| Vivo X31 |
Xiaomi Redmi Note 8 |
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| Hardware and OS | Vivo X31 | Xiaomi Redmi Note 8 |
| Operating system | Android v11 | Android 9.0 (Pie); MIUI 10 |
| Processor | Exynos 990 (8 nm) | Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| Chipset | Qualcomm SDM665 Snapdragon 665 (11 nm) | |
| RAM | 8 GB | |
| GPU | Adreno 610 | |
| Internal Storage | 128 GB | |
| Internal memory | 32GB 3GB RAM, 64GB 4GB RAM, 64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM | |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Display | Vivo X31 | Xiaomi Redmi Note 8 |
| Type | Super AMOLED | IPS LCD |
| Size | 6.44 inches | 6.3" inc |
| Resolution | 1080 x 2400 Pixels | 1080 x 2340 px |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | capacitive touchscreen |
| Screen-to-Body Ratio | 81.7% | |
| Display area | 97.4 cm2 | |
| Display aspect ratio | 19.5:9 (height:width) | |
| Pixel Density | 383 ppi | 409 PPI |
| Colors | 16M | |
| Connectivity | Vivo X31 | Xiaomi Redmi Note 8 |
| Network support | 5G , 4G , 3G, 2G | |
| NFC | Yes | |
| Dual SIM | Dual SIM, GSM GSM | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| USB connectivity | Mass storage device, USB charging | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| 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, a/ac/b/g/n/n 5GHz | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Network | GSM / HSPA / LTE | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | Yes, v5.0 | 4.2, A2DP, LE |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | 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 | Vivo X31 | Xiaomi Redmi Note 8 |
| Front camera resolution | 32 MP Primary Camera | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Autofocus | Yes | |
| Video recording | Yes | |
| Main camera | 48 MP, Quad | |
| 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 | |
| Features | LED flash, HDR, panorama | |
| Video | 2160p@30fps, 1080p@30/60/120fps, gyro-EIS | |
| Selfie camera | 13 MP, Single | |
| Multimedia | Vivo X31 | Xiaomi Redmi Note 8 |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | Vivo X31 | Xiaomi Redmi Note 8 |
| Colours | Black, Peach, Light Blue | |
| 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 | |
| Battery | Vivo X31 | Xiaomi Redmi Note 8 |
| Capacity | 5000 mAh | |
| Type | Lithium Polymer | |
| User replaceable | No | |
| Battery capacity | 4000 mAh, Non-removable Li-Po | |
| Other | Vivo X31 | Xiaomi Redmi Note 8 |
| Fingerprint sensor | Yes | |
| Fingerprint sensor position | On-Screen | |
| Other sensors | Accelerometer, Gyro, Proximity, Compass | |
| 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 |
