I have been using airtel for 8 years and I am not facing any network problem in this time period. I really like airtel because it provide me a best network, even if I am in basement area ya any hills station my airtel network is always in range. Voice quality and internet quality is also awesome. customer service is easy and fast. its 4G speed is very good than others network. charges for each plan is worth. airtel is the best I can assure it. according to me airtel is the best network in all India.