As far as the cameras are concerned, the OnePlus 9RT on the rear packs a triple camera setup featuring a 50-megapixel primary camera with an f/1.8 aperture; a 16-megapixel camera with an f/2.2 aperture, and a 2-megapixel camera. The rear camera setup has autofocus. It has a single front camera setup for selfies, featuring a 16-megapixel sensor with an f/2.4 aperture.

The OnePlus 9RT runs ColorOS is based on Android 11 and packs 128GB of inbuilt storage. The OnePlus 9RT is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. The OnePlus 9RT measures 162.20 x 74.60 x 8.29mm (height x width x thickness) and weighs 198.50 grams. It was launched in Black, Blue, and Silver colours.

Connectivity options on the OnePlus 9RT include Wi-Fi 802.11 a/b/g/n/ac/Yes, GPS, Bluetooth v5.20, NFC, USB Type-C, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, gyroscope, proximity sensor, and in-display fingerprint sensor.