I am using idea prepaid for 2 years and it is the best network that I experienced because of better network across whole india Specially in Villages.
Fast internet in 2G, 3G & 4G the data packages are high in price but gives really high speed browsing is so much fast and downloading is much better.
After upgrading to 4G idea is really the next level of internet gives around 2 mbps speed means driving a lamborghini.
I suggest if you want better network, amazing fast internet go for it.