Aircel is one of the mobile network company which provide you network in very cheap rate. But I have to say their services are also very cheap. Very bad network, most of the times voices in calls are not clear. You have to try 2 3 times to connect a call, network too poor that sometimes it does not show any network inside any building or apartment.
So I have change my service provider and port to vodafone. I will not suggest to use aircel.