The Nokia G21 comes with a single front camera setup for selfies, featuring an 8-megapixel sensor. The Nokia G21 is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. Connectivity options on the Nokia G21 include Wi-Fi, NFC, USB Type-C, FM radio, 3G, and 4G. Sensors on the phone include accelerometer, ambient light sensor, gyroscope, and proximity sensor.