Airtel is one of the most expensive networks. It prepaid cost is very high. Airtel network is very strong. You can visit any place it has found the network. Airtel has now available 3G and 4G network. Lot of people use airtel because of good network available any place.
Airtel operator are very expensive than another operator like aircel, vodafone, tata docomo etc. The airtel data is also very expensive because of the speed of the network.