Released in December last year, the Vivo X100 is a phone that looks the part and is pretty reliable when it comes to camera prowess. Vivo X100: 4 reasons to buy — Camera king: The Vivo X100 boasts a quad-camera setup co-engineered by the renowned optics brand, Zeiss. So, with the 50MP main sensor and Zeiss optics pairing, the Vivo …