Welcome to the largest cellular network in india and yes most costlier too. Airtel has best network in india I have used many other networks but using airtel for almost 5 years, you can literally find network everywhere in the country, its net is fastest like its 2G is almost as same as 3G of others. But it is the most costlier networks and call rates are also much higher. Overall it is worth it’s price. Plus customer service is also better than others.