TeardownXiaomi Phone Repair

Xiaomi Mi 8 Teardown

Xiaomi held an annual flagship conference to officially launch the Xiaomi Mi 8 on May 31, 2018. The 6.21-inch flagship features a rear fingerprint sensor, and it also supports IR face unlock. By the way, its Explorer Edition comes with the world’s first pressure-sensitive in-screen fingerprint sensor, and it supports 3D structured-light face unlock. Today, we will show the teardown process of the Xiaomi Mi 8 and you can see the internal structure of this flagship.

The phone features a fringe screen. This fringe looks wider and bigger than the fringe other smartphones adopt. It comes with a curved-edge glass body. From that, it can be inferred that no glue or screw is used to fix the back cover. There is no screw found at the bottom of the phone. I heat up the edges of the smartphone with a heater. Then, use a plastic chip to separate the back cover from the phone body. Now, the back cover can be removed. After removing the back cover, its internal structure can be seen.

The fingerprint reader module is connected to the motherboard via a cable. The cable can be easily removed for its port is neither fixed by a metal sheet nor a screw. After the back cover removed, lots of heat dissipation film, metal sheet, and the copper sheet can be seen. After I take it out from the phone body, the back cover basically keeps intact without any scraps even the glue is used to fix the back cover of the phone body. After I take out screws, the motherboard and vice board can be removed. Now, we can see the three-stage internal design more clearly.

The NFC chip is integrated on the cover plate of the motherboard. The part with black lines is the NFC chip. Now, we can see that the loudspeaker is fixed on the cover for the vice board. Removing three small screws used to fix the motherboard and the vice board, and then the motherboard and the vice board can be taken out. After taking out the motherboard, we can have a direct view of the camera design. The yellow component is the heat dissipation copper sheet.

It is not easy to take out the main camera. Firstly, remove the glass cover plate for the main camera in a violent way (for there is no choice). Once it removed, the cover plate can be applied to the main camera again for it is stuck to the main camera with glue.

Now, the main camera is taken out although the teardown process is not easy. The secondary camera is fixed on the metal shield of the motherboard via copper sheet. Tearing down a camera means that the heat dissipation structure will be destroyed. Below the fringe is the camera for selfie, proximity sensor, infrared camera, earphone and infrared LED. The teardown process on the infrared camera is quite easy. Disconnect the cable, and then it can be taken out, which causes no damage to the structure.


There is the front camera, the camera for selfies and the infrared camera. Twenty screws in two types have been removed from the smartphone. It sports a 3400mAh battery made by SCUD. The phone uses a long-line vibration motor.

Metal contacts of the earphone and the infrared LED can be seen. The type-C port with charging, earphone and data functions is integrated on the vice board. The back of the vice board is stuck to the phone body with the double-sided tape. Until now, I have finished the teardown on the Xiaomi Mi 8.
All parts in one picture




I love mobile phones. My first mobile phone is Samsung S4. Since then, I have used Xiaomi Mi2, Honor 7, Huawei Mate 9 and Huawei Mate 20 Pro. Similarly, I also love to write articles about mobile phones.

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