Yet another segmented offer from Idea Cellular. If you stop doing data recharge on your number then these kind of offers pop under best offers. Check by dialing *121#. Your number must be 90days old for these offer to show up.
Prepaid STV 148 Plan
10GB 2G/3G/4G data
Valid for 28 days
Must have 4G handset
offer valid for selected customers
dial *121# to know
Idea is trying to keep it customers from moving to other operator by giving a range of offers like these. 
Others offers include Rs.396 with 1GB per day data + 3000offnet calls & unlimited Idea to Idea calls.
If you are not into calling much however need 1GB per day data then get Rs.244 offer with same 1GB per day data + idea to idea free calls.