| 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 | | |
| key specs |
| Display | 6.55-inch | 6.80-inch |
| Processor | Qualcomm Snapdragon 888 | Samsung Exynos 2100 |
| Front Camera | 16-megapixel | 40-megapixel |
| Rear Camera | 48-megapixel + 50-megapixel + 2-megapixel | 108-megapixel + 12-megapixel + 10-megapixel + 10-megapixel |
| RAM | 8GB, 12GB | 12GB, 16GB |
| Storage | 128GB, 256GB | 128GB, 256GB, 512GB |
| Battery Capacity | 4500mAh | 5000mAh |
| OS | Android 11 | Android 11 |
| Resolution | 1080x2400 pixels | 1440x3220 pixels |
| general |
| Brand | OnePlus | Samsung |
| Model | 9 | Galaxy S21 Ultra |
| Release date | March 23, 2021 | January 14, 2021 |
| Launched in India | Yes | - |
| Form factor | Touchscreen | Touchscreen |
| Dimensions (mm) | 160.00 x 73.90 x 8.10 | 165.10 x 75.60 x 8.90 |
| Weight (g) | 183.00 | 228.00 |
| Battery capacity (mAh) | 4500 | 5000 |
| Fast charging | Proprietary | Proprietary |
| Colours | Arctic Sky, Winter Mist, Stellar Black | Phantom Titanium, Phantom Navy, Phantom Brown |
| IP rating | - | IP68 |
| Wireless charging | - | Yes |
| display |
| Screen size (inches) | 6.55 | 6.80 |
| Touchscreen | Yes | Yes |
| Resolution | 1080x2400 pixels | 1440x3220 pixels |
| Protection type | Gorilla Glass | Gorilla Glass |
| Aspect ratio | 20:9 | - |
| Pixels per inch (PPI) | 402 | 515 |
| hardware |
| Processor | octa-core | 2.2GHz octa-core (3x2.8GHz + 4x2.2GHz + 1x2.9GHz) |
| Processor make | Qualcomm Snapdragon 888 | Samsung Exynos 2100 |
| RAM | 8GB, 12GB | 12GB, 16GB |
| Internal storage | 128GB, 256GB | 128GB, 256GB, 512GB |
| camera |
| Rear camera | 48-megapixel (f/1.8, 1.12-micron) + 50-megapixel (f/2.2) + 2-megapixel | 108-megapixel (f/1.8, 0.8-micron) + 12-megapixel (f/2.2, 1.4-micron) + 10-megapixel (f/2.4, 1.22-micron) + 10-megapixel (f/4.9, 1.22-micron) |
| No. of Rear Cameras | 3 | - |
| Rear autofocus | Yes | Laser autofocus |
| Rear flash | Yes | Yes |
| Front camera | 16-megapixel (f/2.4, 1.0-micron) | 40-megapixel (f/2.2, 0.7-micron) |
| No. of Front Cameras | 1 | - |
| software |
| Operating system | Android 11 | Android 11 |
| Skin | OxygenOS 11 | One UI 3.1 |
| connectivity |
| Wi-Fi | Yes | Yes |
| Wi-Fi standards supported | 802.11 a/b/g/n/ac/ax | 802.11 a/b/g/n/ac/ax |
| GPS | Yes | Yes |
| Bluetooth | Yes, v 5.20 | Yes, v 5.00 |
| NFC | Yes | Yes |
| USB Type-C | Yes | Yes |
| Number of SIMs | 2 | 2 |
| sim 1 |
| SIM Type | Nano-SIM | Nano-SIM |
| GSM/CDMA | GSM | GSM |
| 3G | Yes | Yes |
| 4G/ LTE | Yes | Yes |
| 5G | Yes | Yes |
| sim 2 |
| SIM Type | Nano-SIM | Nano-SIM |
| GSM/CDMA | GSM | GSM |
| 3G | Yes | Yes |
| 4G/ LTE | Yes | Yes |
| 5G | - | Yes |
| sensors |
| In-Display Fingerprint Sensor | Yes | Yes |
| Compass/ Magnetometer | Yes | Yes |
| Proximity sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| Ambient light sensor | Yes | Yes |
| Gyroscope | Yes | Yes |
| Face unlock | - | Yes |
| Barometer | - | Yes |