On my Optus bill in the Broadband Summary section, it says that to get more info on the plan, enter the Plan ID into <optus URL/allCIS>. When I enter the ID 604222 (that's what's on the bill) it comes back as :
Your search for Plan ID "604222" found 0 Critical Information Summary.
Please enter a valid Plan ID number or Contact us.
Anyone care to enlighten me about what I'm supposed to do next to get the info about my plan?