Compare phones
| Global Score | |
| 76.1 | 83.8 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | -- |
| 2020-06-29 | 2018-11-01 |
| 6.61 x 3.02 x 0.32 inches | 6.22 x 2.94 x 0.33 inches |
| 6.81 ounces | 7.69 ounces |
| Black | Black, Blue and Green |
| Plastic and Plastic | Aluminum and Ceramic |
| $ 194.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 1600 x 720 pixels | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 270 pixels per inch | 403 pixels per inch |
| -- | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 8.6 |
| Performance | |
| Mediatek Helio P35 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| PowerVR GE8320 GPU | Adreno 630 GPU |
| 9.27 | 9.63 |
| Storage | |
| 32 GB internal memory | 256 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 13.3 |
| Camera | |
| 16.00 MP + 13.00 MP | 12.20 MP + 24.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 0.33 inches (1/3.06") sensor | 0.39 inches (1/2.55") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| -- | 1920 x 1080 (960 fps) (Full HD) slow motion video |
| 9.35 | 10.34 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.7 | 6.3 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 3200mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 5.2 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Xiaomi Mi Mix 3 is better than the Samsung Galaxy A21, with a score of 83.8 against 76.1. Although it's the best cellphone in this review, Xiaomi Mi Mix 3's construction is older, heavier and a bit thicker than Samsung Galaxy A21. Xiaomi Mi Mix 3 has a sharper display than Samsung Galaxy A21, because although it has a little smaller screen, it also counts with a greater display pixels density and a much higher resolution of 1080 x 2340.
Xiaomi Mi Mix 3 features a much greater storage for games and applications than Samsung Galaxy A21, because although it has no SD extension slot, it also counts with 224 GB more internal storage. The Xiaomi Mi Mix 3 features a bit better hardware performance than Galaxy A21, and although they both have the same number of cores, the Xiaomi Mi Mix 3 also has more RAM.
The Galaxy A21 features better battery lifetime than Xiaomi Mi Mix 3, because it has a 25 percent bigger battery size. The Xiaomi Mi Mix 3 features a superior camera than Samsung Galaxy A21, because although it has a back facing camera with much less megapixels resolution, and they both have a same size camera aperture, the Xiaomi Mi Mix 3 also counts with a bigger back camera sensor taking more light and vivid colors and a lot better 3840x2160 video definition.
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