The A21s line consists of SM-A217F, SM-A217F/DS, SM-A217F/DSN, SM-A217M and SM-A217M/DS. Key upgrades over the previous model, the Samsung Galaxy A20s, include the new Exynos 850 chipset and an improved camera setup.
The Galaxy A21s has a 6.5″ PLS TFT LCD Infinity O display with HD+ 720 x 1600 resolution, 20:9 aspect ratio, ~270 ppi density. The phone itself measures 163.7 mm (6.44 in) x 75.3 mm (2.96 in) x 8.9 mm (0.35 in) and weighs 192 g (6.8 oz). The phone is powered by Exynos 850 (8 nm) SoC (System on a chip) with a octa-core (4×2.0 GHz Cortex-A55 & 4×2.0 GHz Cortex-A55) CPU and a Mali-G52 GPU. The phone comes with either 4GB or 6GB RAM as well as 64GB or 128GB internal storage, which can be expanded via a microSD card of up to 512GB. It comes with a non-removable 5000mAh lithium polymer battery which charges with a 15W Fast Charger. It also has a rear-mounted fingerprint sensor.
The Samsung Galaxy A21s has a four camera setup arranged in an “L” shape located in the corner with a rectangular protrusion similar to that of the iPhone 11 and the Pixel 4. The array consists of a 48 MP wide angle camera, an 8 MP ultrawide camera, a 2 MP macro camera, and a 2 MP depth sensor. It also has a single 13 MP front facing camera, which sits in a small punch hole on the front of the screen. The rear facing cameras can record video up to 1080p in 30 fps. The front cameras can shoot 1080p at 30 fps.
The Galaxy A21s originally came with Android 10 and One UI 2.5; the current version comes with Android 12 and One UI 4.1. The phone has Samsung Knox 3.7 for added system security.