Phone Comparison - Xiaomi Redmi Note 9 vs Samsung Galaxy A21s vs Samsung Galaxy M31s
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| Manufacturer | Xiaomi | Samsung | Samsung |
| Announced | 2020, April 30 | Expected Announcement - May 2020 | Not announced yet |
| Status | Coming soon. Exp. release 2020, May | Rumored | Rumored |
| Colors | Forest Green, Midnight Grey, Polar White | Black, White, Blue | Ocean Blue, Space Black, Red |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
162.3 x 77.2 x 8.9 mm (6.39 x 3.04 x 0.35 in) |
8.9 mm thickness (0.35 in thickness) |
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| Weight | 199 g (7.02 oz) | 191 g (6.74 oz) | - |
| SIM Type | Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 25(1900), 2628, 32(1500), 38(2600), 39(1900), 40(2300), 41(2500) | LTE | LTE |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor |
- Fingerprint Sensor |
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| OS | Android 10.0 | Android 10.0 | Android 10 |
| User Interface | MIUI 11 | One UI 2.0 | One UI 2.0 |
| Processor | Octa-core (2x Cortex-A75 @ 2 GHz, 6x Cortex-A55 @ 2 GHz), MediaTek Helio G85 (12nm) | Octa-core 2.0 GHz, Exynos 850 | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) |
| GPU | Mali-G52 MC2 | - | Mali-G72 MP3 |
| RAM | 4 GB | 3 GB | 8 GB |
| Internal Memory | 128 GB | 64 GB | 128 GB |
| External Memory | microSDXC (dedicated slot) | microSDXC | No |
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| Type | FHD+ IPS LCD Capacitive Touchscreen | PLS TFT Capacitive Touchscreen | Super AMOLED Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.53 inches | 6.55 inches | 6.5 inches |
| Resolution | 1080 x 2340 pixels (395 ppi) | 720 x 1600 pixels (268 ppi) | 1080 x 2400 pixels (405 ppi) |
| Screen-to-Body Ratio | 83.40% | - | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio, recording | - | FM radio, RDS, recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 48 MP + 8 MP + 2 MP + 2 MP | 48 MP + 8 MP + 2 MP | 64 MP + 12 MP + 5 MP + 5 MP |
| Flash | LED flash | LED Flash | LED Flash |
| Features | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro), AF 2 MP, f/2.4, (depth) HDR, Panorama |
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.4, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) Panorama, HDR |
64 MP, f/1.8, 26mm (wide), 1/1.72", 0.8µm, PDAF 12 MP, f/2.2, (ultrawide) 5 MP, f/2.4, (macro) 5 MP, f/2.4, (depth) Panorama, HDR |
| Video | 1080p@30fps | 1080p@30fps | 4K@30fps, 1080p@30fps, gyro-EIS |
| Front Camera |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm HDR 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| USB | 2.0, Type-C 1.0 reversible connector | Yes | 2.0, Type-C 1.0 reversible connector |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 4 GB RAM or 64 GB, 3 GB RAM | 64 GB, 3 GB RAM or 32 GB, 3 GB RAM | 128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.1) |
| Expandable Storage | microSDXC (dedicated slot) | microSDXC | No |
| USB OTG | Supported | Supported | Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| Magnetic-Field Sensor (Compass) | |
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| Gyroscope Sensor | |
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| NFC | |
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| Type | Non-removable Li-Po Battery Fast battery charging 18W |
Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Fast battery charging 25W |
| Capacity | 5020mAh | 5000 mAh | 6000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
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