| OPPO A21 2020 |
Xiaomi Redmi Note 8 |
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| Hardware and OS | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Operating system | Android v11 | Android 9.0 (Pie); MIUI 10 |
| Processor | Octa core (2.3 GHz, Quad core, Cortex A53 1.65 GHz, Quad core, Cortex A53) | Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| Chipset | MediaTek Helio P30 MT6758 | Qualcomm SDM665 Snapdragon 665 (11 nm) |
| GPU | Mali-G71 MP2 | Adreno 610 |
| Architecture | 64 bit | |
| Internal memory | 128 GB | 32GB 3GB RAM, 64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM |
| External memory | Yes, Up to 256 GB | microSD, up to 256 GB (dedicated slot) |
| RAM | 6 GB | |
| Display | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Type | IPS LCD | IPS LCD |
| Size | 5.7 inches (14.48 cm) | 6.3" inc |
| Resolution | 1080 x 2340 px | |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | capacitive touchscreen |
| Screen format | 18:9 | |
| Screen-to-Body Ratio | 81.7% | |
| PPI /points per inch/ | 282 ppi | |
| Display area | 97.4 cm2 | |
| Display aspect ratio | 19.5:9 (height:width) | |
| Screen Protection | Corning Gorilla Glass v3, | |
| Pixel Density | 409 PPI | |
| Colors | 16M | |
| Connectivity | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| 4G Bands | TD-LTE 2300(band 40), FD-LTE 1800(band 3) | |
| Network Support | 4G, 3G, 2G | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| 4G Network | LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 40(2300), 41(2500) | |
| Wi-Fi | Yes, Wi-Fi 802.11, b/g/n | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | GSM / HSPA / LTE | |
| USB Connectivity | Mass storage device, USB charging, microUSB 2.0 | |
| VoLTE | Yes | |
| SIM card | SIM1: Nano, SIM2: Nano | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | Yes, v5.1 | 4.2, A2DP, LE |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes with A-GPS, Glonass | Yes, with A-GPS, GLONASS, BDS |
| Speed | HSPA 42.2/11.5 Mbps, LTE-A | |
| USB | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | |
| Camera | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Camera Setup | Dual | |
| Autofocus | Yes | |
| Camera Features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Main camera | 13 MP, Primary Camera, 2 MP, | 48 MP, Quad |
| Image Resolution | 4128 x 3096 Pixels | |
| Specs | 48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4", 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 | |
| Video Recording | 1920x1080 @ 30 fps | |
| Features | LED flash, HDR, panorama | |
| Video | 2160p@30fps, 1080p@30/60/120fps, gyro-EIS | |
| Selfie camera | 8 MP, Primary Camera, | 13 MP, Single |
| Multimedia | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Headphone jack | 3.5 mm | |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Colors | Neptune Blue, Moonlight White, Space Black | |
| Body build | Front/back glass (Gorilla Glass 5) | |
| Dimensions | 158.3 x 75.3 x 8.4 mm | |
| Weight | 190 g | |
| Other features | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Fingerprint Sensor | Yes | |
| Fingerprint Sensor Position | Side | |
| Other Sensors | Light sensor, Proximity sensor, Accelerometer, Compass | |
| Battery | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| Capacity | 4000 mAh | |
| Type | Li-Polymer | |
| Removable | No | |
| USB Type-C | No | |
| Battery capacity | 4000 mAh, Non-removable Li-Po | |
| Other | OPPO A21 2020 | Xiaomi Redmi Note 8 |
| SAR | SAR - 0.26 W/kg (head) 1.00 W/kg (body) SAR EU - 0.26 W/kg (head) 1.00 W/kg (body) | |
| Release date | 2019, August | |
| Sensors | Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass , Infrared port |
