Xiaomi smartphone owners often face the need to replace a broken screen, but the parts market is oversaturated with low-quality copies.The original display provides the right color reproduction, accurate sensor response and durability, whereas cheap counterparts can fail in a couple of months.Understanding the differences between a factory part and a replica is a skill that will save your money and nerves when repaired.
Chinese parts manufacturers have learned to create very accurate copies that are almost indistinguishable from the original, but have critical differences in operation. In this article, we will examine the software and hardware methods of verification so that you can independently conduct a diagnostic of Xiaomi before or immediately after installing a new matrix.
The brand’s smartphones use sophisticated OLED and AMOLED technologies that are difficult to replicate in the budget segment, and it is the quality of pixel glow and color calibration that become the main markers of authenticity. Next, we will look in detail at ways to detect counterfeits without the use of specialized laboratory equipment.
Visual Diagnostics and Image Quality
The first thing to pay attention to when inspecting is the saturation and depth of black. AMOLED The arrays used in the original displays are able to completely disable the pixels when displaying black, creating an effect of absolute blackness. IPS-analogues that are often given out as OLED, always have backlights, so black looks like dark gray, especially noticeable in the dark.
The second important aspect is the viewing angles, and if you tilt the original screen, the colors will remain the same, the contrast will change slightly. In non-original modules, you often see color inversions or a strong fading of the image when you look at the angle. IPS technology, even high-quality, behaves differently than OLED, and you should not confuse them.
Notice that there is a black bezels around the image, some copies have a smaller active area than the original, which causes black bars to appear on the edges, which should not be there. Also check the automatic brightness: the original sensors change it smoothly, and in fakes, this process may be stepwise or absent.
- 🔍 Check black in the dark – it should be perfectly black, without backlighting.
- 👁️ Assess viewing angles – colors should not go gray or invert.
- 📏 Measure the frame – the active area should reach the edges of the protective glass.
- ☀️ Test autobrightness – changes should be smooth and invisible to the eye.
⚠️ Note: If the brightness is twisted to the maximum when installing a new screen, and the image is still dim, most likely, you have installed a cheap one. IPS-copy AMOLED.
It's also worth checking for the rainbow effect or moire effect in bright light. Cheap glass and film used in replicas often have the wrong anti-reflective coating, which creates visual noise. In the original details, the oleophobic coating is applied uniformly and does not distort the picture even under direct sunlight.
Checking through the engineering menu and codes
The most reliable way to program verification is using the built-in CIT (Customer Inspection Test) menu, which requires you to open the Phone app and type the combination ##6484##. This code works on most Xiaomi devices and allows you to start a deep diagnostic of all components.
In the menu that opens, select the item associated with the display (usually called Display or Screen). Here you can see technical information about the connected module. However, be careful: some advanced copies are able to “slip” fake data, showing as the original in the system.
What if the code doesn't work?
For more information, you can access the debugging menu. To do this, activate the developer mode by quickly clicking 7 times on the build number in the About Phone section. Then, in the developer menu, look for the Display Control Panel or similar, where the type of panel you connect sometimes shows.
- 📱 Enter the code ##6484## in the test call.
- ⚙️ Activate Developer Mode to Access Hidden Settings.
- 📝 Compare the name of the screen model with the specified specifications.
- 🔄 Test the sensor response in the menu CIT.
⚠️ Attention: Menu availability CIT It does not guarantee the originality of the display, as the sensor can be detected correctly even on copies.
Remember that after the display is replaced, the system may require time to calibrate. If after a few days of use the colors become dim or yellow, this is a sure sign of degradation of materials of the non-original matrix.
Test for broken pixels and sensor
The quality of control of the production of the original Xiaomi screens implies the absence of broken pixels. CIT-Backlight test menu or use special solid color images (white, red, green, blue) with black dots visible on white background and glowing ones on black background.
The Touch test detects dead zones or false positives. In the original displays, the grid is uniform, and lines are not interrupted when you draw your finger. In copies, you often find areas where the finger slips or, conversely, the screen responds to touch where there are none.
☑️ Sensor check.
