| Brand: | Vivo |
| Model: | Y31 (2015) |
| Release Date: | 2015, September. Released 2015, October |
| Size: | 4.7 inches, 60.9 cm2 (~64.5% screen-to-body ratio) |
| Resolution: | 720 x 1280 pixels, 16:9 ratio (~312 ppi density) |
| Technology: | IPS LCD |
| Main Specs: | 8 MP |
| Main Features: | LED flash, HDR |
| Main Video: | 720p@30fps |
| Selfie Specs: | 2 MP |
| Capacity: | Li-Po 2100 mAh, removable |
| Type: | Li-Po |
| Chipset: | Mediatek MT6580 (28 nm) |
| Ram: | 1GB |
| Storage: | 8GB |
| Expandable: | microSDXC (dedicated slot) |
| Os Version: | 5.1 |
| Dimensions: | 137.2 x 68.8 x 8.4 mm (5.40 x 2.71 x 0.33 in) |
| Weight: | 137 g (4.83 oz) |
| Wifi: | Wi-Fi 802.11 b/g/n, hotspot |
| Bluetooth: | 4.0, A2DP |
| Nfc: | No |
| Usb: | microUSB 2.0 |
| Headphone Jack: | Yes |
| Network: | GSM / HSPA |
| Sensors: | Accelerometer, proximity, compass |
| Colors: | White, Black |