Bro check 2nd image. It says 4G+2G so dual Sim and Jio doesnot have 2G so 2G is for other operators.
And I strongly believe that Jio will not subsidise this handset, customers will have to pay full price, So no chance of Rs 500 or 1000 bcoz then people will buy this handset then throw Jio Sim and use other operators Sim, What Jio will do is bundle Jio services free(call+data+SMS) with this handsets when customers pay full price of this handset