OnePlus X vs OnePlus 2 vs Xiaomi Mi 4i vs OnePlus One comparison
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| ratings |
| Overall NDTV Rating | Read Review | Read Review | Read Review | Read Review |
| Design Rating | | | | |
| Display Rating | | | | |
| Software Rating | | | | |
| Performance Rating | | | | |
| Battery Life Rating | | | | |
| Camera Rating | | | | |
| Value for Money Rating | | | | |
| key specs |
| Display | 5.00-inch | 5.50-inch | 5.00-inch | 5.50-inch |
| Processor | Qualcomm Snapdragon 801 | Qualcomm Snapdragon 810 | Qualcomm Snapdragon 615 | Qualcomm Snapdragon 801 |
| Front Camera | 8-megapixel | 5-megapixel | 5-megapixel | 5-megapixel |
| Rear Camera | 13-megapixel | 13-megapixel | 13-megapixel | 13-megapixel |
| RAM | 3GB | 4GB | 2GB | 3GB |
| Storage | 16GB | 64GB | 16GB | 64GB |
| Battery Capacity | 2525mAh | 3300mAh | 3120mAh | 3100mAh |
| OS | Android 5.1.1 | OxygenOS 2.0 | Android 5.0.2 | CyanogenMod 11S |
| Resolution | 1080x1920 pixels | 1080x1920 pixels | 1080x1920 pixels | 1080x1920 pixels |
| general |
| Brand | OnePlus | OnePlus | Xiaomi | OnePlus |
| Model | X | 2 | Mi 4i | One |
| Release date | October 1, 2015 | July 1, 2015 | April 1, 2015 | April 1, 2014 |
| Form factor | Touchscreen | Touchscreen | Touchscreen | Touchscreen |
| Dimensions (mm) | 140.00 x 69.00 x 6.90 | 151.80 x 74.90 x 9.85 | 138.10 x 69.60 x 7.80 | 152.90 x 75.90 x 8.90 |
| Weight (g) | 138.00 | 175.00 | 130.00 | 162.00 |
| Battery capacity (mAh) | 2525 | 3300 | 3120 | 3100 |
| Removable battery | No | No | No | No |
| Colours | Onyx, Ceramic | Sandstone Black | Black, White, Orange, Light Blue, and Pink | Sandstone Black, Silk White |
| SAR value | 0.43 | - | - | - |
| Launched in India | - | - | - | Yes |
| display |
| Screen size (inches) | 5.00 | 5.50 | 5.00 | 5.50 |
| Touchscreen | Yes | Yes | Yes | Yes |
| Resolution | 1080x1920 pixels | 1080x1920 pixels | 1080x1920 pixels | 1080x1920 pixels |
| Pixels per inch (PPI) | 441 | - | 441 | 401 |
| Aspect ratio | - | - | - | 16:9 |
| hardware |
| Processor | 2.3GHz quad-core | 1.8GHz octa-core | 1.7GHz octa-core | 2.5GHz quad-core |
| Processor make | Qualcomm Snapdragon 801 | Qualcomm Snapdragon 810 | Qualcomm Snapdragon 615 | Qualcomm Snapdragon 801 |
| RAM | 3GB | 4GB | 2GB | 3GB |
| Internal storage | 16GB | 64GB | 16GB | 64GB |
| Expandable storage | Yes | No | No | No |
| Expandable storage type | microSD | - | - | - |
| Expandable storage up to (GB) | 128 | - | - | - |
| camera |
| Rear camera | 13-megapixel | 13-megapixel | 13-megapixel | 13-megapixel (f/2.0, 1.12-micron) |
| Rear flash | LED | Dual LED | Dual LED | Dual LED |
| Front camera | 8-megapixel | 5-megapixel | 5-megapixel | 5-megapixel (f/2.0) |
| Front flash | No | - | - | - |
| Rear autofocus | - | - | - | Yes |
| software |
| Operating system | Android 5.1.1 | OxygenOS 2.0 | Android 5.0.2 | CyanogenMod 11S |
| Skin | Oxygen OS 2.1 | - | MIUI 6 | - |
| connectivity |
| Wi-Fi | Yes | Yes | Yes | Yes |
| Wi-Fi standards supported | 802.11 b/g/n | 802.11 a/b/g/n/ac | 802.11 b/g/n/ac | 802.11 a/b/g/n/ac |
| GPS | Yes | Yes | Yes | Yes |
| Bluetooth | Yes, v 4.00 | Yes, v 4.10 | Yes, v 4.10 | Yes, v 4.00 |
| NFC | No | No | No | Yes |
| Infrared | No | No | No | No |
| USB OTG | Yes | Yes | Yes | No |
| Headphones | 3.5mm | 3.5mm | 3.5mm | 3.5mm |
| FM | Yes | No | Yes | No |
| Number of SIMs | 2 | 2 | 2 | 1 |
| Wi-Fi Direct | No | No | Yes | Yes |
| Mobile High-Definition Link (MHL) | No | No | No | No |
| Micro-USB | - | - | - | Yes |
| sim 1 |
| SIM Type | Nano-SIM | Nano-SIM | Micro-SIM | Micro-SIM |
| GSM/CDMA | GSM | GSM | GSM | GSM |
| 3G | Yes | Yes | Yes | Yes |
| 4G/ LTE | Yes | Yes | Yes | Yes |
| sim 2 |
| SIM Type | Nano-SIM | Nano-SIM | Micro-SIM | - |
| GSM/CDMA | GSM | GSM | GSM | - |
| 3G | Yes | Yes | Yes | - |
| 4G/ LTE | Yes | Yes | Yes | - |
| sensors |
| Compass/ Magnetometer | No | Yes | Yes | Yes |
| Proximity sensor | Yes | Yes | Yes | Yes |
| Accelerometer | Yes | Yes | Yes | Yes |
| Ambient light sensor | Yes | Yes | Yes | Yes |
| Gyroscope | Yes | Yes | Yes | Yes |
| Barometer | No | No | No | No |
| Temperature sensor | No | No | No | No |