To change the user name and password-
You have the option of selecting your user name when you login for the first time using your UserId. You cannot change your Username thereafter. Password can be changed as often as you need through the portal.

If you forgot your password-
On your BroadNet portal, please click on the forgot password. Enter your BroadNet user id, and then select your secret question from the drop down list of questions. Select your answer to the question. If the answer is correct, you will be shown the password on the screen and password will also be emailed to "alternate Email address" mentioned by you at "My account" section of the portal.

ho! ho! reliance net connect,one of the worst services in India.