| Hardware and OS Cat S31 |
| Operating system: | Android 7.0 (Nougat) |
| Processor: | Quad-core 1.3 GHz Cortex-A7 |
| Chipset: | Qualcomm MSM8909 Snapdragon 210 (28 nm) |
| GPU: | Adreno 304 |
| Internal memory: | 16 GB, 2 GB RAM |
| External memory: | microSD, up to 64 GB (dedicated slot) |
| Display Cat S31 |
| Type: | TFT |
| Size: | 4.7" inc |
| Resolution: | 720 x 1280 px |
| Protection: | Corning Gorilla Glass 3 |
| Touchscreen: | capacitive touchscreen |
| Screen-to-Body Ratio: | 56.1% |
| Display area: | 60.9 cm2 |
| Display aspect ratio: | 16:9 (height:width) |
| Pixel Density: | 312 PPI |
| Connectivity Cat S31 |
| 2G Network: | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) |
| 3G Network: | HSDPA 850 / 900 / 1900 / 2100 - EU |
| 4G Network: | LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800) - EU |
| Wi-Fi: | Wi-Fi 802.11 b/g/n, hotspot |
| Network: | GSM / HSPA / LTE |
| SIM card: | Single SIM (Nano-SIM)Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth: | 4.1, A2DP, LE |
| Edge: | Yes |
| GPRS: | Yes |
| GPS: | Yes, with A-GPS, GLONASS, BDS |
| Speed: | HSPA, LTE Cat4 150/50 Mbps |
| USB: | microUSB 2.0, USB On-The-Go |
| Camera Cat S31 |
| Main camera: | 8 MP,
Single |
| Specs: | 8 MP, AF |
| Features: | LED flash |
| Video: | 720p@30fps |
| Selfie camera: | 2 MP,
Single |
| Specs: | 2 MP |
| Multimedia Cat S31 |
| 3.5 mm Jack: | Yes |
| Radio: | FM radio |
| Design Cat S31 |
| Colors: | Black |
| Dimensions: | 146 x 74.4 x 12.6 mm |
| Weight: | 200 g |
| Battery Cat S31 |
| Battery capacity: | 4000 mAh, Non-removable Li-Ion |
| Other Cat S31 |
| Release date: | 2017, September |
| Sensors: | Accelerometer, proximity, compass |
