If you are a BSNL broadband user you can change your Broadband plan online. Actually you can do a lot more regarding your BNL connection online such as changing the Landline plan, Check Bills, Payments and many more.
Here is the URL for the services. There are different URLs for 4 regions
http://selfcare.sdc.bsnl.co.in for BSNL South Zone.
http://selfcare.ndc.bsnl.co.in for BSNL North Zone.
http://selfcare.wdc.bsnl.co.in for BSNL West Zone.
http://selfcare.edc.bsnl.co.in for BSNL East Zone.
Open the URL corresponding to your region. If you are accessing it for the first time, Register for a new account. You will have to get your Customer Id, which you can find on the Monthly bills
User Id requires at least one digit
Password minimum length is 8 characters with at least one digit
After registration login and select Service tab from the top
From the list of services select “Submit a service request”
From next Screen, select The service Id, click the button and click OK to choose the customer account
Select Service type
The services available are
New Broadband connection
Change Landline Plan
Change of Broadband plan
Change of BB Accessories
Change of BB Facilities
Change of IN Facilities
Change of Landline Accessories
Change of Landline Facilities
Change of FTTH Voice Plan
Change of FTTH BB plan
Change of IN plan
So if you want to change your Landline rental plan you can do that also from here. Here you can change “Change of Broadband plan” and select a new broadband plan by clicking on the button
A popup with available plans will displayed when you click on the button, choose the one you wanted and click OK
Enter Summary and Description (optional) and Submit.
You will receive a service request number, and you will receive a call from BSNL to confirm the request, After the confirmation your plan will be changed to new one. If your existing or new plan is a combo one, the change will be affecting only after current billing cycle.