BSNL is the oldest network when compared to the other networks and it is a public network operator. I am using this network from 2 months being ported from vodafone due to best offers offered by bsnl customer care but later I felt vodafone or other networks are the best over bsnl network because there is a lot of signal problem when I travel to my home town and In some places we don’t have network at all.
I got call from bsnl and asked me to port to bsnl network in return they offered me unlimited calls and 30 GB data per month after when I got port to bsnl Calls connectivity is very poor and they cheated me by limiting only 150 mins and 500MB per day. What a business they are making by cheating.
Even their 3g network works as 2g network of other operator and even caller voice won’t be clear in week network places.