Yes. You can utilize Rs. 50 voucher, one at a time via MyJio App only, to buy new recharges of Rs. 300 and above plans and on Rs. 101 data add on pack.
If you recharge with Rs 398 and above plans via MyJio app, you will be eligible for the additional cashback vouchers worth Rs. 400 (Rs. 50*8) as per the current offer.