Airtel the big brand is here! but the network is very dull.i am from bhopal and bhopal is the capital of madhya pradesh but in some areas of bhopal airtel is not available they failed to connect you.and they promise you to best 4g network of india.but trust me airtel has very low network of india.dont use it.if you want to 2G network then you can use airtel but if you want 3G or 4G then please change it