I am living in thrissur district kerala. I use 500 combo plan the speed is superb. I get 240kbps downloading at mornings [0200 hours to 0800]. And 180 - 220kbps at day time. The connection is limited [1.5 GB/month] but not fully limited its free from 2 am to 8am. I wake up at 5.30 am and I still get enough time to download 2 movies worth 700 mega byte
I pay 500 rupees per month. I get 175 calls free on my landline
The support from bsnl is very good, if any problem happens bsnl guys would have fixed it even before we notice it I strongly recommend you to have this connection if this plan is available in you locality.