| Hardware and OS | vivo Y31 | |
| Operating system | Android 5.1 (Lollipop); Funtouch 2.1 | |
| Processor | Quad-core 1.3 GHz Cortex-A7 | |
| Chipset | Mediatek MT6580 (28 nm) | |
| GPU | Mali-400MP2 | |
| Internal memory | 8 GB, 1 GB RAM | |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Display | vivo Y31 | other phones |
| Type | IPS LCD | |
| Size | 4.7" inc | |
| Resolution | 720 x 1280 px | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 64.5% | |
| Display area | 60.9 cm2 | |
| Display aspect ratio | 16:9 (height:width) | |
| Pixel Density | 312 PPI | |
| Colors | 16M | |
| Connectivity | vivo Y31 | other phones |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| Wi-Fi | Wi-Fi 802.11 b/g/n, hotspot | |
| Network | GSM / HSPA | |
| SIM card | Dual SIM | |
| Bluetooth | 4.0, A2DP | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | |
| Speed | HSPA | |
| USB | microUSB 2.0 | |
| Camera | vivo Y31 | other phones |
| Main camera | 8 MP, Single | |
| Specs | 8 MP | |
| Features | LED flash, HDR | |
| Video | 720p@30fps | |
| Selfie camera | 2 MP, Single | |
| Multimedia | vivo Y31 | other phones |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | vivo Y31 | other phones |
| Colors | White, Black | |
| Dimensions | 137.2 x 68.8 x 8.4 mm | |
| Weight | 137 g | |
| Battery | vivo Y31 | other phones |
| Battery capacity | 2100 mAh, Removable Li-Po | |
| Other | vivo Y31 | other phones |
| Release date | 2015, September | |
| Sensors | Accelerometer, proximity, compass | |
