Bsnl Broadband is one of the biggest isps in India right now.It network spreads all over the country and you can be a subscriber of bsnl if you stay anywhere in India.
In my personal experience I just hated the service it provided.It insanely charges you a lot of money if you use any of their limited plans.Their internet connection is very poor and occasionally the connection was switched off purposely in order to reduce the network usage.They derive the customers of their rights.I used rs 750 unlimited plan and the bill was about rs 780 .They provided a constant 50 kbps connection with such a huge sum of money which I paid monthly.It is not at all a reliable network and their customer service is the worst.You will not find any help from the customare care.I recommend you to stay away from bsnl if you want to save your hard earned money.
Thank you!