Multi-touch is a big focus. Modern smartphones support simultaneous touching of 5, 10 or more points. Cheap copies are often limited to 2-5 points, which can be checked in the same engineering menu or running a simple test application from the Play Market.
| Parameter | Original | Copy (Remark) |
|---|---|---|
| Broken pixels | Absent. | Often 1-3 pcs. |
| Multitouch | 10 points | 2-5 points |
| Response | Instant. | Delay 0.1-0.5 sec. |
| False touches | No. | Possible. |
If you notice that the screen reacts with a delay or you have to push harder on certain areas, this indicates a low quality digitizer. In gaming applications, such problems manifest themselves especially clearly, making the game impossible.
Hardware differences of the plume and design
If you can remove the back cover or have already removed the old display, carefully inspect the plume. On the original modules, the marking is clearly, laser or high-quality printing, and contains manufacturer codes (for example, EBBP, Tianma, Samsung).
Notice the color and thickness of the plume. The original plumes are usually thin, flexible, and have a characteristic orange or yellowish shade of insulation. The rough, thick and hard plumes of black or dark green are a sign of budget production. Also check the connector: in the original it matches perfectly with the connector on the board, while in copies it can dangle or require effort to connect.
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Before buying, take a picture of the plume of your broken original display (if it reads). Compare the code and the location of contacts with the new module - this is the most reliable method of checking hardware.
The build quality of the module itself also plays a role. Original screens are often framed (with a body) where all adhesive joints are neat, without glue protrusions. In copies, the frame can be skewed, and the dynamic head or proximity sensor can be glued curved or completely absent (if they were rearranged from the old screen).
- 🔌 Inspect the connector for backlash and quality of purging contacts.
- 🏷️ Check the marking on the plume - it should be clear and indelible.
- 🧱 Assess the quality of the glue in the frame - there should be no leaks and bubbles.
- 📐 Compare the thickness of the plume with the original sample.
A poor plume is not just a risk of poor contact, but a potential cause of failure of the power controller on the phone's motherboard. Cheap insulation can lead to short circuit.
Impact on the operation of the smartphone and battery
Installing a non-original display can adversely affect the autonomy of the device. AMOLED-screens consume less energy, especially when displaying dark themes, thanks to the technology of self-glowing pixels. IPS, require constant operation of backlight, which leads to increased battery consumption.
In addition, cheap display controllers can incorrectly interact with the MIUI energy saving system, which is manifested in the fact that the phone warms up in standby mode or quickly discharges when using the screen, the system can incorrectly determine the brightness level, keeping the backlight at maximum.
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Increased battery consumption and heating of the bottom of the smartphone (where the display plume is located) are frequent satellites of low-quality copies of screens.
Also worth mentioning is the Always On Display (AOD) feature, which is smooth and energy efficient on original screens, and may not work at all on copies, or cause static elements to quickly discharge and burn out in a short time.
In rare cases, installing an incompatible or defective display can lead to software conflicts, expressed in periodic phone restarts or interface freezes. If after changing the screen, the smartphone began to behave unstable, the problem is likely in a new detail.
Where to buy and how to protect yourself
To minimize the risks, buy displays only from trusted stores with a good reputation and warranty. Avoid offerings on marketplaces with suspiciously low prices - the original screen can not cost 10-15 dollars, its price is usually 30-50% of the cost of a new phone.
When buying from a service center, demand a warranty for work and part. An honest craftsman will always warn you of the risks of installing a copy and offer options. If you are told that “it is the original, just from China”, but the price is three times lower than the market price, you are being scammed.
Keep checks and packaging away from the part. Original parts are often packed with parts. QR-The key is that you can return the product if you have hidden defects during the warranty period.
- 💰 Don’t chase the lowest price – the original is never cheap.
- 📜 Require a check and warranty card when buying and installing.
- 🏪 Choose stores with a physical address and reviews.
- 📦 Check the packaging and package before payment.
⚠️ Warranty "from the store" often only applies if installed by the wizard. If you change the screen yourself, the warranty on the part itself can be limited to 14 days.