| Hardware and OS | Oppo Realme C31 | |
| Operating system | Android 11, Realme UI 2.0 | |
| Processor | Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55) | |
| Chipset | Unisoc Tiger T612 (12 nm) | |
| Internal memory | 32GB 3GB RAM, 64GB 4GB RAM | |
| External memory | microSDXC (dedicated slot) | |
| GPU | Mali-G57 | |
| Display | Oppo Realme C31 | other phones |
| Type | IPS LCD | |
| Size | 6.5" inc | |
| Resolution | 720 x 1600 px | |
| Display colors | 16M | |
| Screen area | 102.0 cm2 | |
| Screen format | 20:9 (height:width) | |
| Screen to body ratio | 81.4% | |
| PPI /points per inch/ | 270 PPI | |
| Screen protection | Panda Glass | |
| Touchscreen | capacitive touchscreen | |
| Connectivity | Oppo Realme C31 | other phones |
| Network | GSM / HSPA / LTE | |
| NFC | No | |
| Edge | Yes | |
| Bluetooth | 5.0, A2DP, LE | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | |
| USB | microUSB 2.0 | |
| Camera | Oppo Realme C31 | other phones |
| Rear camera, main | 13 MP, Triple | |
| Camera specs | 13 MP, f/2.2, 25mm (wide), 1/3.06", 1.12µm, AF
-2 MP, f/2.4, (macro)
-0.3 MP, f/2.8, (depth) | |
| Functions | LED flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Front camera, selfie | 5 MP, Single | |
| Specifications | 5 MP, f/2.2, 27mm (wide), 1/5.0", 1.12µm | |
| Multimedia | Oppo Realme C31 | other phones |
| Headphone jack | Yes | |
| Radio | No | |
| Design | Oppo Realme C31 | other phones |
| Dimensions (HxWxD) | 164.7 x 76.1 x 8.4 mm | 6.48 x 3 x 0.33 in | |
| Weight | 197 g | 6.95 oz | |
| Colors | Light Silver, Dark Green | |
| Body build | Glass front, plastic frame, plastic back | |
| Battery | Oppo Realme C31 | other phones |
| Battery | 5000 mAh, Li-Po, non-removable | |
| Other features | Oppo Realme C31 | other phones |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity | |
