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| key specs | ||||
| Display | 6.22-inch | 4.70-inch | ||
| Processor | MediaTek Helio P22 | Qualcomm Snapdragon 410 | ||
| Front Camera | 5-megapixel | 2-megapixel | ||
| Rear Camera | 13-megapixel | 8-megapixel | ||
| RAM | 2GB | 1GB | ||
| Storage | 16GB | 8GB | ||
| Battery Capacity | 4030mAh | 2200mAh | ||
| OS | Android 8.1 | Android 4.4 | ||
| Resolution | 720x1520 pixels | 720x1280 pixels | ||
| general | ||||
| Brand | Vivo | Xiaomi | ||
| Model | Y91i | Redmi 2 | ||
| Release date | March 1, 2019 | January 1, 2015 | ||
| Launched in India | Yes | - | ||
| Form factor | Touchscreen | Touchscreen | ||
| Dimensions (mm) | 155.11 x 75.09 x 8.28 | 134.00 x 67.20 x 9.40 | ||
| Weight (g) | 163.50 | 133.00 | ||
| Battery capacity (mAh) | 4030 | 2200 | ||
| Colours | Fusion Black, Ocean Blue | White, Black, Yellow, Pink, Green | ||
| Removable battery | - | Yes | ||
| display | ||||
| Screen size (inches) | 6.22 | 4.70 | ||
| Touchscreen | Yes | Yes | ||
| Resolution | 720x1520 pixels | 720x1280 pixels | ||
| Aspect ratio | 19:9 | - | ||
| Pixels per inch (PPI) | - | 312 | ||
| hardware | ||||
| Processor | octa-core | 1.2GHz quad-core | ||
| Processor make | MediaTek Helio P22 (MT6762) | Qualcomm Snapdragon 410 | ||
| RAM | 2GB | 1GB | ||
| Internal storage | 16GB | 8GB | ||
| Expandable storage | Yes | Yes | ||
| Expandable storage type | microSD | microSD | ||
| Expandable storage up to (GB) | - | 32 | ||
| camera | ||||
| Rear camera | 13-megapixel (f/2.2) | 8-megapixel | ||
| Rear autofocus | Yes | - | ||
| Rear flash | Yes | Yes | ||
| Front camera | 5-megapixel (f/1.8) | 2-megapixel | ||
| software | ||||
| Operating system | Android 8.1 | Android 4.4 | ||
| Skin | Funtouch OS 4.5 | MIUI 6 | ||
| connectivity | ||||
| Wi-Fi | Yes | Yes | ||
| GPS | Yes | Yes | ||
| Bluetooth | Yes, v 5.00 | Yes, v 4.00 | ||
| USB OTG | Yes | Yes | ||
| Micro-USB | Yes | - | ||
| Headphones | 3.5mm | 3.5mm | ||
| FM | Yes | Yes | ||
| Number of SIMs | 2 | 2 | ||
| Wi-Fi standards supported | - | 802.11 b/g/n | ||
| NFC | - | No | ||
| Infrared | - | No | ||
| Wi-Fi Direct | - | No | ||
| Mobile High-Definition Link (MHL) | - | No | ||
| sim 1 | ||||
| SIM Type | Nano-SIM | Micro-SIM | ||
| GSM/CDMA | GSM | GSM | ||
| 3G | Yes | Yes | ||
| 4G/ LTE | Yes | Yes | ||
| sim 2 | ||||
| SIM Type | Nano-SIM | Micro-SIM | ||
| GSM/CDMA | GSM | GSM | ||
| 3G | Yes | Yes | ||
| 4G/ LTE | Yes | Yes | ||
| sensors | ||||
| Face unlock | Yes | - | ||
| Fingerprint sensor | No | - | ||
| Compass/ Magnetometer | Yes | Yes | ||
| Proximity sensor | Yes | Yes | ||
| Accelerometer | Yes | Yes | ||
| Ambient light sensor | Yes | Yes | ||
| Gyroscope | Yes | Yes | ||
| Barometer | - | No | ||
| Temperature sensor | - | No | ||
| ratings | ||||
| Overall NDTV Rating | - | Read Review | ||
| Design Rating | - | |||
| Display Rating | - | |||
| Software Rating | - | |||
| Performance Rating | - | |||
| Battery Life Rating | - | |||
| Camera Rating | - | |||
| Value for Money Rating | - | |||