Oppo K9 5G smartphone was launched on 6th May 2021. The phone comes with a 6.43-inch touchscreen display with a resolution of 1080x2400 pixels at a pixel density of 410 pixels per inch (ppi) and an aspect ratio of 20:9. Oppo K9 5G is powered by an octa-core Qualcomm Snapdragon 768G processor. It comes with 8GB of RAM. The Oppo K9 5G runs Android 11 and is powered by a 4300mAh battery. The Oppo K9 5G supports proprietary fast charging.

As far as the cameras are concerned, the Oppo K9 5G on the rear packs a 64-megapixel primary camera with an f/1.7 aperture; an 8-megapixel camera with an f/2.2 aperture, and a 2-megapixel camera with an f/2.4 aperture. The rear camera setup has autofocus. It sports a 32-megapixel camera on the front for selfies with an f/2.4 aperture.

The Oppo K9 5G runs ColorOS 11.1 is based on Android 11 and packs 128GB of inbuilt storage. The Oppo K9 5G is a dual-SIM smartphone that accepts Nano-SIM and Nano-SIM cards. The Oppo K9 5G measures 159.10 x 73.40 x 7.90mm (height x width x thickness) and weighs 172.00 grams. It was launched in Black and Gradient colours.

Connectivity options on the Oppo K9 5G include Wi-Fi 802.11 a/b/g/n/ac, GPS, USB Type-C, 3G, and 4G. Sensors on the phone include accelerometer, ambient light sensor, gyroscope, proximity sensor, and in-display fingerprint sensor.