The Nokia C21 comes with a 6.52 -inch touchscreen display offering a resolution of 720x1600 pixels and an aspect ratio of 20:9. Nokia C21 is powered by an octa-core Unisoc SC9863A processor. The Nokia C21 runs Android 11 (Go edition) and is powered by a 3000mAh battery. The Nokia C21 on the rear packs an 8-megapixel camera. The rear camera setup has autofocus. It has a single front camera setup for selfies, featuring a 5-megapixel sensor. The Nokia C21 is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. The Nokia C21 measures 169.90 x 77.90 x 8.80 mm (height x width x thickness) and weighs 195.00 grams.
The Nokia C21 includes Wi-Fi 802.11 b/g/n, GPS, Bluetooth v 4.20, USB OTG, Micro-USB, 3G, and 4G.