Yes, you can use Jio 4g sim card in this phone.
Vivo V5s comes with latest Android 6.0 Marshmallow OS which has got Vivo's patented FunTouch 3.0 skin layer. Since the device is newly launched, we do not expect that company will release the new software update immediately.
Vivo V5s has ARM Mali T-860 MP2 graphic processor GPU.
Yes, Vivo V5s 64GB comes with front camera LED flash.