Phone Comparison - Oppo A15s vs Xiaomi Redmi 9T vs Realme C21
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| Manufacturer | Oppo | Xiaomi | realme |
| Announced | 2020, December 18 | January 2021 | 2021, March 05 |
| Status | Available. Released 2020, December 18 | Coming Soon - January 2021 | Available. Released 2021, March 05 |
| Price | - | - | Rs. 8,999 ($0.00) [Similarly Priced] |
| Colors | Rainbow Silver, Dynamic Black, White | Carbon Gray, Twilight Blue, Sunrise Orange, Ocean Green | Cross Black, Cross Blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
164 x 75.4 x 7.9 mm (6.46 x 2.97 x 0.31 in) |
162.3 x 77.3 x 9.6 mm (6.39 x 3.04 x 0.38 in) |
165.2 x 76.4 x 8.9 mm (6.5 x 3.01 x 0.35 in) |
| Weight | 177 g (6.24 oz) | 198 g (6.98 oz) | 190 g (6.7 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 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 3, 5, 8, 38, 40, 41 | 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 |
| Messaging | |||
| Build Features | - Fingerprint Sensor (rear-mounted) |
- Fingerprint Sensor Water-repellent coating |
- Fingerprint Sensor (rear-mounted) |
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| OS | Android 10 | Android 10 | Android 10 |
| User Interface | ColorOS 7.2 | MIUI 12 | Realme UI 1.0 |
| Processor | Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm) | Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver), Qualcomm SM6115 Snapdragon 662 (11 nm) | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), MediaTek Helio G35 (12 nm) |
| GPU | PowerVR GE8320 | Adreno 610 | PowerVR GE8320 |
| RAM | 4 GB | 6 GB | 4 GB |
| Internal Memory | 64 GB | 128 GB | 64 GB |
| External Memory | microSDXC | microSDXC (dedicated slot) | microSDXC (dedicated slot) |
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| Type | IPS LCD Screen, 480 nits (typ) | IPS LCD Screen 400 nits (typ) Corning Gorilla Glass 3 |
HD+ IPS LCD Screen |
| Colors | 16M Colour | 16M Colour | 16M Colour |
| Size | 6.52 inches | 6.53 inches | 6.5 inches |
| Resolution | 720 x 1600 pixels (269 ppi) | 1080 x 2340 pixels (395 ppi) | 720 x 1600 pixels (270 ppi) |
| Screen-to-Body Ratio | 83.06% | 83.29% | 80.78% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP + 2 MP + 2 MP | 48 MP + 8 MP + 2 MP + 2 MP | 13 MP + 2 MP + 2 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | 13 MP, f/2.2, (wide), 1/3.1", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) HDR, Panorama |
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 120˚ (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (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 |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera |
5 MP, f/2.4, (wide) HDR, [Similar] |
8 MP, f/2.0, 27mm (wide), 1/4.0", 1.12µm 1080p@30fps [Similar] |
5 MP, f/2.2, (wide), 1/5.0", 1.12µm 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 | HSPA 42.2/5.76 Mbps, LTE |
| Bluetooth | 5.0, A2DP, LE, aptX | 5.0, A2DP, LE | 5.1, 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 | microUSB 2.0, USB On-The-Go | USB Type-C 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, GALILEO, BDS | Yes, with A-GPS, GLONASS, BDS |
| Browser | Yes | Yes | Yes |
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| Internal | 64 GB, 4 GB RAM eMMC 5.1 | 128 GB, 6 GB RAM or 128 GB (UFS 2.2), 4 GB RAM or 64 GB (UFS 2.1), 4 GB RAM | 64 GB, 4 GB RAM or 32 GB, 3 GB RAM eMMC 5.1 |
| Expandable Storage | microSDXC | microSDXC (dedicated slot) | microSDXC (dedicated 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 Reverse charging 2.5W |
Non-removable Li-Po Battery Battery Charging 10W |
| Capacity | 4230 mAh | 6000 mAh | 5000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 11,470 
Rs. 9,990 
