Hello friends I am using airtel for more than 3 years and my experience with airtel is very good.Airtel provides you a very excellent internet speed , Airtel 3G even work as 4G .Airtel has network everywhere and there is not any network issue .Airtel offers us a very cheap call rate. Airtel gives me a unlimited plan of unlimited calling and 1Gb/day Net at just 349rs .Airtel is the best network for 4G smartphones The airtel app is also best for all the smarthphones .Please dont think just switch to airtel.They have a perfect customer service and you will get 100% satisfied with airtel.