| Hardware and OS | Oppo Realme V21 | |
| Operating system | Android 12, Realme UI 3.0 | |
| Processor | Octa-core 2.2 GHz | |
| Internal memory | 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM | |
| External memory | microSDXC | |
| Display | Oppo Realme V21 | other phones |
| Type | TFT | |
| Size | 6.56" inc | |
| Resolution | 720 x 1612 px | |
| Display colors | 16M | |
| Screen area | 103.4 cm2 | |
| Screen format | 20:9 (height:width) | |
| Screen to body ratio | % | |
| PPI /points per inch/ | 269 PPI | |
| Touchscreen | capacitive touchscreen | |
| Connectivity | Oppo Realme V21 | other phones |
| Network | GSM / CDMA / HSPA / LTE | |
| NFC | No | |
| Edge | Yes | |
| Bluetooth | 5.0, A2DP, LE, aptX HD | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| USB | USB Type-C 2.0, USB On-The-Go | |
| Camera | Oppo Realme V21 | other phones |
| Rear camera, main | 13 MP, Dual | |
| Camera specs | 13 MP, f/2.2, 26mm (wide), 1/3.06'', 1.12µm, PDAF
-2 MP, f/2.4, (depth) | |
| Functions | LED flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Front camera, selfie | 8 MP, Single | |
| Specifications | 8 MP, f/2.0, (wide) | |
| Multimedia | Oppo Realme V21 | other phones |
| Headphone jack | Yes | |
| Radio | No | |
| Design | Oppo Realme V21 | other phones |
| Dimensions (HxWxD) | xx mm | 0 x 0 x 0 in | |
| Weight | 0 g | 0 oz | |
| Colors | Black, Blue | |
| Battery | Oppo Realme V21 | other phones |
| Battery | 5000 mAh, Li-Po, non-removable | |
| Other features | Oppo Realme V21 | other phones |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity, compass | |
