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Xiaomi Mix 4


Xiaomi Mix 4
Xiaomi Mix 4 (Mix Series)
Qualcomm Snapdragon 888 Plus 5G 8 x 1.8 - 3 GHz, Cortex-X1 / A78 / A55 (Kryo 680)
Graphics adapter
12 GB 
6.67 inch 20:9, 2400 x 1080 pixel 395 PPI, capacitive, AMOLED, FHD+, 480 Hz scan rate, Gorilla Glass Victus, glossy: yes, HDR, 120 Hz
512 GB UFS 3.1 Flash, 512 GB 
, 481.2 GB free
1 USB 2.0, USB-C Power Delivery (PD), Audio Connections: 3.5 mm Headset jack, 1 Fingerprint Reader, NFC, Brightness Sensor, Sensors: accelerometer, gyro, proximity, compass, color spectrum, DRM Widevine L1, Camera2 API Level 3
Wi-Fi 6E (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6/ Wi-Fi 6E 6 GHz), Bluetooth 5.2, 2G (850/900/1800/1900 MHz), 3G (850/1900/2100 MHz), 4G (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B26/B28), 5G (N1/N3/N5/N8/N28/N41/N77/N78/N79), Dual SIM, LTE, 5G, GPS
height x width x depth (in mm): 8.02 x 162.65 x 75.35 ( = 0.32 x 6.4 x 2.97 in)
4500 mAh Lithium-Polymer
wireless charging, fast charging / Quickcharge
Operating System
Android 11
Primary Camera: 108 MPix (Samsung ISOCELL HMX, OIS, f/1.95, 24mm, 1/1.33", 0.8µm) + 8MP (OIS, 5x optical zoom, f/4.1, 120mm) + 13MP Ultrawide (f/2.2, 12mm, 1/3.06", 1.12µm)
Secondary Camera: 20 MPix under-display, 27mm, 1/3.4", 0.8µm
Additional features
Speakers: Harman Kardon dual speakers, Keyboard: virtual, 120 W charger, USB cable, protective case, MiUI 12.5, 12 Months Warranty, fanless
225 g ( = 7.94 oz / 0.5 pounds), Power Supply: 185 g ( = 6.53 oz / 0.41 pounds)



Average Score: 83.93% - good
Average of 4 scores (from 9 reviews)
price: 60%, performance: 75%, features: 54%, display: 97% mobility: 90%, workmanship: 89%, ergonomy: 79%, emissions: 97%

