I share my bad experience with Airtel data card. When I purchase a data card then I recharge RS 448 and when I browsing then it show(hmm, we cannot reach this page check your internet connection) then I immediately contact to Airtel helpline number for this inquiry and they says that you cannot recharge RS 448 then I say I found a message form Airtel, they says that it could be mistake sorry, recharge again.
My previous rupees wastage then I does not use this data card I buy another one.
So my opinion is please don't use there service because I am very upset about the internet service.