Mahit Huilgol March 19, 2018 News Vivo X21 and X21 UD Launched in China, Features a 6.28-inch FHD+ Display and Jovi Smart Assistant Vivo X21 comes with dual rear and front camera units. The Vivo X21 features a 6.28-inch FHD+ display and is powered by Snapdragon 660. Read on for…