Samsung Galaxy A21s smartphone comes with a 6.50-inch touchscreen display with a resolution of 720×1600 pixels. Samsung Galaxy A21s is powered by a 2GHz octa-core Samsung Exynos 850 processor. It comes with 4GB of RAM. The Samsung Galaxy A21s runs Android 10 and is powered by a 5000mAh non-removable battery. The Samsung Galaxy A21s supports proprietary fast charging. As far as the cameras are concerned, the Samsung Galaxy A21s on the rear packs a 48-megapixel primary camera with an f/2.0 aperture; a second 8-megapixel camera with an f/2.0 aperture; a third 2-megapixel camera with an f/2.4 aperture and a fourth 2-megapixel camera with an f/2.4 aperture. It sports a 13-megapixel camera on the front for selfies, with an f/2.2 aperture. The Samsung Galaxy A21s runs One UI based on Android 10 and packs 64GB & 128GB of inbuilt storage that can be expanded via microSD card (up to 512GB) with a dedicated slot. The Samsung Galaxy A21s measures 163.60 x 75.30 x 8.90mm (height x width x thickness) and weighs 191.00 grams. It was launched in White, Black, and Blue colours. Connectivity options on the Samsung Galaxy A21s include Wi-Fi, Bluetooth v5.00, and NFC. Sensors on the phone include fingerprint sensor.