| Samsung Galaxy S21 |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Operating system | Android v10 (Q) | Android 10.0; MIUI 11 |
| Processor | Octa core (2.73 GHz, Dual core, M5 Mongoose 2.5 GHz, Dual core, Cortex A76 2 GHz, Quad core, Cortex A55) | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Custom UI | Samsung One UI | |
| Chipset | Samsung Exynos 9 Octa 990 | Qualcomm SM7125 Snapdragon 720G (8 nm) |
| GPU | Adreno 618 | |
| Internal memory | 256 GB | 64GB 4GB RAM, 128GB 6GB RAM |
| Architecture | 64 bit | |
| External memory | microSDXC (dedicated slot) | |
| RAM | 12 GB | |
| Expandable Memory | yes Up to 1 TB | |
| Graphics | Mali-G77 MP11 | |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| Display | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Type | IPS LCD | |
| Size | 6.67" inc | |
| Resolution | 1080 x 2400 px | |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | capacitive touchscreen | |
| Screen Size | 6.2 inches (15.75 cm) | |
| Screen-to-Body Ratio | 84.5% | |
| Screen Resolution | 1440 x 3200 pixels | |
| Display area | 107.4 cm2 | |
| Display Type | OLED | |
| Display aspect ratio | 20:9 (height:width) | |
| Pixel Density | 566 ppi | 395 PPI |
| Screen Protection | Corning Gorilla Glass v6 | |
| Colors | 16M | |
| Touch Screen | yes Capacitive Touchscreen, Multi-touch | |
| Other | 450 nits typ. brightness (advertised) | |
| Main Camera | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Resolution | 16 MP Primary Camera 64 MP Telephoto Camera 12 MP, Wide Angle, Ultra-Wide Angle Camera | |
| Image Resolution | 4616 x 3464 Pixels | |
| Flash | yes LED Flash | |
| Camera Features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Autofocus | yes Phase Detection autofocus | |
| Optical Image Stabilisation | yes | |
| Shooting Modes | Continuos Shooting, High Dynamic Range mode (HDR) | |
| Settings | Exposure compensation, ISO control | |
| Connectivity | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) | |
| Wi-Fi | yes Wi-Fi 802.11, b/g/n | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | 4G: Available , 3G: Available, 2G: Available | GSM / HSPA / LTE |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | yes v5.0 | 5.0, A2DP, LE |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | yes with A-GPS, Glonass | Yes, with A-GPS, GLONASS, GALILEO, BDS, NavIC |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |
| USB | 2.0, Type-C 1.0 reversible connector | |
| SIM Size | SIM1: Nano, SIM2: Nano (Hybrid) | |
| NFC | yes | |
| VoLTE | yes | |
| Wi-Fi Features | Mobile Hotspot | |
| USB Connectivity | Mass storage device, USB charging | |
| Front Camera | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Resolution | 12 MP Primary Camera | |
| Camera Type | Under display | |
| Camera | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Main camera | 48 MP, Quad | |
| Specs | 48 MP, f/1.8, (wide), 1/2.25", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm -5 MP, f/2.4, (macro), 1.12µm -2 MP, f/2.4, (depth) | |
| Features | LED flash, HDR, panorama | |
| Video | 2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS | |
| Selfie camera | 16 MP, Single | |
| Multimedia | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Audio Jack | 3.5 mm | |
| 3.5 mm Jack | Yes | |
| Loudspeaker | yes | |
| Radio | FM radio, recording | |
| Design | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Height | 151.7 mm | |
| Colors | Aurora Blue, Glacier White, Interstellar Black | |
| Width | 71.2 mm | |
| Body build | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame | |
| Thickness | 7.9 mm | |
| Dimensions | 165.8 x 76.7 x 8.8 mm | |
| Ruggedness | Dust proof | |
| Weight | 209 g | |
| Waterproof | yes Water resistant, IP68 | |
| Battery | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Type | Li-ion | |
| Capacity | 3880 mAh | |
| User Replaceable | No | |
| Quick Charging | yes Fast | |
| USB Type-C | yes | |
| Wireless Charging | yes | |
| Other | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Release date | 2020, March 12 | |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port | |
| Features | Samsung Galaxy S21 | Xiaomi Redmi Note 9 Pro |
| Fingerprint Sensor | yes | |
| Fingerprint Sensor Position | On-screen | |
| Other Sensors | Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope |
