amsung Galaxy A21s smartphone runs on Android v10 (Q) operating system. The phone is powered by Octa core (2 GHz, Quad core, Cortex A55 + 2 GHz, Quad core, Cortex A55) processor.It runs on the Samsung Exynos 8 Octa 850 Chipset. It has 4 GB RAM and 64 GB internal storage , expandable Yes Up to 512 GB via microSD card.