Phone Comparison - Samsung Galaxy A21s vs Xiaomi Redmi Note 9 5G vs Realme 7 5G
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| Manufacturer | Samsung | Xiaomi | Realme |
| Announced | Expected Announcement - May 2020 | Not announced yet | 2020, November 19 |
| Status | Rumored | Rumored | Coming soon. Exp. release 2020, November 27 |
| Colors | Black, White, Blue | Blue; other colours | Blue, Silver, Mint |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
8.9 mm thickness (0.35 in thickness) |
162 x 77.2 x 9.2 mm (6.38 x 3.04 x 0.36 in) |
162.1 x 75.1 x 9.1 mm (6.38 x 2.96 x 0.36 in) |
| Weight | 191 g (6.74 oz) | 200 g (7.05 oz) | 195 g (6.88 oz) |
| SIM Type | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | 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 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE | 1, 2, 3, 4, 5, 7, 8, 34, 38, 39, 40, 41 | LTE |
| 5G Network | - | 1, 3, 41, 78, 79 SA/NSA/Sub6 | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) |
- Fingerprint Sensor (side-mounted) |
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| OS | Android 10.0 | Android 10 | Android 10 |
| User Interface | One UI 2.0 | MIUI 12 | Realme UI 1.0 |
| Processor | Octa-core 2.0 GHz, Exynos 850 | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), MediaTek Dimensity 800U 5G (7 nm) | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), MediaTek Dimensity 800U 5G (7 nm) |
| GPU | - | Mali-G57 MC3 | Mali-G57 MC3 |
| RAM | 3 GB | 8 GB | 8 GB |
| Internal Memory | 64 GB | 256 GB | 128 GB |
| External Memory | microSDXC | microSDXC | microSDXC (uses shared SIM slot) |
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| Type | PLS TFT Capacitive Touchscreen | IPS LCD Screen Corning Gorilla Glass 5 450 nits (typ) |
IPS LCD Display 120Hz Refresh rate 480 nits (typ) Corning Gorilla Glass Protection |
| Colors | 16M colors | 16M Colour | 16M Colour |
| Size | 6.55 inches | 6.53 inches | 6.5 inches |
| Resolution | 720 x 1600 pixels (268 ppi) | 1080 x 2400 pixels (403 ppi) | 1080 x 2400 pixels (405 ppi) |
| Screen-to-Body Ratio | - | 82.33% | 83.75% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | Unspecified | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 48 MP + 8 MP + 2 MP | 48 MP + 8 MP + 2 MP | 48 MP + 8 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | 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 |
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (depth) HDR, Panorama |
48 MP, f/1.8, 25mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.3, 119˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama |
| Video | 1080p@30fps | 1080p@30fps | 4K@30fps, 1080p@30/60/120fps; 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] |
16 MP, f/2.1, 26mm (wide), 1/3.06", 1.0µm 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, 5G | HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G 2.3 Gbps DL |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | 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 | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| USB | Yes | USB Type-C 2.0 | USB Type-C 2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 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 | 128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.1) |
| Expandable Storage | microSDXC | 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 Battery Charging 10W |
Non-removable Li-Po Battery Fast battery charging 18W |
Non-removable Li-Po Battery Fast battery charging 30W, 100% in 65 min (advertised) |
| Capacity | 5000 mAh | 5000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
