At first I clear that I love airtel for his network or tower range.When other network signal is not responding There airtel responds.i have 2 airtel simcard.my problem with airtel is that in both of my simcard no offers or special offers are given.but in other network in every week or month they give their customers special offers like promo free balance for one or two days.Amd now for data 50% cashback is a good thing of airtel.but one or two month ago I saw 4g advertise of airtel that airtel 4g are available in forests, mountains, hills, villages but airtel 4g is not available in my town and many villages.so finally I say that airtel network system is good but airtel offer system should improve.