@debdutta95 Don't go with Tikona. You'll be able to talk to their customer support whenever you want, but they will only ever ask you to "turn your adapter off and on again", and even if they send an engineer your way, they will have no real knowledge about anything, much like BSNL.
After researching a lot, I don't think I would go with them anyways and more importantly I need a reliable broadband service and wireless is a big flop on reliability grounds.
I am currently using Photon+ for surfing and downloading when BSNL gives up opening sites. However I am on 5GB limit with Photon, so cannot use it for a full month.