Vivo S1 is a very smart and useful so I can find my device display and camera clearly powerfully. Touch is very responsive. Camera is very good only in day light conditions. Battery is awesome, overfall nice phone with better raw management, with 6GB RAM. Excellent mobile. its worth of money camera performance front and back was awesome. fingerprint and face detection is very speed. Extraordinary turbo charging. Nice product styley and nd good finishing. Everything is osm. As expected. and happy with it.??