The Samsung Galaxy S21 phone comes with a 6.20-inch touchscreen display with a resolution of 1080x2400 pixels at a pixel density of 421 pixels per inch (PPI) and an aspect ratio of 20:9. The Samsung Galaxy S21 runs Android 11 and is powered by a 4000mAh battery. The Samsung Galaxy S21 supports wireless charging, as well as proprietary fast charging. the Samsung Galaxy S21 on the rear packs a triple camera setup featuring a 12-megapixel primary camera with an f/1.8 aperture and a pixel size of 1.8-micron; a 12-megapixel camera with an f/2.2 aperture and a pixel size of 1.4-micron, and a 64-megapixel camera with an f/2.0 aperture and a pixel size of 0.8-micron. The rear camera setup has autofocus. It has a single front camera setup for selfies, featuring a 10-megapixel sensor with an f/2.2 aperture and a pixel size of 1.22-micron. The Samsung Galaxy S21 measures 151.70 x 71.20 x 7.90mm (height x width x thickness) and weighs 171.00 grams.