Vivo S1 is available in 2 color variants - Diamond Black & Skyline Blue.
Vivo S1 has a weight of 179 grams.
Vivo S1 has 6.38 inches of AMOLED Full HD plus display. It is further protected with Corning Gorilla Glass 5 level of protection. The mobile has a 90% screen-to-body ratio and has 19.5:9 aspect ratio. Vivo S1 offers 404 PPI of resolution.
Yes, Vivo S1 has dual 4G VoLTE support.