Airtel has wide good network but its more expensive.good internet speed. but more exp.for calling has good network .
Airtel is the best network for the calling. int the airtel callimg rate is verry high.and the to reduce the calling rate high prices are need to paid.as compare to other network operator the price of reduce to calling rate is high.
As last 4 year I use the airtel operator as calling service the airtel is the best network as compare to other network provider but in the internet service the airtel is more expensive as compare to other network provider.
so I suggest to use airtel for important work to internet.and for the calling use other network.