Airtel 4G is the best ISP network provided by Airtel.There is no camparison with other.I am using Airtel 4G in Delhi.the speed is brilliant.I am getting the speed of 20-25 MBPS which is amazing.I am using it with dongle and I am also getting great speed on my 4G phone which is motorola moto G 2rd generation. Airtel ISP is far better than others and performance is very good.ISP support is very good.I will recommend everyone if you want to use 4G then go for Airtel, you will not disappointed.