| Hardware and OS | Oppo A9s | |
| Operating System | Android v9.0 (Pie) | |
| Processor | 1.8 GHz, Octa Core Processor | |
| Chipset | Qualcomm Snapdragon 665 | |
| RAM | 4 GB | |
| Internal Memory | 128 GB | |
| Memory Card Slot | No | |
| Graphics | Adreno 610 | |
| Dual Sim | Yes | |
| Sim Size | Nano Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | Oppo A9s | other phones |
| Screen Size | 6.5 inches, 720 x 1600 pixels | |
| Display Type | Color LTPS IPS LCD (16M) | |
| Pixel Density | ~396 PPI | |
| Screen-to-Body Ratio | ~ 85.3% | |
| Touch Screen | Yes, with Multitouch | |
| Display aspect ratio | 19.5:9 | |
| Connectivity | Oppo A9s | other phones |
| 3G Network | Yes | |
| 4G Network | Yes | |
| Bluetooth | Yes, v5.0 | |
| EDGE | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, BDS | |
| USB | Yes, microUSB v2.0 | |
| USB Features | USB on-the-go | |
| VoLTE | Yes | |
| Wifi | Yes, with wifi-hotspot | |
| Camera | Oppo A9s | other phones |
| Main camera | 16 MP (Main)
2 MP f/2.4 (Depth Sensor) with autofocus | |
| Video Recording | 1080p @ 30fps FHD | |
| Flash | Yes, LED | |
| Selfie camera | 16 MP | |
| Features | HDR, Panorama | |
| Multimedia | Oppo A9s | other phones |
| Headphone jack | Yes | |
| Email | Yes | |
| FM Radio | No | |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes, supports HTML5 | |
| Java | No | |
| Design | Oppo A9s | other phones |
| Dimensions | 162 x 76.1 x 8.3 mm | |
| Weight | 190 g | |
| Battery | Oppo A9s | other phones |
| Battery capacity | 5000 mAh, Li-Po Battery | |
| Type | Non-Removable Battery | |
