| ratings | 
| Overall NDTV Rating | Read Review | - | 
| Design Rating |  | - | 
| Display Rating |  | - | 
| Software Rating |  | - | 
| Performance Rating |  | - | 
| Battery Life Rating |  | - | 
| Camera Rating |  | - | 
| Value for Money Rating |  | - | 
| key specs | 
| Display | 6.20-inch | 6.20-inch | 
| Processor | Samsung Exynos 2100 | Samsung Exynos 990 | 
| Front Camera | 10-megapixel  | 10-megapixel  | 
| Rear Camera | 12-megapixel + 12-megapixel + 64-megapixel  | 12-megapixel + 64-megapixel + 12-megapixel  | 
| RAM | 8GB | 8GB | 
| Storage | 128GB, 256GB | 128GB | 
| Battery Capacity | 4000mAh | 4000mAh | 
| OS | Android 11 | Android 10 | 
| Resolution | 1080x2400 pixels | 1440x3200 pixels | 
| general | 
| Brand | Samsung | Samsung | 
| Model | Galaxy S21 | Galaxy S20 | 
| Release date | January 14, 2021 | February 11, 2020 | 
| Form factor | Touchscreen | Touchscreen | 
| Dimensions (mm) | 151.70 x 71.20 x 7.90 | 151.70 x 69.10 x 7.90 | 
| Weight (g) | 171.00 | 163.00 | 
| IP rating | IP68 | IP68 | 
| Battery capacity (mAh) | 4000 | 4000 | 
| Fast charging | Proprietary | Proprietary | 
| Wireless charging | Yes | Yes | 
| Colours | Phantom Violet | Cloud Blue, Cloud Pink, Cosmic Grey, | 
| Body type | - | Glass | 
| Removable battery | - | No | 
| display | 
| Screen size (inches) | 6.20 | 6.20 | 
| Touchscreen | Yes | Yes | 
| Resolution | 1080x2400 pixels | 1440x3200 pixels | 
| Protection type | Gorilla Glass | - | 
| Aspect ratio | 20:9 | 20:9 | 
| Pixels per inch (PPI) | 421 | - | 
| hardware | 
| Processor | 2.2GHz octa-core (3x2.8GHz + 4x2.2GHz + 1x2.9GHz) | 2GHz octa-core (2x2.73GHz + 2x2.5GHz + 4x2GHz) | 
| Processor make | Samsung Exynos 2100 | Samsung Exynos 990 | 
| RAM | 8GB | 8GB | 
| Internal storage | 128GB, 256GB | 128GB | 
| Expandable storage | - | Yes | 
| Expandable storage type | - | microSD | 
| Expandable storage up to (GB) | - | 1000 | 
| Dedicated microSD slot | - | No | 
| camera | 
| Rear camera | 12-megapixel (f/1.8, 1.8-micron) + 12-megapixel (f/2.2, 1.4-micron) + 64-megapixel (f/2.0, 0.8-micron) | 12-megapixel (f/1.8) + 64-megapixel (f/2.0) + 12-megapixel (f/2.2) | 
| No. of Rear Cameras | 3 | - | 
| Rear autofocus | Yes | Yes | 
| Rear flash | Yes | Dual LED | 
| Front camera | 10-megapixel (f/2.2, 1.22-micron) | 10-megapixel (f/2.2) | 
| No. of Front Cameras | 1 | - | 
| Front autofocus | - | Yes | 
| software | 
| Operating system | Android 11 | Android 10 | 
| Skin | One UI 3.1 | One UI 2.0 | 
| 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 5.00 | Yes, v 5.00 | 
| NFC | Yes | Yes | 
| USB Type-C | Yes | Yes | 
| Number of SIMs | 2 | 2 | 
| Headphones | - | Type-C | 
| Active 4G on both SIM cards | - | Yes | 
| sim 1 | 
| SIM Type | Nano-SIM | Nano-SIM | 
| GSM/CDMA | GSM | GSM | 
| 3G | Yes | Yes | 
| 4G/ LTE | Yes | Yes | 
| 5G | Yes | - | 
| sim 2 | 
| SIM Type | Nano-SIM | Nano-SIM | 
| GSM/CDMA | GSM | GSM | 
| 3G | Yes | Yes | 
| 4G/ LTE | Yes | - | 
| 5G | Yes | - | 
| sensors | 
| Face unlock | Yes | Yes | 
| 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 | 
| Barometer | Yes | Yes |