Good day @billwharton,
Welcome to TPG Community!
There will be no fee or contract reset when you upgrade or downgrade your NBN plan.
Our NBN100 plan comes with Unlimited data with a Typical Evening Speed of 78.1 Mbps which is great for multiple users at the same time, HD streaming and gaming. You can get this for as low as $89.99/Month.
Our Change of plan team can help us with the process. You may shoot me a private message with your contact details (preferred time and best number) and I will arrange a call from them. :)
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