The vivo S1 is a mid-range smartphone released in 2019.

It features a 6.38-inch AMOLED display with a waterdrop notch and an in-display fingerprint sensor. It is powered by the MediaTek Helio P65 processor and comes with 4GB of RAM and 128GB of storage. The S1 has a triple rear camera setup consisting of a 16-megapixel main sensor, an 8-megapixel ultra-wide-angle lens, and a 2-megapixel depth sensor. On the front, there is a 32-megapixel selfie camera. The phone is fueled by a 4500mAh battery with 18W fast charging support. It runs on Android 9 Pie with Funtouch OS 9 on top