| key specs |
| Display | 6.39-inch | 6.26-inch | 6.21-inch | 5.90-inch |
| Processor | Qualcomm Snapdragon 855 | Qualcomm Snapdragon 660 | Qualcomm Snapdragon 845 | Qualcomm Snapdragon 625 |
| Front Camera | 20-megapixel | 24-megapixel | 20-megapixel | 8-megapixel |
| Rear Camera | 48-megapixel + 12-megapixel + 16-megapixel | 12-megapixel + 5-megapixel | 12-megapixel + 12-megapixel | 13-megapixel + 2-megapixel |
| RAM | 6GB | 4GB | 6GB | 4GB |
| Storage | 128GB | 64GB | 64GB | 64GB |
| Battery Capacity | 3300mAh | 3350mAh | 3400mAh | 3000mAh |
| OS | Android 9.0 | Android | Android | Android 8.0 (Android One) |
| Resolution | 1080x2340 pixels | 1080x2280 pixels | 1080x2248 pixels | 720x1440 pixels |
| general |
| Brand | Xiaomi | Xiaomi | Xiaomi | Motorola |
| Model | Mi 9 | Mi 8 Lite | Mi 8 Screen Fingerprint Edition | One |
| Release date | February 1, 2019 | - | September 1, 2018 | August 1, 2018 |
| Form factor | Touchscreen | - | - | Touchscreen |
| Dimensions (mm) | 157.50 x 74.67 x 7.61 | 156.40 x 75.80 x 7.50 | - | 150.00 x 72.20 x 8.00 |
| Weight (g) | 173.00 | 169.00 | - | 162.00 |
| Battery capacity (mAh) | 3300 | 3350 | 3400 | 3000 |
| Fast charging | Proprietary | Quick Charge 3.0 | Quick Charge 4+ | - |
| Wireless charging | Yes | - | - | - |
| Colours | Deep Grey, Holographic Illusion Blue, Holographic Illusion | Midnight Black, Aurora Blue | - | - |
| display |
| Screen size (inches) | 6.39 | 6.26 | 6.21 | 5.90 |
| Touchscreen | Yes | Yes | Yes | Yes |
| Resolution | 1080x2340 pixels | 1080x2280 pixels | 1080x2248 pixels | 720x1440 pixels |
| Protection type | Gorilla Glass | - | - | - |
| Aspect ratio | 19.5:9 | - | 18.7:9 | 18:9 |
| Pixels per inch (PPI) | - | 403 | - | - |
| hardware |
| Processor | 2.84GHz octa-core | octa-core | octa-core | 2GHz |
| Processor make | Qualcomm Snapdragon 855 | Qualcomm Snapdragon 660 | Qualcomm Snapdragon 845 | Qualcomm Snapdragon 625 |
| RAM | 6GB | 4GB | 6GB | 4GB |
| Internal storage | 128GB | 64GB | 64GB | 64GB |
| Expandable storage type | - | microSD | - | microSD |
| Dedicated microSD slot | - | No | - | - |
| Expandable storage | - | - | - | Yes |
| Expandable storage up to (GB) | - | - | - | 256 |
| camera |
| Rear camera | 48-megapixel (f/1.75, 0.8-micron) + 12-megapixel (f/2.2, 1.0-micron) + 16-megapixel (f/2.2, 1.0-micron) | 12-megapixel (f/1.9) + 5-megapixel (f/1.9) | 12-megapixel (1.4-micron) + 12-megapixel (1.4-micron) | 13-megapixel (f/2.0) + 2-megapixel (f/2.4) |
| Rear autofocus | Yes | - | - | Phase detection autofocus |
| Rear flash | Yes | Yes | - | LED |
| Front camera | 20-megapixel (f/2.0, 0.9-micron) | 24-megapixel | 20-megapixel (f/2.0, 1.8-micron) | 8-megapixel |
| software |
| Operating system | Android 9.0 | Android | Android | Android 8.0 (Android One) |
| Skin | MIUI 10 | MIUI | MIUI | - |
| connectivity |
| Wi-Fi | Yes | Yes | Yes | Yes |
| Wi-Fi standards supported | 802.11 a/b/g/n/ac | - | - | 802.11 a/b/g/n/ac |
| GPS | Yes | Yes | Yes | - |
| Bluetooth | Yes, v 5.00 | Yes, v 5.00 | Yes | Yes, v 5.00 |
| NFC | Yes | - | - | - |
| USB Type-C | Yes | - | - | Yes |
| Number of SIMs | 2 | 2 | 2 | - |
| Headphones | - | 3.5mm | - | - |
| sim 1 |
| SIM Type | Nano-SIM | Nano-SIM | - | - |
| GSM/CDMA | GSM | GSM | - | - |
| 3G | Yes | Yes | - | - |
| 4G/ LTE | Yes | Yes | - | - |
| sim 2 |
| SIM Type | Nano-SIM | Nano-SIM | - | - |
| GSM/CDMA | GSM | GSM | - | - |
| 3G | Yes | Yes | - | - |
| 4G/ LTE | Yes | Yes | - | - |
| sensors |
| Face unlock | Yes | Yes | Yes | - |
| 3D face recognition | Yes | - | - | - |
| Fingerprint sensor | Yes | Yes | Yes | Yes |
| Compass/ Magnetometer | Yes | Yes | Yes | Yes |
| Proximity sensor | Yes | Yes | Yes | Yes |
| Accelerometer | Yes | Yes | Yes | Yes |
| Ambient light sensor | Yes | Yes | Yes | - |
| Gyroscope | Yes | Yes | Yes | Yes |