I am also using Idea netsetter for the last one year.
Idea plan are too costly. Their prepaid plan starts from Rs.299 and Rs.600 per month for unlimited usage. But in the same circle Aircle is charging only Rs.97 per month for unlimited internet. I unlocked my modem and now I am using Aircel sim in it, I suggest you to unlock your device and use any other cheap service like Aircel. the Aircel plan is very good I wish all go for Aircel SIM.
There are lots of offers available in Aircel according to usage of user. Plz enjoy plan u required and pay less.