Yes, Vivo Y83 does have the 3.5 mm headphone jack.
No. Vivo Y83 is not a water-proof mobile phone.
No. Vivo Y83 does not have the dual camera setup. It has a 13MP rear camera and 8MP front camera.
No. Vivo Y83 has 2 slots dedicated for SIM card and a separate slot for the MicroSD card. You can expand phone storage by up to 256GB with the help of the memory card.