The phone 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.