Reviews for the Xiaomi Mix 4

87.7% Xiaomi Mix 4 smartphone review - High-end with an invisible selfie camera | Notebookcheck
The Mix 4 is the first smartphone from Xiaomi with a front camera under the display. The glass and ceramics clad 6.67-inch smartphone offers additional purchase arguments with its high-end Snapdragon 888+ SoC, up to 12 GB of RAM, an AMOLED panel, and a triple-camera system with 108 MP. In addition, there is also quick charging at 120 watts, recharging the battery in less than 30 minutes.
Xiaomi Mi Mix 4 Review: Hidden Selfie Camera Under Smartphone Screen
Source: Awaqua English
After my next full testing of the flagship smartphone model Xiaomi Mi Mix 4, I was left with only good and pleasant impressions. For example, one of the advantages I can attribute is the high-quality materials used. For example, the back of the case was made of ceramic, and the front had Gorilla Glass Victus. Also, I did not find any special complaints about the assembly of the device. As for the screen, it also pleased me with its brightness and the presence of great functionality. It’s 120Hz refresh rate, HDR10 +, and more. The performance of the smartphone was also excellent, as demonstrated by the synthetic benchmarks and games. At the same time, I cannot say that the camera showed itself from the bad side, since on board the 108 MP device the sensor shot bright and rich photos and videos. And, of course, battery life was also good, but only when using a 60 Hz refresh rate. Also, the presence of fast charging will allow you to charge the device up to almost 100% for 15-20 minutes.
Single Review, online available, Very Long, Date: 10/13/2021
Xiaomi Mi Mix 4 Review, Pros and Cons
Source: OI Spice Tech News English
As you see that the price of the Xiaomi Mi Mix 4 is high, you might need to restrict your desire to buy this phone. But people who are looking for such a specific phone can buy this phone that is still the best in the market. You will receive many phones, but not like this. Xiaomi has always surprised us with its low-budget smartphones and string specs. This is another amazing moment smartphone users will witness. If you can spend 60k, this is a better choice than any other phone on the market. You might be thinking of alternatives. Hope you also understood that you’re not going to get a phone like the Mi Mix 4 on this budget, with all the best features available on the market. If you wait a bit, you can find a great competitor to the Mix 4 which is the Vivo iQOO 8 Pro, but with a little higher price and features.
Single Review, online available, Medium, Date: 08/26/2021
Xiaomi Mix 4 Review - The BEST Under Display Camera Is HERE!
Source: TechTablets English
Xiaomi Mix 4 Review. A detailed review of the new SD888+ UDC Flagship with 120W charging, 6.67" 120Hz AMOLED screen, 108MP camera, ceramic rear, and 50W wireless charging
Single Review, online available, Very Long, Date: 08/25/2021
Xiaomi Mi MIX 4 Review: The Most Perfect Full-Screen Flagship
Source: Igeekphone English
Xiaomi Mi MIX 4 also has the most luxurious fast charge. To be precise, it is a wired super fast charge of up to 120W and a standard 50W wireless super fast charge. No matter which charging method you prefer, Mi MIX 4 can let you have the fastest charging speed, and the 4500mAh battery is not small. Although the fast charging power is easily affected by the temperature image, for example, 120W can be charged to 80% in only 10 minutes in theory, but it is only about 60% in practice. However, even the speed after the high temperature drops, the Xiaomi MIX 4 can also guarantee Fully filled within 20 minutes, still ahead of most other products on the market.
Single Review, online available, Very Long, Date: 08/12/2021

Foreign Reviews

88% Xiaomi Mix 4
Source: German DE→EN
Single Review, online available, Long, Date: 09/09/2021
Rating: Total score: 88% performance: 75% display: 100% mobility: 90% workmanship: 90%
70% Xiaomi Mi Mix 4
Source: Tudo Celular Portuegese PT→EN
Single Review, online available, Medium, Date: 01/25/2022
Rating: Total score: 70% price: 60%
Обзор Xiaomi Mix 4: смартфон с невидимой селфи-камерой
Source: RU→EN
Positive: Nice selfie camera; great hardware; large screen; nice display; good speakers; fast and wireless charging. Negative: Heavy and bulky; no memory expansion slot; noisy under loads.
Single Review, online available, Very Long, Date: 01/18/2022
Обзор Xiaomi MIX 4 — без рамок, без фронталки
Source: Hi-Tech Mail RU→EN
Positive: Beautiful design; great built quality; nice display; decent main camera; fast and wireless charging; good speakers. Negative: Poor selfie camera; slippery; hot processor while using.
Single Review, online available, Long, Date: 11/09/2021
90% Test Xiaomi Mi Mix 4
Source: NO→EN
Single Review, online available, Medium, Date: 12/04/2021
Rating: Total score: 90%



Xiaomi MIX 4 is a smartphone that claims to be the pioneer of full screen. Ever since the concept of the full screen was proposed, the market has experienced screen scaling, bangs, water droplets, and perforations from year 2016 to 2021, Finally now smartphones achieve true full screen by having an under-screen camera. Xiaomi used a 6.67-inch Huaxing Optoelectronics AM OLED 1080P pearl screen, which is a diamond-like arrangement. It is theoretically better in resolution than the shadow arrangement. It supports 120Hz refresh rate and 480Hz touch sampling rate, as well as these and other features. The surface is covered with Corning Gorilla Victus glass, and the front is much more resistant to fall than the back. This generation of MIX 4 has an all-in-one ceramic body. Taking into account the addition of ceramic material, the weight of 225g is not bad. The texture and unique luster of the ceramic material can cause it to be heavier. The phone also added screen fingerprints and dual light sensors. Although the edge of the Mi MIX 4 is curved, the curved surface is only slightly curved. The front look and feel are like a straight screen, which takes care of the hand feel and compares to the conventional curved screen edge. MIX 4 also debuted the Snapdragon flagship core 888Plus in the second half of the year, which is featured in the MIX 4. Based on 888, this SoC increased the X1 ultra-large core frequency to 3.0GHz, and the AI performance increased by 23%. It also has LPDDR5 RAM and UFS 3.1 storage and has a graphene soaking plate to better control the temperature.


