I am using BSNL’s Student CUG plan 148 from last 4 months as it offers so many services with low cost. Apart from its internet service all are best and really affordable. Now lets talk about its internet service, as BSNL’s says about its service is that "faster than your thoughts". yes it is fast and slow at some time. you can see its speed varies from 200 KBps to 30-40 KBps and same time, and it takes so much time to get connected, and most of the time it gets stuck when you really need to access the the internet.
Network coverage is good at some places but it loose connectivity as you entered in deep rooms.
And some times it shows that emergency calls only though there is network in the phone.
Overall I didnt like the internet service of BSNL apart from these all are good at I liked it very much.