Xiaomi Mi 9 SE vs Xiaomi Redmi 4X vs Xiaomi Redmi Note 4X comparison
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| key specs |
| Display | 5.97-inch | 5.00-inch | 5.50-inch |
| Processor | Qualcomm Snapdragon 712 | Qualcomm Snapdragon 435 | Qualcomm Snapdragon 625 |
| Front Camera | 20-megapixel | 5-megapixel | 5-megapixel |
| Rear Camera | 48-megapixel + 8-megapixel + 13-megapixel | 13-megapixel | 13-megapixel |
| RAM | 6GB | 2GB | 3GB |
| Storage | 64GB | 16GB | 32GB |
| Battery Capacity | 3070mAh | 4100mAh | 4100mAh |
| OS | Android 9.0 | Android MIUI 8 | Android 6.0 |
| Resolution | 1080x2340 pixels | 720x1280 pixels | 1080x1920 pixels |
| general |
| Brand | Xiaomi | Xiaomi | Xiaomi |
| Model | Mi 9 SE | Redmi 4X | Redmi Note 4X |
| Release date | February 1, 2019 | February 1, 2017 | February 1, 2017 |
| Form factor | Touchscreen | Touchscreen | Touchscreen |
| Dimensions (mm) | 147.50 x 70.50 x 7.45 | 139.24 x 69.96 x 8.65 | 151.00 x 76.00 x 8.45 |
| Weight (g) | 155.00 | 150.00 | 165.00 |
| Battery capacity (mAh) | 3070 | 4100 | 4100 |
| Fast charging | Proprietary | - | - |
| Colours | Deep Grey, Holographic Illusion Blue, Holographic Illusion | Cherry Pink, Champagne Gold, Matte Black | Cherry Powder, Champagne Gold, Platinum Silver Grey, Matte Black, Hatsune Miku Exclusive Colour |
| Removable battery | - | No | No |
| display |
| Screen size (inches) | 5.97 | 5.00 | 5.50 |
| Touchscreen | Yes | Yes | Yes |
| Resolution | 1080x2340 pixels | 720x1280 pixels | 1080x1920 pixels |
| Pixels per inch (PPI) | 432 | - | 403 |
| hardware |
| Processor | 2.3GHz | 1.4GHz octa-core | 2GHz octa-core |
| Processor make | Qualcomm Snapdragon 712 | Qualcomm Snapdragon 435 | Qualcomm Snapdragon 625 |
| RAM | 6GB | 2GB | 3GB |
| Internal storage | 64GB | 16GB | 32GB |
| Expandable storage | - | Yes | Yes |
| Expandable storage up to (GB) | - | 128 | 128 |
| Expandable storage type | - | - | microSD |
| camera |
| Rear camera | 48-megapixel (f/1.75) + 8-megapixel (f/2.4) + 13-megapixel (f/2.4) | 13-megapixel | 13-megapixel |
| Front camera | 20-megapixel | 5-megapixel | 5-megapixel |
| Rear flash | - | LED | Yes |
| software |
| Operating system | Android 9.0 | Android MIUI 8 | Android 6.0 |
| Skin | MIUI 10 | - | - |
| connectivity |
| Wi-Fi | Yes | Yes | Yes |
| Wi-Fi standards supported | 802.11 a/b/g/n/ac | 802.11 b/g/n | 802.11 a/b/g/n |
| GPS | Yes | Yes | Yes |
| Bluetooth | Yes, v 5.00 | Yes, v 4.20 | Yes, v 4.20 |
| NFC | Yes | No | No |
| USB Type-C | Yes | - | - |
| Number of SIMs | 2 | 2 | 2 |
| Infrared | - | No | Yes |
| USB OTG | - | Yes | Yes |
| Headphones | - | 3.5mm | 3.5mm |
| FM | - | No | Yes |
| Wi-Fi Direct | - | No | No |
| Mobile High-Definition Link (MHL) | - | No | No |
| sim 1 |
| SIM Type | Nano-SIM | Nano-SIM | Micro-SIM |
| GSM/CDMA | GSM | GSM | GSM |
| 3G | Yes | Yes | Yes |
| 4G/ LTE | Yes | Yes | Yes |
| sim 2 |
| SIM Type | Nano-SIM | Micro-SIM | Nano-SIM |
| GSM/CDMA | GSM | GSM | GSM |
| 3G | Yes | Yes | Yes |
| 4G/ LTE | Yes | Yes | Yes |
| sensors |
| Face unlock | Yes | - | - |
| Fingerprint sensor | Yes | - | - |
| Compass/ Magnetometer | Yes | No | Yes |
| Proximity sensor | Yes | Yes | Yes |
| Accelerometer | Yes | Yes | Yes |
| Ambient light sensor | Yes | Yes | Yes |
| Gyroscope | Yes | Yes | Yes |
| Barometer | - | No | No |
| Temperature sensor | - | No | No |