As one of the best-selling smartphones in the market, the Xiaomi Mi MIX 2 has made many improvements on 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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The antenna’s number has been increased owing to the enhancement of communication capability. Xiaomi Mi MIX’s surface is covered with NFC antenna, while the Xiaomi Mi MIX 2’s NFC antenna has been removed to 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’s failure resolute from poor contact can be avoided.
The Xiaomi Mi MIX 2’s connection method to the motherboard is different from its predecessor’s because of vibrating earphone. It connects to the motherboard via 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 design, the phone can bring better electrostatic shielding.
Compared with its last generation, the MIX 2 has made some adjustments on motherboard connector’s layout. The main changes include that the phone has replaced piezoelectric ceramics components with vibrate earphone and liner vibrator has superseded rotor vibrator. Compared with rotor vibrator, the linear vibrator acts with the swifter response and creates lower noise. The phone has canceled earphone port, which can improve sealing effect.
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 three-stage layout. It has a new design on loudspeaker structure. Its battery doesn’t occupy much space since its motherboard has occupied much.
The MIX 2 has continued the MIX’s design on the back. But it adds double-sided tap around the phone not only to avoid the MIX’s loose problem but improve sealing effect. Personally speaking, it will have great improvements both on ergonomics and appearance if the phone’s back adopts curved surface design like the Note series.
The motherboard has low utilization of space on its front part, which continues the MIX’s feature, top part in particular. The component density, as a whole, is low. That’s the reason for two phones’ large motherboard.
The MIX’s utilization of motherboard’s space is a mess, while the MIX 2 has slightly improved on it. Material for cooling on the shielding case is covered with 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 change, the MIX 2 has certain improvement on heat dissipation effect.
Here is the whole device without the motherboard.
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 slant 60 degree upward.
The MIX 2’s battery is provided by SCUD. The battery’s capacity is 3,400mAh, while the MIX’s battery capacity is 4,00mAh. It supports 18W fast charging, which is far from reaching the standard that terminal device’ fast charging reaches. After all, current flagships sport the battery which supports over 20W fast charging. Of course, I refer to Android phones exclude iPhone.