| Hardware and OS | OPPO K9x 5G | |
| Operating System | Android v11 | |
| Processor | 2.4 GHz, Octa Core Processor | |
| Chipset | MediaTek Dimensity 810 5G | |
| Cores | 2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55 | |
| RAM | 6 GB | |
| Internal Memory | 128 GB | |
| Memory Card Slot | No | |
| Graphics | Mali-G57 MC2 | |
| Dual Sim | Yes | |
| Sim Size | Nano SIM | |
| Sim Type | Dual Sim, GSM GSM | |
| Display | OPPO K9x 5G | other phones |
| Screen Size | 6.5 inches, 1080 x 2400 pixels, 90 Hz | |
| Display Type | Color IPS LCD screen (16M) | |
| Pixel Density | ~405 PPI | |
| Screen-to-Body Ratio | ~ 87.3% | |
| Touch Screen | Yes, with Multitouch | |
| Display aspect ratio | 20:9 | |
| Connectivity | OPPO K9x 5G | other phones |
| 3G Network | Yes | |
| 4G Network | Yes | |
| 5G Network | Yes | |
| Bluetooth | Yes, v5.0, A2DP, LE | |
| EDGE | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS, QZSS | |
| USB | Yes, USB-C v2.0 | |
| USB Features | USB on-the-go, USB Charging | |
| VoLTE | Yes | |
| Wifi | Yes, with wifi-hotspot | |
| Camera | OPPO K9x 5G | other phones |
| Main camera | 64 MP f/1.8 (Wide Angle)
8 MP f/2.2 (Ultra Wide)
2 MP f/2.4 (Depth Sensor) with autofocus | |
| Video Recording | 4K @ 30fps UHD, 1080p @ 30fps FHD | |
| Flash | Yes, LED | |
| Selfie camera | Punch Hole 16 MP f/2.4 (Wide Angle) | |
| Front Video Recording | 1080p @ 30fps FHD | |
| Features | HDR, Panorama | |
| Multimedia | OPPO K9x 5G | other phones |
| Headphone jack | Yes | |
| Email | Yes | |
| FM Radio | No | |
| Music | Yes | |
| Video | Yes | |
| Browser | Yes | |
| Java | No | |
| Design | OPPO K9x 5G | other phones |
| Dimensions | 159.1 x 73.4 x 7.9 mm | |
| Weight | 172 g | |
| Battery | OPPO K9x 5G | other phones |
| Battery capacity | 5000 mAh, Li-Po Battery | |
| Type | Non-Removable Battery | |
| Fast Charging | 30W Fast charging | |