The MIX 4 also gave the best in terms of charging, 120W wired fast charging and 100W wireless fast charging. It is worth mentioning that Xiaomi offers different charging modes this time. In the fast mode, it only takes 15 minutes and 28 minutes for wired and wireless to fill the phone. If you want to charge at "normal temperature" with greater peace of mind, it only takes 21 minutes and 45 minutes to fill the device with wired or wireless. As for the camera, the rear camera consists of 108MP main camera (ISOCELL Bright HMX sensor with optical anti-shake, 7P lens), 13MP ultra-wide angle (using its own curved lens) and 8MP periscope 5x telephoto end (with optical anti-shake) The focal lengths are 12mm, 24mm and 120mm respectively. In addition, this phone also has dual stereo speakers tuned by Harman Kardon (1014 and 1216P super linear speakers on the top and bottom), built-in multifunctional NFC, infrared module and X-axis linear motor, and has an increasingly popular UWB Features. Considering that there are not many Xiaomi products that support UWB at present, the factory also prepares a "One Finger Connecting Companion" so that you can use it with an existing device. Finally, in the system, the factory also added a new anti-lost mode, system-level translation, AI subtitles, voiceprint noise reduction and other functions. In conclusion, Xiaomi MIX 4 is a great choice for users who want an upgrade. It features top notch performance and great looking design which is suitable for any users who want a fresh experience.

Qualcomm Adreno 660: Graphics chip for smartphones and tablets that is integrated within the Qualcomm Snapdragon 888 SoC. Qualcomm claims that it is 35% faster than the Adreno 650 in the Snapdragon 865 SoC and offers a 20% better power efficiency.For Android it should be one of the fastest graphics cards in 2021.

Modern games should be playable with these graphics cards at low settings and resolutions. Casual gamers may be happy with these cards.

» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.

SD 888+ 5G: High-end SoC for smartphones that was introduced in mid 2021 and manufactured in 5 nm at Samsung. Integrates one “Prime Core” based on a ARM Cortex-X1 architecture clocked at up to 3 GHz. Three more performance cores are based on the A78 but clock up to 2.42 GHz. Furthermore, four energy saving cores are integrated that are based on the ARM Cortex-A55 architecture and clock at up to 1.8 GHz. In addition to the processor cores, the SoC integrates a WiFi 6e modem, a Hexagon 780 DSP (up to 26 TOPS of AI performance) and a Spectra 580 ISP. The integrated memory controller now supports faster LPDDR5 memory with up to 3,200 MHz. 5G is now included in the chip with the Snapdragon X60 modem.» Further information can be found in our Comparison of Mobile Processsors.


It is a small display format for smartphones. You shouldn't be severely defective in vision, and you won't see much detail on the screen and only have a small resolution available. For that, the device should be small and handy, easy to transport.

» To find out how fine a display is, see our DPI List.


Founded in 2010, Xiaomi Corporation is a Chinese multinational electronics company and produces consumer electronics and related products, including smartphones, televisions, fitness bands, power banks, headphones, smart devices and accessories. Xiaomi offers its products under the Mi, Redmi and POCO brands.

83.93%: This rating is slightly above average, there are somewhat more devices with worse ratings. However, clear purchase recommendations look different.

» Further information can be found in our Notebook Purchase Guide.


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Current Prices
Stefan Hinum (Update: 2021-09-26)