The Vivo S1 is a mid-range smartphone from Vivo that features a large 6.53-inch display with a resolution of 1080 x 2340 pixels. The handset is powered by the MediaTek Helio P70 chipset and comes with 4GB of RAM. For storage, the Vivo S1 gets 128GB of internal storage and gets a microSD card slot for additional memory expansion. The phone runs Vivo s FunTouch OS atop an Android 9 Pie core. The Vivo S1 also boasts of a triple camera setup at the rear and a 25-megapixel front-facing camera for selfies and video calling.