The Oppo K12 Plus mobile phone was launched on October 12, 2024. The phone features a 6.70-inch touchscreen display with a refresh rate of 120Hz and a resolution of 1080×2412 pixels (FHD+) with a pixel density of 394 pixels per inch (ppi). The Oppo K12 Plus is powered by an octa-core Qualcomm Snapdragon 7 Gen 3 processor. It comes with 8GB of RAM. The Oppo K12 Plus runs Android 14 and is powered by a 6400mAh non-removable battery. Oppo K12 Plus supports 80 W Fast Charging.

In terms of cameras, the Oppo K12 Plus sports a dual camera setup at the back that includes a 50-megapixel (f/1.8) primary camera and an 8-megapixel (f/2.2, ultra-wide) camera. It has a single front-facing selfie camera with a 16-megapixel sensor with f/2.4 aperture.

The Oppo K12 Plus runs ColorOS 14 based on Android 14 and has 256GB of built-in storage that can be expanded using a microSD card (up to 1024GB). The Oppo K12 Plus is a dual-SIM (GSM and GSM) mobile phone that supports Nano-SIM and Nano-SIM cards. The Oppo K12 Plus measures 162.50 x 75.30 x 8.37 mm (H x W x D) and weighs 192.00 grams. It was presented in Basalt Black and Snow Peaks White colors. It has an IP54 dust and water protection class.

Connectivity options on the Oppo K12 Plus include Wi-Fi 802.11 a/b/g/n/ac/ax, GPS, Bluetooth v5.40, NFC, infrared port, USB Type-C, 3G, 4G (with Band 40 support, which used by some LTE networks in India) and 5G with active 4G on both SIM cards. Sensors on the phone include an accelerometer, ambient light sensor, compass/magnetometer, gyroscope, proximity sensor and an in-display fingerprint sensor.