The Vivo Y91i is an addition to the brand's Y-series. The phone packs a 6.22-inch HD+ full in-cell with 1520x720 pixels resolution and an aspect ratio of 19:9. An octa-core MediaTek Helio P22 (MT6762R) chipset powers the device with 2GB of RAM and 32GB of internal storage. It has a 13MP rear camera and a 5MP front-facing camera. A 4,030mAh battery backs the phone. Software segment is handled by Android 8.1 Oreo-based Funtouch OS 4.5.