No. Vivo S1 is not a waterproof mobile phone. However, plenty of covers available for the mobile which can protect from sudden water splash.
Vivo S1 has ARM Mali G72 MP2 dual core GPU.
No. Vivo S1 does not have any association with Dolby sound.
Vivo S1 standard packaging box contains - Vivo S1, Earphone, USB Cable, USB Power Adapter, Protective Case, Protective Film (applied) and a user guide.