| Hardware and OS | Vivo Y21 2021 | |
| Operating system | Android v11 | |
| Processor | MediaTek Helio P35 | |
| RAM | 4 GB | |
| Internal Storage | 64 GB | |
| Expandable memory | Yes, Upto 1 TB | |
| Custom UI | Funtouch OS | |
| Display | Vivo Y21 2021 | other phones |
| Type | HD LCD Halo Full View | |
| Size | 6.51 inches | |
| Resolution | 1600 x 720 Pixels | |
| Pixel Density | 270 ppi | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | |
| Aspect ratio | 20:9 | |
| Screen to body ratio calculated | 82.09 % | |
| Connectivity | Vivo Y21 2021 | other phones |
| Network support | 4G , 3G, 2G | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n/n 5GHz | |
| Gps | Yes with A-GPS, Glonass | |
| Bluetooth | Yes, v5.0 | |
| Dual SIM | Dual SIM, GSM GSM | |
| USB TYPE-C | Yes | |
| USB connectivity | Mass storage device, USB charging | |
| Camera | Vivo Y21 2021 | other phones |
| Main camera | 13 MP 2 MP | |
| Image | 4128 x 3096 Pixels | |
| Front camera | 8 MP | |
| Front camera resolution | 8 MP f/2.0 Primary Camera | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Autofocus | Yes | |
| Video recording | 1920x1080 @ 30 fps | |
| Multimedia | Vivo Y21 2021 | other phones |
| Audio jack | 3.5 MM | |
| FM radio | Yes | |
| Loudspeaker | Yes | |
| Design | Vivo Y21 2021 | other phones |
| Height | 164.26 mm | |
| Width | 76.08 mm | |
| Thickness | 8.00 mm | |
| Weight | 182 grams | |
| Colours | Midnight Blue, Diamond Glow | |
| Battery | Vivo Y21 2021 | other phones |
| Capacity | 5000 mAh | |
| Type | Lithium | |
| Quick charging | Yes, Fast, 18W | |
| Other | Vivo Y21 2021 | other phones |
| Fingerprint sensor | Yes | |
| Fingerprint sensor position | Side | |
| Other sensors | Accelerometer, Ambient Light Sensor, Proximity Sensor, E-compass, Gyroscope Sensor | |
