With the Mix 4, Xiaomi introduces a new high-end smartphone with impressive-sounding hardware equipment. The 6.67-inch Mix 4 has one of the fastest mobile SoCs with the Snapdragon 888+ 5G.
In addition, there are a 120-Hz AMOLED panel, up to 12 GB RAM and 512 GB storage, a 120-Watt charger offering quick charging, and 50-Watt wireless charging.
The camera also shows some high-end ambitions with the 108-MP Samsung Isocell HMX1 as the main sensor.
But this isn’t all, and the camera offers another interesting detail. The Mix 4 is the first Xiaomi smartphone with a front camera that is hidden under the screen.
It has a 20-MP resolution and goes completely without any notch or pop-up mechanics.
However, this isn’t a completely new feature, since other smartphones such as the Samsung Galaxy Fold 3 and ZTE Axon 30 also offer an under-display camera.
Officially, the Xiaomi Mix 4 is only available in China, but you can also get it in Germany from importers such as TradingShenzhen who provided us with our test unit.
We find out in this test how well the Mix 4 fares against the current high-end competitors and whether its under-display camera also does a good job in practice.
| Body | Dimensions: 162.6 x 75.4 x 8 mm (6.40 x 2.97 x 0.31 in) Weight: 225 g (7.94 oz) Build: Glass front (Gorilla Glass Victus), ceramic back, aluminum frame SIM: Dual SIM (Nano-SIM, dual stand-by) IP53, dust and splash protection |
| Display | Type: AMOLED, 1B colors, 120Hz, HDR10+, Dolby Vision, 800 nits (HBM) Size: 6.67 inches, 107.4 cm2 (~87.6% screen-to-body ratio) Resolution: 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) Protection: Corning Gorilla Glass Victus |
| Platform | OS: Android 11, MIUI 12.5 Chipset: Qualcomm SM8350 Snapdragon 888+ 5G (5 nm) CPU: Octa-core (1×2.99 GHz Kryo 680 & 3×2.42 GHz Kryo 680 & 4×1.80 GHz Kryo 680) GPU: Adreno 660 |
| Main Camera | Triple 108 MP, f/1.9, 24mm (wide), 1/1.33″, 0.8µm, Dual Pixel PDAF, Laser AF, OIS 8 MP, f/4.1, 120mm (periscope telephoto), PDAF, OIS, 5x optical zoom 13 MP, f/2.2, 12mm, 123˚ (ultrawide), 1/3.06″, 1.12µm Features: Dual-LED flash, HDR, panorama Video: 8K@24fps, 4K@30/60fps, 1080p@30/60/120/480fps; gyro-EIS, HDR10+ |
| Selfie Camera | Single 20 MP, 27mm (wide), 1/3.4″, 0.8µm, under display Features: HDR Video: 1080p@30fps |
| Battery | Type: Li-Po 4500 mAh, non-removable Charging: Fast charging 120W, 100% in 15 min (advertised) Fast wireless charging 50W, 100% in 28 min (advertised) Quick Charge 4 Power Delivery 3.0 |
| Memory | Card slot: No Internal : 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM UFS 3.1 |
