Do they provide the modem for rental or i've to buy it for outright price....if so can i buy it outside
I am using a wifi modem ( AR800V v3.0) from BSNL for Rs. 80 per month rent. A non wifi modem costs Rs. 50. If you plan an outright purchase, it costs Rs. 1,800 and Rs. 1,100 respectively.
It is not wise to get a 3rd party modem. If any complaint arises, BSNL will blame it on your modem and will not support or help you solve the issue even if it is not modem related.