Vivo Y91 has 3D curves which makes it a stylish and easy-to-hold device. Vivo Y91 has a 15.8 cm (6.22) screen which offers an expansive mobile viewing experience and is easy to use. The phone’s 13 MP + 2 MP rear camera system allows you to see crystal-clear pictures. It has 32 GB of ROM space which is expandable up to 256 GB via a microSD card slot.