Xiaomi has officially launched its new flagship – the Mi MIX 2S. This phone continues to adopt design that the Mi MIX 2 uses and it boasts of full screen 2.0 with narrowed bezels on both sides. Featuring dual-rear vertical setup and fingerprint reader on the back, the MIX 2S boasts four-sided curved ceramic back plate to deliver an amazing hand feel.
Since it boasts of such excellent appearance design, how about the phone’s workmanship on its internal design? Today, we will take apart the MIX 2S to explore its internal structure.
This is the phone’s appearance design on the back. It features four-sided curved ceramic back plate and brings good texture. With AF fingerprint-proof coating on the back, basically no fingerprint will be left on the phone.
The phone’s ceramic back cover is surrounded with glue. Heat up and use a pick to remove the back cover.
When removing ceramic battery cover, slowly open it from one side to avoid disconnecting fingerprint ribbon cable. After removing the back cover, we can see wireless charging coil. NFC antenna is placed on the wireless charging coil.
It is phone’s back cover. We can see its battery cover adopts gum and plastic snap joint design but not completely use gum.
This is fingerprint reader module on the back.
The phone’s rear-dual vertical camera lens use scratch-resistant sapphire glass with hardness reaching 9H. Lens’ peripheral metal holder is approximately 0.05mm higher than the glass for protection purpose.
Xiaomi’s ceramic battery cover uses new tetragonal system ceramic material to better strengthen phone’s hardness.
With it uncovered, we can see that graphite chip is piled in dual layers and it nearly covers all the area on the motherboard. Such design is to help heat dissipation. Besides, a 3400mAh battery occupies much space.
After taking out motherboard and battery, a U-shaped groove is found on the motherboard. This part reserves for the hidden earphone unit.
The phone’s main rear camera uses a 12MP Sony IMX363 sensor, 1.4μm and four-axis optical image stabilization. Besides, its secondary rear camera uses a 12MP Samsung S5K3M3+ sensor.
It is copper film on the back of the dual-rear camera setup.
After take out the motherboard, we find that the area where the main chip is placed has a big hole which is to help better heat dissipation. But such design will bring difficulty to the process.
The most important components on the motherboard including CPU, RAM and flash are covered with nanometer carbon copper which is compatible with heat dissipation and conductive functions. This material can solve both heat dissipation and shield problems.
It is the front of the motherboard. The white part on the left top corner is a voice-generating device of the ultrasonic distance sensor, and the semicircle part on the right is the receiver. The distance between face and a phone can be calculated via s series of algorithm on this area.
It is back of the motherboard.
Details of the motherboard’s back area
With 8GB LPDDR4 memory chip removed, the most important component – the Snapdragon 845 processor can be seen.
The hidden earphone uses a 50mv large core. It will work as an auxiliary component to the loudspeaker to increase the whole device’s volume.
Take out the earphone. It is the internal structure without the earphone.
Heat up and remove front plate. To protect LCD module and TP, decoration bar is designed on the front plate.
We find this front plate uses PA high fiber with high intensity after using infrared spectroscopy to analyze. Compare with glass fiber PC, PA has better hardness and size stability. Xiaomi adds this component to improve full screen phone’s hardness.
We can see the internal structure of the hidden earphone and ultrasonic distant sensor- three independent acoustic seal cavities.
It is sound induction tube.
Front and rear camera
Front and rear camera size
Now, let’s have a look on the phone’s core components. During the whole teardown process, we find that the Xiaomi Mi MIX 2S has applied some new design to its internal structure owing to full screen design. It brings the phone great challenge to place ultrasonic system, high-powered earphone and dual-rear cameras which supports OIS function on the cramped top space.