| Brand: | Vivo |
| Model: | Y31 |
| Type: | Smartphone |
| Release Date: | 2025 |
| Size: | 6.68 inches |
| Protection: | Guardian Glass (ion-strengthened) |
| Main Specs: | 50 MP, f/1.8, (wide), PDAF -Auxiliary lens |
| Main Video: | 1080p@30fps |
| Selfie Specs: | 8 MP, f/2.0, (wide) |
| Capacity: | 6500 mAh |
| Type: | Li-Ion |
| Chipset: | Qualcomm SM4450 Snapdragon 4 Gen 2 (4 nm) |
| Cpu: | Octa-core (2x2.2 GHz Cortex-A78 & 6x1.95 GHz Cortex-A55) |
| Gpu: | Adreno 613 |
| Ram: | 4 GB |
| Storage: | 128 GB |
| Expandable: | microSDXC (uses shared SIM slot) |
| Os: | Android 15, Funtouch 15 |
| Os Version: | 15 |
| Dimensions: | 166.1 x 77 x 8.4 mm |
| Weight: | 209 g |
| Sim: | Nano-SIM + Nano-SIM |
| Wifi: | Wi-Fi 802.11 a/b/g/n/ac, dual-band |
| Bluetooth: | 4.2, A2DP, LE |
| Nfc: | No |
| Usb: | USB Type-C 2.0, OTG |
| Headphone Jack: | No |
| Network: | GSM / HSPA / LTE / 5G |
| Colors: | Rose Red, Diamond Green |
| Usd: | ~162 USD |
| Os Family: | Android |
| Os Launch Version: | 15 |
| Os Skin: | Funtouch 15 |
