Idea is great .
This is the only network which I was used for long time .idea gives clear voice quality calling.The msgs are deliver instantly .Data services are however nice.Cost is not so high.
Many tariff plans are also helpful for lowering the cost .
Customer services are also good as compare to some other networks.
Now it was also run in 4g lte .
The towers of idea are available all over the india .so netwok problem cannot be happend at all. . idea also plans in lowers the charges in calling .