The HTC Desire 21 Pro phone comes with a 6.70-inch touchscreen display with a resolution of 1080x2400 pixels and an aspect ratio of 20:9. The HTC Desire 21 Pro 5G runs Android 10 and is powered by a 5000mAh battery. the HTC Desire 21 Pro 5G on the rear packs a 48-megapixel primary camera with an f/1.8 aperture; an 8-megapixel camera with an f/2.2 aperture; a 2-megapixel camera with an f/2.4 aperture, and a 2-megapixel camera with an f/2.4 aperture. The rear camera setup has autofocus. It sports a 16-megapixel camera on the front for selfies. The HTC Desire 21 Pro 5G is a dual-SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM cards. The HTC Desire 21 Pro 5G measures 167.10 x 78.10 x 9.40mm (height x width x thickness) and weighs 205.00 grams.