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Hi @stefanzammit . Have you been notified that your connection is ready to go?
What lights are lit on the NBN box and router?
Can you login to the router and set your own username and password?
@stefanzammit . Looking at other threads on this problem, either TPG have the wrong information in their system about your router or the auto config has failed. You can try a factory reset on the router and put in the three settings again.
All the lights are correct and indicate a connection to TPG but it might be to the auto config server rather than your user account.
If it still doesn't work, open a new thread as before and include the info on the lights on each box and what the username is in the router config.