OnePlus 9 sports a 6.55-inches bezel-less Fluid AMOLED display that offers a screen resolution of 1080 x 2400 pixels and 402 ppi pixel density. The display has a Corning Gorilla Glass protection. The smartphone is powered by a Qualcomm Snapdragon 888 octa-core processor. As for the storage, the handset packs 128GB internal memory (with no support for expandable memory). The phone boasts a triple rear camera setup (48MP+50MP+2MP) and a single 16MP front-facing camera. The device packs 8GB RAM for multitasking and Adreno 660 GPU for graphical performance. For power backup, the phone has a 4500mAh Li-ion battery with fast charging support. The device runs Oxygen OS-based on Android v11 operating system. The other variants of this mobile are the OnePlus 9 Pro, OnePlus 9 Lite and the OnePlus 9E.
| Processor | Qualcomm Snapdragon 888 |
| Display | 6.55 inches (16.64 cms) |
| Storage | 128 GB |
| Front Camera | Single (16 MP, f/2.4, Wide Angle Camera(3" sensor size, 1 m pixel size)) |
| Rear Camera | Triple (48 MP, f/1.8, Wide Angle Camera + 50 MP, f/2.2, Wide Angle, Ultra-Wide Angle Camera(14 mm focal length, 1.56" sensor size, 1µm pixel size) + 2 MP, f/2.4 Camera) |
| Battery | 4500 mAh |
| RAM | 8 GB |
| Launch Date | April 15, 2021 |
| Dimensions | 6.3 x 2.91 x 0.32 inch (160 x 73.9 x 8.1 mm) |
| Weight | 183 grams |
| Build | Back: Gorilla Glass |
| Face unlock | Yes |
| Colors | Astral Black, Arctic Sky, Winter Mist |
| Chipset | Qualcomm Snapdragon 888 |
| No of Cores | 8 (Octa Core) |
| CPU | 2.84GHz, Single core, Kryo 680 + 2.42GHz, Tri core, Kryo 680 + 1.8GHz, Quad core, Kryo 680 |
| Architecture | 64-bit |
| Graphics | Adreno 660 |
| Operating System | Android v11 |
| Custom UI | Oxygen OS |
| Internal Memory | 128 GB |
| RAM | 8 GB |
| Expandable Memory | No |
| Display Type | Fluid AMOLED, HDR 10+ |
| Resolution | 1080 x 2400 pixels |
| Size | 6.55 inches (16.64 cms) |
| Aspect ratio | 20:9 |
| Bezel-less display | Yes, with Punch-hole |
| Brightness | 1100 nits |
| Protection | Corning Gorilla Glass |
| TouchScreen | Yes, Capacitive, Multi-touch |
| Color Reproduction | 16M Colors |
| Screen to body percentage | 87.6 % |
| Pixel Density | 402 pixels per inch (ppi) |
| Flash | Rear (Dual LED Flash), Front (Screen flash) |
| Rear | Triple (48 MP, f/1.8, Wide Angle Camera + 50 MP, f/2.2, Wide Angle, Ultra-Wide Angle Camera(14 mm focal length, 1.56" sensor size, 1µm pixel size) + 2 MP, f/2.4 Camera) |
| Sensor | Exmor-RS CMOS Sensor, UltraPixel BSI image sensor |
| Front | Single (16 MP, f/2.4, Wide Angle Camera(3" sensor size, 1µm pixel size)) |
| Camera Features | Auto Flash, Auto Focus, Face detection, Touch to focus |
| Shooting Modes | Continuos Shooting, High Dynamic Range mode (HDR) |
| Image Stabilization | Yes, Electric Image Stabilization (EIS) |
| Video | Rear: 7680x4320 @ 30 fps, 3840x2160 @ 60 fps, 1920x1080 @ 240 fps, 1280x720 @ 480 fps, Front: 1920x1080 @ 30 fps |
| Charging speed | 100 % in 29 minutes (claimed by Brand) |
| Type | Li-ion |
| Capacity | 4500 mAh |
| Removable | No |
| Fast Charging | Yes, Warp, 65W |
| SIM Configuration | Dual SIM (SIM1: Nano) (SIM2: Nano) |
| Bluetooth | Bluetooth v5.2 |
| Wi-Fi | Yes with a/ac/ax/b/g/n, MIMO |
| Network | 5G: Supported by device (network not rolled-out in India), 4G: Available (supports Indian bands), 3G: Available, 2G: Available |
| Voice over LTE(VoLTE) | Yes |
| Wi-fi features | Mobile Hotspot |
| GPS | Yes with A-GPS, Glonass |
| Infrared | Yes |
| USB | USB Type-C, Mass storage device, USB charging |
| NFC Chipset | Yes |
| Fingerprint sensor | Yes, On-screen |
| Other Sensor | Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope |
| Speaker Features | Dolby Atmos |
| Speaker | Yes |
| Audio Jack | Yes, USB Type-C |