My experience so far is not very good with Airtel 4G in bangalore. Signal keeps dropping. After the download limit is over, the connection is not useful at all. slower than than dial-up(remember the dial-up speed!) . Also I feel the download limit get exhausted very very fast . Compared to BSNL, for the same usage, the amount of data used seems to be very high. 12 GB gets over within 15 days . No major change in usage pattern from my previous BSNL to now. It is too early to go for 4G .
I am planning to disconnect the service. Need to find a way to sell the CPE.