The Samsung Galaxy S21 mobile phone was released on January 14, 2021. The mobile phone comes with a 6.20 inch touchscreen with a resolution of 1080x2400 pixels with a pixel density of 421 pixels per inch (ppi) and an aspect ratio of 20 :9. The Samsung Galaxy S21 is powered by a 2.2GHz Samsung Exynos 2100 processor that features 3 cores clocked at 2.8GHz, 4 cores clocked at 2.2GHz and 1 core clocked at 2.9GHz. Comes with 8GB of RAM. The Samsung Galaxy S21 has Android 11 and is powered by a 4000mAh battery. The Samsung Galaxy S21 supports wireless charging as well as proprietary fast charging. As far as cameras go, the Samsung Galaxy S21 on the back packs a triple camera setup with a 12-megapixel primary camera with an f/1.8 aperture and a 1.8-micron pixel size; a 12 megapixel camera with an f/2.2 aperture and a 1.4 micron pixel, and a 64 megapixel camera with an f/2.0 aperture and a 0.8 micron pixel size. 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 runs One UI 3.1 is based on Android 11 and packs 128GB of built-in storage. The Samsung Galaxy S21 is a dual-SIM phone (GSM and GSM) that accepts Nano-SIM and Nano-SIM cards. The Samsung Galaxy S21 measures 151.70 x 71.20 x 7.90mm (height x width x thickness) and weighs 171.00 grams. It was released with the color Phantom Violet. It has an IP68 rating for dust and water protection. Connectivity options on the Samsung Galaxy S21 include Wi-Fi 802.11 a/b/g/n/ac/Yes, GPS, Bluetooth v5.00, NFC, USB Type-C, 3G and 4G (with support for Band 40 used by some LTE networks in India). Sensors in the phone include accelerometer, ambient light sensor, barometer, compass/magnetometer, gyroscope, proximity sensor and in-display fingerprint sensor. The Samsung Galaxy S21 supports Face Unlock.