Vivo Y66 runs Android 6.0 Marshmallow The smartphone has a 5.5-inch HD display The other mobile from Vivo you can look for is Vivo Y69 It has a 16MP rear camera with an LED flash and a 13MP front-facing camera The device is powered by a 1.4GHz octa-core Snapdragon 430 processor and 3GB RAM It has 32GB internal storage which can further be expanded via a microSD card up to 128GB Connectivity options include 4G, Wi-Fi 802.11 b/g/n, Bluetooth 4.0, GPS, and a microUSB 2.0 port The device is powered by a Li-Ion 3,000 mAh battery The other popular Vivo mobile you can look for is Vivo V9