Phone Comparison - Samsung Galaxy M31 vs Realme C21 vs Realme 8
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| Manufacturer | Samsung | realme | Realme |
| Announced | 2020, February 25 | 2021, March 05 | March 2021 |
| Status | Available. Released 2020, March 5 | Available. Released 2021, March 05 | Coming Soon - March 2021 |
| Price | Rs. 14,999 ($0.00) [Similarly Priced] | Rs. 8,999 ($0.00) [Similarly Priced] | Rs. 14,999 ($0.00) [Similarly Priced] |
| Colors | Ocean Blue, Space Black, Red | Cross Black, Cross Blue | Cyber Silver, Cyber Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
159.2 x 75.1 x 8.9 mm (6.27 x 2.96 x 0.35 in) |
165.2 x 76.4 x 8.9 mm (6.5 x 3.01 x 0.35 in) |
160.6 x 73.9 x 8 mm (6.32 x 2.91 x 0.31 in) |
| Weight | 191 g (6.74 oz) | 190 g (6.7 oz) | 177 g (6.24 oz) |
| SIM Type | 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 | 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 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500) | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 | 1, 3, 5, 8, 38, 40, 41 |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor (rear-mounted) |
- Fingerprint Sensor (under display, optical) |
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| OS | Android 10.0 | Android 10 | Android 11 |
| User Interface | One UI 2.0 | Realme UI 1.0 | realme UI 2.0 |
| Processor | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), MediaTek Helio G35 (12 nm) | Octa-core (2x2.05 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55), Mediatek Helio G95 (12 nm) |
| GPU | Mali-G72 MP3 | PowerVR GE8320 | Mali-G76 MC4 |
| RAM | 6 GB | 4 GB | 8 GB |
| Internal Memory | 128 GB | 64 GB | 128 GB |
| External Memory | microSD, up to 512 GB | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
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| Type | Full HD+ Infinity-U Super AMOLED Capacitive Touchscreen | HD+ IPS LCD Screen | Super AMOLED Screen 1000 nits (peak) Always-on display |
| Colors | 16M colors | 16M Colour | 16M Colour |
| Size | 6.4 inches | 6.5 inches | 6.4 inches |
| Resolution | 1080 x 2340 pixels (403 ppi) | 720 x 1600 pixels (270 ppi) | 1080 x 2400 pixels (411 ppi) |
| Screen-to-Body Ratio | 83.97% | 80.78% | 83.41% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Yes | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 64 MP + 8 MP + 5 MP + 5 MP | 13 MP + 2 MP + 2 MP | 64 MP + 8 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | 64 MP, f/1.8, 26mm (wide), 1/1.72", 0.8µm, PDAF 8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.2, 25mm (macro), 1/5.0", 1.12µm 5 MP, f/2.2, (depth) HDR, Panorama |
13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, panorama |
64 MP, f/1.8, 26mm (wide), 1/1.73", 0.8µm, PDAF 8 MP, f/2.3, 119˚, 16mm (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@30/60/120fps, gyro-EIS |
| Front Camera |
32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm HDR 1080p@30fps [Similar] |
5 MP, f/2.2, (wide), 1/5.0", 1.12µm HDR 1080p@30fps [Similar] |
16 MP, f/2.5, (wide), 1/3.0" 1.0µm HDR, panorama 1080p@30/120fps, gyro-EIS [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE-A | HSPA 42.2/5.76 Mbps, LTE | HSPA 42.2/5.76 Mbps, LTE-A |
| Bluetooth | 5.0, A2DP, LE | 5.1, A2DP, LE | 5.1, A2DP, LE |
| Wi-Fi | 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 | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| USB | 2.0, Type-C 1.0 reversible connector | microUSB 2.0, USB On-The-Go | USB Type-C 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, BDS |
| Browser | Yes | Yes | |
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| Internal | 128 GB, 6 GB RAM or 64 GB, 4 GB RAM | 64 GB, 4 GB RAM or 32 GB, 3 GB RAM eMMC 5.1 | 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 128 GB, 4 GB RAM UFS 2.1 |
| Expandable Storage | microSD, up to 512 GB | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
| USB OTG | Yes | 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 30W, 50% in 26 min, 100% in 65 min (advertised) VOOC 4.0 |
| Capacity | 6000 mAh | 5000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 14,999 
Rs. 8,999 
