Vivo S1 Pro is powered by an octa-core Qualcomm Snapdragon 665 processor. It comes with 8GB of RAM. The Vivo S1 Pro runs Android 9 Pie and is powered by a 4500mAh non-removable battery. The Vivo S1 Pro runs Funtouch OS 9.2 based on Android 9 Pie and packs 128GB of inbuilt storage.