Phone Comparison - Oppo A91 vs Samsung Galaxy A21s vs Samsung Galaxy A12
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| Manufacturer | Oppo | Samsung | Samsung |
| Announced | 2019, December | Expected Announcement - May 2020 | 2020, November 24 |
| Status | Coming soon. Exp. release 2019, December 26 | Rumored | Coming Soon - January 2021 |
| Price | - | - | Rs. 12,999 ($0.00) [Similarly Priced] |
| Colors | Black, Blue, Red | Black, White, Blue | Black, White, Blue, Red |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
7.9 mm thickness (0.31 in thickness) |
8.9 mm thickness (0.35 in thickness) |
164 x 75.8 x 8.9 mm (6.46 x 2.98 x 0.35 in) |
| Weight | 172 g (6.07 oz) | 191 g (6.74 oz) | 205 g (7.23 oz) |
| SIM Type | Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) | Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM only) |
| 3G Network | HSDPA 850 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | LTE | LTE (unspecified) |
| Messaging | |||
| Build Features | - Fingerprint Sensor(In-display) |
- Fingerprint Sensor |
- Fingerprint Sensor (side-mounted) |
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| OS | Android 9.0 (Pie) | Android 10.0 | Android 10 |
| User Interface | ColorOS 6.1 | One UI 2.0 | - |
| Processor | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53), Mediatek MT6771V Helio P70 (12nm) | Octa-core 2.0 GHz, Exynos 850 | Octa-core (2.3 GHz, 1.8 GHz) |
| GPU | Mali-G72 MP3 | - | - |
| RAM | 8 GB | 3 GB | 4 GB |
| Internal Memory | 128 GB | 64 GB | 128 GB |
| External Memory | microSD, up to 256 GB (dedicated slot) | microSDXC | microSDXC |
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| Type | Super AMOLED Capacitive Touchscreen | PLS TFT Capacitive Touchscreen | HD+ TFT display |
| Colors | 16M colors | 16M colors | 16M Colour |
| Size | 6.4 inches | 6.55 inches | 6.5 inches |
| Resolution | 1080 x 2340 pixels (403 ppi) | 720 x 1600 pixels (268 ppi) | 720 x 1560 pixels (264 ppi) |
| Screen-to-Body Ratio | - | - | 83.64% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | - | Unspecified |
| 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 | 48 MP + 5 MP + 2 MP + 2 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, 1/5", 1.75µm (dedicated macro camera) 2 MP, f/2.4, 1/5", 1.75µm, depth sensor 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 |
48 MP, f/2.0, (wide), AF 5 MP, f/2.2, 115˚ (ultrawide) 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) panorama, HDR |
| Video | 2160p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera |
16 MP, f/2.0, 26mm (wide), 1/3.1", 1.0µm HDR 1080p@30fps [Similar] |
13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm HDR, Panorama 1080p@30fps [Similar] |
8 MP, f/2.2 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/11.5 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE-A | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | 5.0, A2DP, LE, aptX HD | 5.0, A2DP, LE | Yes |
| 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 | Yes |
| USB | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | Yes | USB Type-C 2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 128 GB, 8 GB RAM | 64 GB, 3 GB RAM or 32 GB, 3 GB RAM | 128 GB, 4 GB RAM or 64 GB, 4 GB RAM or 64 GB, 3 GB RAM or 32 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 256 GB (dedicated slot) | microSDXC | microSDXC |
| USB OTG | Supported | Supported | Not 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 30W |
Non-removable Li-Po Battery Battery Charging 10W |
Non-removable Li-Po Battery Fast battery charging 15W |
| Capacity | 4000 mAh | 5000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
