The OPPO F9 runs Android 8.1 Oreo-based ColorOS 5.2 and features a 6.3-inch LTPS IPS LCD screen with Full HD+ resolution, a waterdrop notch and Gorilla Glass 6 protection. The phone has a 16MP+2MP dual-camera at the rear with Full HD video recording. At the front, there’s a 16MP selfie camera. The OPPO F9 uses the MediaTek Helio P60 processor, 4GB RAM, 64GB storage and has a microSD card slot as well (uses SIM 2 slot). It has a fingerprint reader, dual-SIM card slot, microUSB port, 3.5mm headphone jack and a 3500mAh battery The other variant of this smartphone is the Oppo F9 Pro, which has 6GB RAM, 25MP AI selfie camera, and 20W VOOC Flash Charge The other Oppo mobile phones you may be interested in are the Oppo F11 and the Oppo F11 Pro