| Hardware and OS | Vivo Y21G | |
| Operating system | Android v11 | |
| Processor | Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | |
| Chipset | Mediatek MT6765 Helio P35 (12nm) | |
| Internal Storage | 64 GB | |
| GPU | PowerVR GE8320 | |
| RAM | 4 GB | |
| Camera | Vivo Y21G | other phones |
| Main camera | 13 MP 2 MP 2 MP | |
| Autofocus | Yes | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Front camera | 8 MP | |
| Front camera resolution | 8 MP Primary Camera | |
| Video recording | Yes | |
| Connectivity | Vivo Y21G | other phones |
| Bluetooth | Yes, v5.0 | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| Dual SIM | Dual SIM, GSM GSM | |
| GPS | Yes, with A-GPS | |
| Network support | 5G , 4G , 3G, 2G | |
| USB connectivity | Mass storage device, USB charging | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n | |
| Multimedia | Vivo Y21G | other phones |
| Loudspeaker | Yes | |
| Battery | Vivo Y21G | other phones |
| Capacity | 5000 mAh | |
| Type | Li-Polymer | |
| User replaceable | No | |
| Quick charging | Yes, Fast, 10W | |
| Design | Vivo Y21G | other phones |
| Colors | Dawn White, Nebula Blue | |
| Height | 164.4 mm | |
| Width | 76.3 mm | |
| Thickness | 8.4 mm | |
| Weight | 192 grams | |
| Features | Vivo Y21G | other phones |
| Fingerprint sensor position | Side | |
| Fingerprint sensor | Yes | |
| Other sensors | Accelerometer, Gyro, Proximity, Compass | |
