Mailing them emails and phone calls etc isn't gonna work so much.
Deep, if you are willing to do a bit of work then this is going to be much better.
Go to
Right to Information Act (India) and read about the Right to Information act.
According to the Right to Information act you can ask MTNL on any information you want and they MUST reply back within 30 days or so. Read the site in detail and prepare a good application. Ask for as details and statistical data. Such an application can really wake up those MTNL authorities.
Send an application to MTNL asking them for the following information
Why is the 590NU plan capped at 256Kbps?
Why are they not offering any unlimited plan?
How many subscriber do they have of 590NU?
What percentage of total bandwidth has been used by such users?
What are they doing to increase their bandwidth?
What effect would an increase in bandwidth on this plan have?
Here is a sample application I found.
Right to Information Application on Solid Waste Management collection, transportation and disposal
It would be great if anyone here could offer legal advice. You can PM me if you need some help.
btw I had seen the MTNL site before and it mentioned 590 NU as "256 Kbps upto 2Mbps"
now it only says 256Kbps