| Xiaomi Mi A3 | ||
| Hardware | ||
| CPU | Qualcomm Snapdragon 665 | Apple A11 Bionic |
| GPU | Adreno 610 | Apple GPU (3-core graphics) |
| RAM memory | 4 GB | 2 GB |
| Storage memory | 64 Gb | 64 GB |
| Max memory card | 256 GB | 64 GB |
| Form factor | ||
| Lenght (mm) | 153.5 | 138.4 |
| Width (mm) | 71.9 | 67.3 |
| Thickness (mm) | 8.5 | 7.3 |
| Weight (g) | 174 | 148 |
| Jack | yes | no |
| USB type | Type C | Proprietary |
| USB norm | 2.0 | 2.0 |
| Infrared | yes | no |
| Screen | ||
| Size (inch) | 6.09 | 4.7 |
| Resolution | 720x1560 | 750 x 1334 |
| Ratio | 19:5:9 | 16:9 |
| Protection | Corning Gorilla Glass 5 | Ion-strengthened glass |
| Type | Amoled | IPS LCD |
| Surface (%) | 82 | 65.4 |
| dE White | 6.6 | NotAvailable |
| dE Red | 7.7 | NotAvailable |
| dE Green | 9.5 | NotAvailable |
| dE Blue | 2.5 | NotAvailable |
| dE Yellow | 5.7 | NotAvailable |
| dE Cyan | 9.7 | NotAvailable |
| dE Magenta | 1.6 | NotAvailable |
| Contrast | 60000:1 | 1395:1 |
| Max brightness | 350 | 640 |
| Sensors | ||
| Resolution - front | 48 | 7 |
| Sensor - front | Sony IMX582 Exmor RS | N/A |
| Resolution - back | 9 | 12 |
| Sensor - back | N/A | Apple iSight Camera (8) |
| Video resolution | 2160p | 2160p |
| 4.71 mm | NotAvailable | |
| 1.66 mm | NotAvailable | |
| NotAvailable | ||
| Benchmark | ||
| Antutu - global | 139716 | 23008 |
| Antutu - CPU | 63405 | NotAvailable |
| Antutu - GPU | 31225 | NotAvailable |
| Antutu - UX | 34735 | NotAvailable |
| Antutu - MEM | 10351 | NotAvailable |
| 3DMark - OpenGL | 1079 | NotAvailable |
| 3DMark - Vulkan | 1041 | NotAvailable |
| Radio capacity | ||
| 3G frequencies | B1, B2, B4, B5, B8 | B1, B2, B4, B5, B8 |
| 4G frequencies | B1, B2, B3, B4, B5, B7, B8, B20, B28, B38, B40 | B1, B2, B3, B4, B5, B7,B8 , B12, B13, B17, B18, B19, B20,B25, B26, B27, B28, B29, B30, B34, B38, B39, B40, B41 |
| 5G frequencies | NotAvailable | |
| NotAvailable | ||
| GPS | A-GPS, Beidou, GLONASS, GPS | A-GPS, Cell ID, GLONASS, GPS, Wi-Fi |
| Wifi | 802.11a, 802.11ac, 802.11b, 802.11g, 802.11n, 802.11n 5GHz | 802.11a, 802.11ac, 802.11b, 802.11g, 802.11n, 802.11n 5GHz |
| Bluetooth | Bluetooth 5.0 LE | Bluetooth 5.0 LE |
| SAR (head) | 0.301 | 1.19 |
| SAR (body) | 1.097 | 1.17 |
| VoLTE | yes | yes |
| Wifi calls | no | |
| NFC | no | yes |
| Radio capacity | NotAvailable | |
| NotAvailable | ||
| NotAvailable | ||
| NotAvailable | ||
| Battery | ||
| Capacity | 4030 | 1821 |
| Fast charging | yes | yes |
| Max charging W | 10 | 15 |
| Sound | ||
| Frequency Respons | +0.02 / -0.05 | NotAvailable |
| Noise Level | -92.5 | NotAvailable |
| Dynamic Range | 89.9 | NotAvailable |
| THD (%) | 0.003111 | NotAvailable |
| Intermodulation Distortion | 0.01 | NotAvailable |
| Stereo Crosstalk | -88 | -80.4 |
| Operating system | ||
| OS Version | Android One | iOS 11 |
| Base OS | Android 9.0 | iOS |