This is right that airtel network are very good but
In case of recharge when we talk about it then we are not satisfied with airtel
Because as we know that paytm, mobikwik, freecharge etc. are the recharge partner for all telecom companies but when any offer are launched by these recharge company than a note are written as
Valid for only Non-Airtel transaction only and other thing is recharge cost for 3G and 4G networks is very high when compare with other operators.