Deba, there is a thread started by aneelr which contains the answer to your specific model and query. About Kolkata, not sure. But all you need is to procure the mod chip and some DIY soldering skills.
These mod chips are not available in India. You have to import them and work with a electronics shop to get it installed. As Santosh said, please check the thread started on Panasonic and Oppo mods. All links are available there.