I am using Airtel from 3 years now it is good operator provide very good network all over India but the problem is that it is costly then other networks its 3G and 4G plans are most costly then other operators but the good point is they are also fast then the operators.
And another problem is whenever I go to my hometown I got problem because my sim is 3G but network there is 2G so net is very slow there and also in my village the network is very poor .in cities it is fantastic but not good in villages and remote aera. Overall good network and of course better than any other network.