Airtel is the best mobile operator I am using out of many. Its coverage area is best and reach every corner of the area. Its connectivity is very good. We can connect other mobiles very easily without any hurdel. Internet speed is good as compare to others mobile operator. Yet its charges are high as compare to other mobile operator but its service is excellent . I have not face any network problem with airtel coverage. Its 4g speed is aswome as compare to others. It is the top mobile operator in india as compare to services