Earlier I was using airtel mobile network and my father and mother was also using airtel.but day by day the network got very worst.the most important thing we faced is the call drop.we were frusted using airtel and the call cost is also high.but one time I was happy with airtel.i personally worked in bharati airtel for 1 year and I was pleased at thet time 5 years ago.but now the customer care is also gone worst after repeated call you can get in touch with them.now I can say only one thing that before using airtel just check wheather there is good network in your area.