Phone Comparison - Samsung Galaxy M21 vs Samsung Galaxy A21s vs Xiaomi Redmi Note 9 Pro 5G
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| Manufacturer | Samsung | Samsung | Xiaomi |
| Announced | 2020, March 18 | Expected Announcement - May 2020 | 2020, November 26 |
| Status | Coming soon. Exp. release 2020, March 23 | Rumored | Coming soon. Exp. release 2020, December |
| Price | Rs. 12,999 ($0.00) [Similarly Priced] | - | - |
| Colors | Midnight Blue, Raven Black | Black, White, Blue | Gray, Blue, Red/Mint |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
159 x 75.1 x 8.9 mm (6.26 x 2.96 x 0.35 in) |
8.9 mm thickness (0.35 in thickness) |
165.4 x 76.8 x 9 mm (6.51 x 3.02 x 0.35 in) |
| Weight | 188 g (6.63 oz) | 191 g (6.74 oz) | 215 g (7.58 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 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500) | LTE | 1, 3, 5, 7, 8, 34, 38, 39, 40, 41 |
| 5G Network | - | - | 1, 3, 41, 78, 79 SA/NSA/Sub6 |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) |
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| OS | Android 10.0 | Android 10.0 | Android 10 |
| User Interface | One UI 2.0 | One UI 2.0 | MIUI 12 |
| Processor | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) | Octa-core 2.0 GHz, Exynos 850 | Octa-core (2x2.2 GHz Kryo 570 & 6x1.8 GHz Kryo 570), Qualcomm SM7225 Snapdragon 750G 5G (8 nm) |
| GPU | Mali-G72 MP3 | - | Adreno 619 |
| RAM | 6 GB | 3 GB | 8 GB |
| Internal Memory | 128 GB | 64 GB | 256 GB |
| External Memory | microSDXC (dedicated slot) | microSDXC | microSDXC (uses shared SIM slot) |
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| Type | Super AMOLED Capacitive Touchscreen Corning Gorilla Glass 3 420 nits max brightness (advertised) |
PLS TFT Capacitive Touchscreen | IPS LCD Screen Corning Gorilla Glass 5 120Hz Refesh Rate HDR10 450 nits (typ) |
| Colors | 16M colors | 16M colors | 16M Colour |
| Size | 6.4 inches | 6.55 inches | 6.67 inches |
| Resolution | 1080 x 2340 pixels (403 ppi) | 720 x 1600 pixels (268 ppi) | 1080 x 2400 pixels (395 ppi) |
| Screen-to-Body Ratio | 84.07% | - | 84.37% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio, RDS, recording | - | Unspecified |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 48 MP + 8 MP + 5 MP | 48 MP + 8 MP + 2 MP | 108 MP + 8 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | Dual-LED dual-tone flash |
| Features | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.2, (depth) Panorama, HDR |
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 |
108 MP, f/1.75, 26mm (wide), 1/1.52", 0.8µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama |
| Video | 2160p@30fps, 1080p@30fps, gyro-EIS | 1080p@30fps | 4K@30fps, 1080p@30fps |
| Front Camera |
20 MP, f/2.0, (wide), 1/2.8", 1.0μm HDR 1080p@30fps [Similar] |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
16 MP, f/2.0 HDR, panorama 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A, 5G |
| 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 | USB Type-C 2.0 |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 6 GB RAM or 64 GB, 4 GB RAM (UFS 2.1) | 64 GB, 3 GB RAM or 32 GB, 3 GB RAM | 256 GB, 8 GB RAM or 128 GB, 8 GB RAM or 128 GB, 6 GB RAM UFS 2.2 |
| Expandable Storage | microSDXC (dedicated slot) | microSDXC | microSDXC (uses shared SIM slot) |
| 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 15W |
Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Fast battery charging 33W |
| Capacity | 6000 mAh | 5000 mAh | 4820 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
