My experiences
Worst service but best coverage in India. The mobile data plans are so expensive and the 3g network is worst. It can be used if u wanna have a journey if u are out of your state or city. Mobile data, not recommended by me! My every family member has a Idea sim but no one actually use it for data .I bought it because it is reliable and have a many service around. My father uses its postpaid service and dint had a problem till date.however I use prepaid and the plans are best accordingly. I really din’t had had any issue from the date I purchased it. Though it has one of the most unique feature about this sim is that we can get a TT loan, very useful when urgency occurs.