| Vivo Y21s | Xiaomi Poco F4 5G | |
| Specifications | ||
| Brand | Vivo | Xiaomi |
| Model | - | - |
| Release Date | September 2021 | June 2022 |
| Operating System | Android 11 | MIUI (Android 12) |
| Dimensions | ||
| Size | 164.3 x 76.1 x 8.0 mm 6.47 x 3.00 x 0.31 in |
163.2 x 76.0 x 7.7 mm 6.43 x 2.99 x 0.30 in |
| Weight | 182 g 6.42 oz |
195 g 6.88 oz |
| Screen | ||
| Size | 6.51 inches | 6.67 inches |
| Resolution | 720 x 1,600 pixels | 1,080 x 2,400 pixels |
| PPI | 270 | 395 |
| Features | - | OLED, 120Hz |
| Cameras | ||
| Rear | Triple camera 50 MP f/1.8 Wide 2 MP f/2.4 Macro 2 MP f/2.4 Depth |
Triple camera 64 MP f/1.8 Wide 8 MP f/2.2 Ultra Wide 2 MP f/2.4 Macro |
| Front | 8 MP f/2.0 Wide | 20 MP f/2.5 Wide |
| Storage | ||
| Memory | 4 GB 6 GB |
6 GB 8 GB 12 GB |
| Fixed | 128 GB | 128 GB 256 GB |
| Removable | microSDXC | - |
| Processor | ||
| Chip | MediaTek Helio G80 Octa-core processor 12 nm |
Qualcomm Snapdragon 870 5G SM8250-AC Octa-core processor 7 nm |
| CPU | 2x 2.00 GHz Cortex-A75 6x 1.80 GHz Cortex-A55 |
1x 3.20 GHz Kryo 585 Prime 3x 2.42 GHz Kryo 585 Gold 4x 1.80 GHz Kryo 585 Silver |
| GPU | Mali-G52 MC2 | Adreno 650 |
| Battery | ||
| Capacity | 5,000 mAh | 4,500 mAh |
| Features | Fast charging 18W | Fast charging 67W |
| Removable | ||
| Connectivity | ||
| 5G | ||
| NFC | ||
| 3.5 mm Audio Jack | ||
| Micro USB | ||
| USB Type-C | ||
| Lightning | ||