| Hardware and OS Realme V21 5G |
| Operating system: | Android v11 |
| Processor: | MediaTek Dimensity 800U 5G |
| RAM: | 4 GB |
| Internal Storage: | 64 GB |
| Display Realme V21 5G |
| Type: | AMOLED |
| Size: | 6.52 inches |
| Resolution: | 720 x 1600 Pixels |
| Pixel Density: | 411 ppi |
| Touchscreen: | Yes, Capacitive Touchscreen, Multi-touch |
| Connectivity Realme V21 5G |
| Network support: | 5G , 4G , 3G, 2G |
| WI-FI: | Yes, Wi-Fi 802.11, b/g/n |
| Gps: | Yes, with A-GPS, Glonass |
| Bluetooth: | Yes, v5.0 |
| NFC: | Yes |
| Dual SIM: | Dual SIM, GSM GSM |
| SIM size: | SIM1: Nano, SIM2: Nano |
| USB connectivity: | Mass storage device, USB charging |
| Camera Realme V21 5G |
| Main camera: | 13 MP 2 MP |
| Front camera: | 8 MP |
| Front camera resolution: | 8 MP |
| Camera features: | Digital Zoom, Auto Flash, Face detection, Touch to focus |
| Flash: | Yes, LED Flash |
| Autofocus: | Yes |
| Video recording: | Yes |
| Multimedia Realme V21 5G |
| Audio jack: | 3.5 MM |
| Loudspeaker: | Yes |
| Design Realme V21 5G |
| Height: | 160.9 mm |
| Width: | 74.4 mm |
| Thickness: | 8.1 mm |
| Weight: | 176 grams |
| Colours: | Blue, Orange, Red, Yellow-Pink |
| Battery Realme V21 5G |
| Capacity: | 5000 mAh |
| Type: | Li-Polymer |
| Other Realme V21 5G |
| Fingerprint sensor: | Yes |
| Fingerprint sensor position: | Side |
| Other sensors: | Accelerometer, Gyro, Proximity, Compass |
