The Vivo V21 5G runs Funtouch OS 11.1 is based on Android 11 and packs 128GB of inbuilt storage that can be expanded via microSD card (up to 1000GB) with a dedicated slot. The Vivo V21 5G is a dual-SIM (GSM and GSM) mobile that accepts Nano-SIM and Nano-SIM cards. The Vivo V21 5G measures 159.68 x 73.90 x 7.29mm (height x width x thickness) and weighs 176.00 grams. It was launched in Arctic White, Dusk Blue, and Sunset Dazzle colours. Connectivity options on the Vivo V21 5G include Wi-Fi, GPS, Bluetooth v5.10, USB OTG, USB Type-C, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include accelerometer, ambient light sensor, compass/ magnetometer, gyroscope, proximity sensor, and in-display fingerprint sensor.