| Oppo A57 4G |
Xiaomi Redmi Note 9 Pro |
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| Hardware and OS | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Operating system | Android 12, ColorOS 12.1 | Android 10.0; MIUI 11 |
| Processor | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver) |
| Chipset | MediaTek MT6765G Helio G35 (12 nm) | Qualcomm SM7125 Snapdragon 720G (8 nm) |
| GPU | PowerVR GE8320 | Adreno 618 |
| Internal memory | 64GB 3GB RAM | 64GB 4GB RAM, 128GB 6GB RAM |
| External memory | microSDXC | microSDXC (dedicated slot) |
| Display | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Type | IPS LCD | IPS LCD |
| Size | 6.56" inc | 6.67" inc |
| Resolution | 720 x 1612 px | 1080 x 2400 px |
| Protection | Corning Gorilla Glass 5 | |
| Display colors | 16M | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen |
| Screen area | 103.4 cm2 | |
| Screen-to-Body Ratio | 84.5% | |
| Screen format | 20:9 (height:width) | |
| Display area | 107.4 cm2 | |
| Screen to body ratio | 84.2% | |
| Display aspect ratio | 20:9 (height:width) | |
| PPI /points per inch/ | 269 PPI | |
| Pixel Density | 395 PPI | |
| Colors | 16M | |
| Other | 450 nits typ. brightness (advertised) | |
| Connectivity | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| NFC | No | |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) | |
| Wi-Fi | Yes | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | GSM / HSPA / LTE | GSM / HSPA / LTE |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | Yes | 5.0, A2DP, LE |
| Edge | Yes | Yes |
| GPRS | Yes | Yes |
| GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, NavIC |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |
| USB | USB Type-C 2.0, USB On-The-Go | 2.0, Type-C 1.0 reversible connector |
| Camera | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Rear camera, main | 13 MP, Dual | |
| Camera specs | 13 MP, f/2.2, 26mm (wide), 1/3.06'', 1.12µm, AF -2 MP, f/2.4, (depth) | |
| Functions | LED flash, HDR, panorama | |
| Main camera | 48 MP, Quad | |
| Front camera, selfie | 8 MP, Single | |
| Specs | 48 MP, f/1.8, (wide), 1/2.25", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm -5 MP, f/2.4, (macro), 1.12µm -2 MP, f/2.4, (depth) | |
| Features | LED flash, HDR, panorama | |
| Specifications | 8 MP, f/2.0, (wide) | |
| Video | 1080p@30fps | 2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS |
| Selfie camera | 16 MP, Single | |
| Multimedia | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Headphone jack | Yes | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio, recording | |
| Design | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Dimensions (HxWxD) | 163.7 x 75 x 8 mm | 6.44 x 2.95 x 0.31 in | |
| Colors | Glowing Black, Glowing Green | Aurora Blue, Glacier White, Interstellar Black |
| Body build | Glass front, plastic frame, plastic back | Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame |
| Dimensions | 165.8 x 76.7 x 8.8 mm | |
| Weight | 187 g | 6.6 oz | 209 g |
| Other features | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity Fast charging 33W, 50% in 30 min IPX4 water resistant, IP5X dust resistant | |
| Battery | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Battery | 5000 mAh, Li-Po, non-removable | |
| Battery capacity | 5020 mAh, Non-removable Li-Po | |
| Other | Oppo A57 4G | Xiaomi Redmi Note 9 Pro |
| Release date | 2020, March 12 | |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass , Infrared port |
