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Xiaomi Redmi S2 vs Xiaomi Redmi 4A vs Xiaomi Redmi Note 4 comparison
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| key specs | ||||
| Display | 5.99-inch | 5.00-inch | 5.50-inch | |
| Processor | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 425 | Qualcomm Snapdragon 625 | |
| Front Camera | 16-megapixel | 5-megapixel | 5-megapixel | |
| Rear Camera | 12-megapixel | 13-megapixel | 13-megapixel | |
| RAM | 3GB | 2GB | 4GB | |
| Storage | 32GB | 16GB | 64GB | |
| Battery Capacity | 3080mAh | 3120mAh | 4100mAh | |
| OS | Android 8.1 Oreo | Android 6.0 | Android 6.0 | |
| Resolution | 720x1440 pixels | 720x1280 pixels | 1080x1920 pixels | |
| general | ||||
| Brand | Xiaomi | Xiaomi | Xiaomi | |
| Model | Redmi S2 | Redmi 4A | Redmi Note 4 | |
| Release date | May 1, 2018 | November 1, 2016 | August 1, 2016 | |
| Form factor | Touchscreen | Touchscreen | Touchscreen | |
| Dimensions (mm) | 160.73 x 77.26 x 8.10 | 139.50 x 70.40 x 8.50 | 151.00 x 76.00 x 8.30 | |
| Weight (g) | 170.00 | 131.50 | 175.00 | |
| Battery capacity (mAh) | 3080 | 3120 | 4100 | |
| Removable battery | No | No | No | |
| Colours | Black, Rose Gold, Gold, White, Blue, Red, Pink, Gray, Silver | Golden, Rose Gold, Dark Grey | Gold, Grey, Matte Black | |
| Launched in India | - | Yes | Yes | |
| display | ||||
| Screen size (inches) | 5.99 | 5.00 | 5.50 | |
| Touchscreen | Yes | Yes | Yes | |
| Resolution | 720x1440 pixels | 720x1280 pixels | 1080x1920 pixels | |
| Aspect ratio | - | 16:9 | 16:9 | |
| Pixels per inch (PPI) | - | 296 | 401 | |
| hardware | ||||
| Processor | 2GHz octa-core | 1.4GHz quad-core | 2GHz octa-core | |
| Processor make | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 425 | Qualcomm Snapdragon 625 | |
| RAM | 3GB | 2GB | 4GB | |
| Internal storage | 32GB | 16GB | 64GB | |
| Expandable storage | Yes | Yes | Yes | |
| Expandable storage type | microSD | microSD | microSD | |
| Expandable storage up to (GB) | 256 | 128 | 128 | |
| camera | ||||
| Rear camera | 12-megapixel | 13-megapixel (f/2.2) | 13-megapixel (f/2.0, 1.12-micron) | |
| Rear flash | LED | Dual LED | Dual LED | |
| Front camera | 16-megapixel | 5-megapixel (f/2.2) | 5-megapixel (f/2.0) | |
| Front flash | Yes | - | - | |
| Rear autofocus | - | - | Phase detection autofocus | |
| software | ||||
| Operating system | Android 8.1 Oreo | Android 6.0 | Android 6.0 | |
| Skin | MIUI 9 | MIUI 8 | MIUI 8 | |
| connectivity | ||||
| Wi-Fi | Yes | Yes | Yes | |
| Wi-Fi standards supported | 802.11 b/g/n | 802.11 a/b/g/n | 802.11 a/b/g/n | |
| GPS | Yes | Yes | Yes | |
| Bluetooth | Yes, v 4.20 | Yes, v 4.10 | Yes, v 4.10 | |
| Infrared | Yes | Yes | Yes | |
| Number of SIMs | 2 | 2 | 2 | |
| NFC | - | No | No | |
| USB OTG | - | Yes | Yes | |
| Headphones | - | 3.5mm | 3.5mm | |
| FM | - | Yes | Yes | |
| Wi-Fi Direct | - | Yes | No | |
| Mobile High-Definition Link (MHL) | - | No | No | |
| Micro-USB | - | - | Yes | |
| sim 1 | ||||
| SIM Type | Nano-SIM | Micro-SIM | Micro-SIM | |
| GSM/CDMA | GSM | GSM | GSM | |
| 3G | Yes | Yes | Yes | |
| 4G/ LTE | Yes | Yes | Yes | |
| sim 2 | ||||
| SIM Type | Nano-SIM | Nano-SIM | Nano-SIM | |
| GSM/CDMA | GSM | GSM | GSM | |
| 3G | Yes | Yes | Yes | |
| 4G/ LTE | Yes | Yes | Yes | |
| sensors | ||||
| 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 | |
| Fingerprint sensor | - | - | Yes | |
| ratings | ||||
| Overall NDTV Rating | - | Read Review | Read Review | |
| Design Rating | - | |||
| Display Rating | - | |||
| Software Rating | - | |||
| Performance Rating | - | |||
| Battery Life Rating | - | |||
| Camera Rating | - | |||
| Value for Money Rating | - | |||
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