I have previously used many network likes BSNL, aircel, vodafone. But from 3 years I am using idea network the service of idea is excellent. it also have calling rates at nominal rates. It has a wide area for its signal provider, very good internet speed, amazing internet quality.It works fast even in 2G also. According to me idea suits for all. It has best network.I would suggest you to go for idea as idea lives good coverage. It is helpful and always will be.