Airtel 4G LTE is excellent in metro city. I am in Mumbai and very rarely I found network was weak in the city area. Internet uploading and downloading speed is very good and some times it crossed the 2MB speed per min. I can download 100 mb file with in 3mins only with this network.
Work much better than competitors and very reasonable recharge for the prepaid user in price of 199, 299, 349, 499 and 507 Rupees for unlimted calls and ineternet browsing experience.
I recommend you can try and enjoy the great network in cities with Airtel 4G LTE