The Vivo X21i was announced in 2018, May With 6.28 inches, 98.4 cm2 (~85.0% screen-to-body ratio) Super AMOLED, Powered by Mediatek MT6771 Helio P60 (12 nm) and running Android 8.1 (Oreo), Funtouch 4, the device delivered smooth performance and multitasking capabilities. while the Li-Ion 3425 mAh, non-removable ensured long-lasting usage.