Challenges (FAQ)