I am using idea sim from past 3 years, its network is quite remarkable in remote areas because I travel a lot I did not face any signal problem call drops are very less compare to other operators though tariff is little bit higher side but it is understandable as it covers all the remote areas aggressively I love idea app as it is offering on the go recharge and 1 GB 3G internet free. I highly recommend idea network for the frequent travellers in india