The Vivo X21 is powered by 2.2GHz octa-core processor and it comes with 6GB of RAM. The phone packs 128GB of internal storage that can be expanded up to 256GB via a microSD card. As far as the cameras are concerned, the Vivo X21 packs a 12-megapixel primary camera on the rear and a 12-megapixel front shooter for selfies.
The Vivo X21 is powered by a 3200mAh non removable battery. It measures 154.50 x 74.80 x 7.40 (height x width x thickness) and weighs 156.20 grams.
The Vivo X21 is a dual SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, USB OTG, 3G and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Compass/ Magnetometer, Proximity sensor, Accelerometer, Ambient light sensor and Gyroscope.