I am using this network from last years and I have great expirence with the Airtel.They have not strong network but it reaches anywhere and found you.The 4G service is low class, its speed is as 2G network. The custtomer service is so good they help you for your any problem.mostly I like Airtel for there scheme of 121. The recharges are very low.So it suits to anyone pocket.So I suggest you to take it for calling and network, but not for internet connection.