Vivo Y91i comes with Android Oreo v8.1 Os, 5.9 inches IPS LCD capacitive touchscreen, 16 Millions colors and 720 x 1520 pixels resolution + 270 ppi pixel density, It has Starry Black and Blue colors, Dual SIM (Nano-SIM, dual stand-by) Slot supports 2G, 3G and 4G LTE network.
The Smartphone has Dual 13MP + 2MP, autofocus rear camera having geo-tagging, touch focus, face detection features and 8MP front camera for selfie experience.
Vivo Y91i has Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53) processor, Qualcomm SDM439 Snapdragon 439 (12 nm) Chipset and Adreno 605 GPU.
It has 2GB RAM and 16GB internal Storage and support up to 256GB Micro SD card. It brings Bluetooth v4.2, A2DP + microUSB 2.0 and 3.5 mm Audio jack.
Here is Li-lon 4030 mAh non-removable battery but no fast charging and wireless charger support.
The Smartphone has Face Unlock, fingerprint, accelerometer, gyro, proximity and compass sensors.