BSNL Mobile app hosts a variety of services provided by BSNL. After installing the app, its UI looks as under
Click on the "Accounts" section to add your BSNL Landline/ FTTH number. The Screen looks as under:
Click on the "Add Account" button
Select Landline in Services, then enter your city STD code and your fixed Landline/ FTTH number, and finally click the Submit button
The new account will be added as shown below:
Select Usage and then select Broadband.
The new account will be added as shown below:
Now move to the home screen
Select the Account
Select Broadband. It will ask for Landline/ FTTH user ID. Enter the ID and Submit
The app will show the usage as under: