| Brand: | Vivo |
| Model: | Y21 |
| Type: | Smartphone |
| Release Date: | 2021, August 20 |
| Size: | 6.51 inches, 102.3 cm2 (~81.8% screen-to-body ratio) |
| Resolution: | 720 x 1600 pixels, 20:9 ratio (~270 ppi density) |
| Technology: | IPS LCD |
| Main Specs: | 13 MP, f/2.2, (wide), PDAF, 2 MP, f/2.4, (macro) |
| Main Features: | LED flash |
| Main Video: | 1080p@30fps |
| Selfie Specs: | 8 MP, f/2.0, (wide) |
| Selfie Video: | 1080p@30fps |
| Capacity: | Li-Po 5000 mAh, non-removable |
| Type: | Li-Po |
| Chipset: | Mediatek MT6765 Helio P35 (12nm) |
| Ram: | 4GB |
| Storage: | 64GB |
| Expandable: | microSDXC (dedicated slot) |
| Os Version: | 11.1 |
| Dimensions: | 164.3 x 76.1 x 8 mm (6.47 x 3.00 x 0.31 in) |
| Weight: | 182 g (6.42 oz) |
| Wifi: | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Bluetooth: | 5.0, A2DP, LE |
| Nfc: | No |
| Usb: | USB Type-C 2.0, USB On-The-Go |
| Headphone Jack: | Yes |
| Network: | GSM / HSPA / LTE |
| Sensors: | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass |
| Colors: | Diamond Glow, Midnight Blue |