Vivo S1 is now available in India through Amazon.in and Vivo's e-Store. The smartphone will also be available through Flipkart, but the listing is yet to be announced. Vivo S1 introduces three memory versions - 4GB/128GB, 6GB/64GB, and 6GB/128GB. Right now, only the base model is available for INR17,990. The top-end model is priced at INR19,990, and you will have to pay INR18,990 for the 6GB/64GB variant.