No. Vivo S1 does not have Qualcomm Snapdragon processor but it has latest the latest MediaTek P65 octa-core processor.
Yes, Vivo S1 has dual 4G support. You can use 2 4G network sim cards at the same time.
Jio offers benefits worth Rs.10,000 on Vivo S1 mobile phone.
Yes, Vivo S1 does have the Corning Gorilla Glass 5.