Phone Comparison - Oppo A31 vs Samsung Galaxy M21 vs Huawei nova 7 SE
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| Manufacturer | Oppo | Samsung | Huawei |
| Announced | February 2020 | 2020, March 18 | April 2020 |
| Status | Available - February 2020 | Coming soon. Exp. release 2020, March 23 | Coming Soon - April 2020 |
| Price | Rs. 11,490 ($0.00) [Similarly Priced] | Rs. 12,999 ($0.00) [Similarly Priced] | - |
| Colors | Fantasy White, Mystery Black | Midnight Blue, Raven Black | Black, Purple, Green, Blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
163.9 x 75.5 x 8.3 mm (6.45 x 2.97 x 0.33 in) |
159 x 75.1 x 8.9 mm (6.26 x 2.96 x 0.35 in) |
162.3 x 75 x 8.6 mm (6.39 x 2.95 x 0.34 in) |
| Weight | 180 g (6.35 oz) | 188 g (6.63 oz) | 189 g (6.67 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 CDMA 800 & TD-SCDMA |
| 3G Network | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE (unspecified) | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500) | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 6(900), 8(900), 18(800), 19(800), 26(850) |
| 5G Network | - | - | 5G band 1,3,41,78,79 SA/NSA |
| Messaging | |||
| Build Features | - Fingerprint Sensor |
- Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) |
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| OS | Android 9.0 (Pie) | Android 10.0 | Android 10.0 (AOSP + HMS) |
| User Interface | ColorOS 6.1 | One UI 2.0 | EMUI 10.1 |
| Processor | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765V/CB Helio P35 (12nm) | Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm) | Octa-core (1x2.36 GHz Cortex-A76 & 3x2.22 GHz Cortex-A76 & 4x1.84 GHz Cortex-A55), HiSilicon Kirin 820 5G (7nm) |
| GPU | PowerVR GE8320 | Mali-G72 MP3 | Mali-G57 (6-core) |
| RAM | 4 GB | 6 GB | 8 GB |
| Internal Memory | 128 GB | 128 GB | 256 GB |
| External Memory | microSDXC (dedicated slot) | microSDXC (dedicated slot) | NM (Nano Memory), up to 256GB (uses shared SIM slot) |
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| Type | IPS LCD Capacitive Touchscreen | Super AMOLED Capacitive Touchscreen Corning Gorilla Glass 3 420 nits max brightness (advertised) |
LTPS IPS LCD Capacitive Touchscreen HDR10 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.5 inches | 6.4 inches | 6.5 inches |
| Resolution | 720 x 1600 pixels (270 ppi) | 1080 x 2340 pixels (403 ppi) | 1080 x 2400 pixels (405 ppi) |
| Screen-to-Body Ratio | 82.39% | 84.07% | 83.76% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio, RDS, recording | - |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 12 MP + 2 MP + 2 MP | 48 MP + 8 MP + 5 MP | 64 MP + 8 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED flash |
| Features | 12 MP, f/1.8, (wide), PDAF 2 MP, f/2.4, 27mm (macro), 1/5.0", 1.75µm 2 MP, f/2.4, (depth) HDR, Panorama |
48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.2, (depth) Panorama, HDR |
64 MP, f/1.8, 26mm (wide), PDAF 8 MP, f/2.4, 17mm (ultrawide) 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) Panorama, HDR |
| Video | 1080p@30fps | 2160p@30fps, 1080p@30fps, gyro-EIS | 2160p, 1080p, 720p@960fps |
| Front Camera | 8 MP, f/2.0, HDR, 1080p@30fps [Similar] |
20 MP, f/2.0, (wide), 1/2.8", 1.0μm HDR 1080p@30fps [Similar] |
16 MP, f/2.0, 26mm (wide), 1/3.1", 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, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A, 5G |
| Bluetooth | 5.0, A2DP, LE | 5.0, 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 | microUSB 2.0, USB On-The-Go | 2.0, Type-C 1.0 reversible connector | 2.0, Type-C 1.0 reversible connector, USB On-The-Go |
| GPS | Yes, with A-GPS, BDS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 4 GB RAM | 128 GB, 6 GB RAM or 64 GB, 4 GB RAM (UFS 2.1) | 256 GB, 8 GB RAM or 128 GB, 8 GB RAM |
| Expandable Storage | microSDXC (dedicated slot) | microSDXC (dedicated slot) | NM (Nano Memory), up to 256GB (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 | Non-removable Li-Po Battery Fast battery charging 15W |
Non-removable Li-Po Battery Fast charging 40W, 70% in 30 min (advertised) Reverse charging 5W |
| Capacity | 4230 mAh | 6000 mAh | 4000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
