Well I went for device 3,000 rs and 3-month bundle 4000 (24 GB per month) which I had previously and the cost was 7,000.
However, I was offered 50GB, six month package of 2,500 rs per month (priced 15,000 rs) for 13,000 rs and no charges for device (less 3,000) . The total would have been 18K, but I got for 13K so saving of 5,000 rupees.