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Xiaomi Mi MIX 2 Teardown

As one of the best-selling smartphones in the market, the Xiaomi Mi MIX 2 has made many improvements in its internal design and material. The teardown of the phone is not difficult. Now, let’s start the teardown on the Mi MIX 2.

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Xiaomi Mi MIX 2 SIM card tray
The phone’s SIM card tray design is in a quite tight layout, and no particles can be found in the SIM card tray.

removing Xiaomi Mi MIX 2 back cover

Utilize the pick and suction cup to expand the seam between the back case and the body.

sealant
The newly added sealant doesn’t have good viscosity.

open Xiaomi Mi MIX 2 back case
Then open the back case. But the back case can’t be completely separated from the phone because the ribbon wire of the fingerprint reader is still connected to the motherboard.

removing Xiaomi Mi MIX 2 main cover
The main cover has been removed successfully. It adopts a metal injection molding process, and the gold-printed antenna has been designed into the plastic layer.

Xiaomi Mi MIX 2 antenna design
The number of antennas has increased owing to the enhancement of communication capability. Xiaomi Mi MIX’s surface is covered with an NFC antenna, while the Xiaomi Mi MIX 2’s NFC antenna has been removed from the back case. The LED flash the Xiaomi Mi MIX adopts on the back has been designed on the Mi MIX 2’s main cover. In this way, LED flash failure resulting from poor contact can be avoided.

Xiaomi Mi MIX 2 connection method to motherboard
The Xiaomi Mi MIX 2’s connection method to the motherboard is different from that of its predecessor because of the vibrating earphones. It connects to the motherboard via a bridge circuit on the main cover. The metal material the MIX 2’s main cover adopts is thinner than the plastic material MIX features. With such a design, the phone can bring better electrostatic shielding.

Xiaomi Mi MIX 2 motherboard connector layout
Compared with its last generation, the MIX 2 has made some adjustments to the motherboard connector’s layout. The main changes include that the phone has replaced piezoelectric ceramic components with vibrate earphones, and the liner vibrator has superseded the rotor vibrator. Compared with the rotor vibrator, the linear vibrator acts with a swifter response and creates lower noise. The phone has a canceled earphone port, which can improve the sealing effect.

Xiaomi Mi MIX 2 internal design without back case
After removing the back case, the MIX 2’s internal design can be seen. It is obvious that the phone continues the MIX’s design and adopts a three-stage layout. It has a new design for the speaker structure. The battery doesn’t take up much space, as the motherboard does.

Xiaomi Mi MIX 2 back design
The MIX 2 continues the MIX’s design on the back. However, it adds a double-sided tap around the phone not only to avoid the MIX’s loose problem but also to improve the sealing effect. Personally speaking, if the phone’s back adopts a curved surface design like the Note series, there will be great improvements in both ergonomics and appearance.

power off Xiaomi Mi MIX 2's system
The analysis on the back case is over. Power the system off first before continuing the teardown.

removing Xiaomi Mi MIX 2' motherboard
Then, remove the motherboard.

Xiaomi Mi MIX 2's motherboard space utilization on the top
The motherboard has a low utilization of space on its front part. The component density is low, which is why the two phones have large motherboards.

Xiaomi Mi MIX 2 heat dissipation
The MIX’s utilization of the motherboard’s space is a mess, while the MIX 2 has slightly improved on it. The material for cooling on the shielding case is covered with a metal cooling paste. The MIX adopts S-shaped thermal silica on the thermal conductive paste, while the MIX 2 uses thermal silica gel. With such a change, the MIX 2 has a certain improvement in the heat dissipation effect.

Xiaomi Mi MIX 2 internal design without motherboard

Here is the whole device without the motherboard.

removing Xiaomi Mi MIX 2 earphone
Take out the earphones on the top. The earphones look the same as the Mate 10’s.

Xiaomi Mi MIX 2 vibrator
This vibrator is not big, but it is thicker than common rotor vibrator.

removing Xiaomi Mi MIX 2 screws at the bottom
The teardown of the top components is basically over. Now, remove the fixed screws at the bottom.

Xiaomi Mi MIX 2 loudspeaker
Although two phones’ loudspeakers are from AAC, the MIX 2’s loudspeaker has made some changes in its structure. But there is no big difference between their sound qualities.

removing Xiaomi Mi MIX 2 deputy board
Remove the deputy board. We can find that the data port has adopted a sealing design, and its front part is covered with a thick rubber ring, which aims to enhance the sealing effect.

Xiaomi Mi MIX 2 LED indicator
The LED indicator is on the right, and the ambient light sensor is supposed to be on the left.

Xiaomi Mi MIX 2 front camera
The front camera is mini and has a parameter of 500W.

removing Xiaomi Mi MIX 2 battery
Then, remove the battery. The battery is fixed by two easy-to-pull stickers. The sticker is easy to break. After we take the picture, the sticker gets broken, and it drops under the battery. I suggest pulling out the sticker slowly at a slant of 60 degrees upward.

Xiaomi Mi MIX 2 battery
The MIX 2 battery is supplied by SCUD. Its capacity is 3,400mAh, while the MIX has a 4,00mAh battery. It supports 18W fast charging, which is far from the standard that the terminal device’s fast charging reaches. After all, current flagships feature a battery that supports over 20W fast charging. Of course, I refer to Android phones, excluding iPhones.

Easy-to-pull sticker
The easy-to-pull sticker still remains on the back.

Xiaomi Mi MIX 2 main camera and front camera
There is the main camera and the front camera. The main camera is much bigger than the front camera since it supports the OIS function.

removing the metal heat dissipation paste
After removing the metal heat dissipation paste from the motherboard’s back, the Hynix memory chip can be seen. It can be inferred that the Snapdragon 835 chip is placed under it.

PM8998 power management chip
The other small one with thermal silica is the PM8998 power management chip.

remove a shielding case
What was left on the back was the welding shielding case, so I stopped the teardown on the back. Now, let’s look at its front part. I can only remove a shielding case.

Xiaomi Mi MIX 2 internal picture
Close up the picture of the front of the motherboard.

Source

Ryen

Ryan is a mobile news editor whose interest in the latest technological trends and gadgets dates back to his childhood, whether it's computers, cell phones, or car technology.

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