Realme C25S comes with a 6.50-inch touchscreen display with a resolution of 720×1600 pixels and an aspect ratio of 20:9. Realme C25S is powered by an octa-core Mediatek Helio G70 processor. It comes with 4GB of RAM. The Realme C25S runs Android 11 and is powered by a 6000mAh battery. The Realme C25S supports fast charging. As far as the cameras are concerned, the Realme C25S on the rear packs a triple camera setup featuring a 48-megapixel primary camera with an f/1.8 aperture; a 2-megapixel camera with an f/2.4 aperture, and a 2-megapixel camera with an f/2.4 aperture. The rear camera setup has autofocus. It has a single front camera setup for selfies, featuring a 8-megapixel sensor with an f/2.0 aperture. The Realme C25S runs Realme UI is based on Android 11 and packs 128GB of inbuilt storage that can be expanded via microSD card (up to 256GB) with a dedicated slot. The Realme C25S is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. The Realme C25S measures 164.5 x 75.9 x 9.6 mm (height x width x thickness) and weighs 209.00 grams. It was launched in Water Gray and Water Blue colours. Connectivity options on the Realme C25S include Wi-Fi, GPS, Bluetooth v5.00, Micro-USB, 3G, and 4G. Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, proximity sensor, and fingerprint sensor.