Update: please read the comments in this thread - there have been numerous reports of mistakes being made during AND after the order.
Telstra unlimited cable broadband 50/5 Mbps now $89 per month with all setup fees waived.
This is the cheapest non-contract cable broadband from Telstra I have seen.
You get unlimited 50/5 cable internet, free latest modem, and free calls to landlines and mobiles in Australia (and a free Google Home Mini if you signup before Dec 25th).
I will be getting this while I wait for HFC NBN to be available in my area.
Ps. This is an online only deal, not sure if you can get it from a Telstra shop.
Also, this deal applies to new customers (although the website only mentions moving home).
Edit 1: Current Telstra customers - after reading the comments it appears that at least one current Telstra customer was able to get this deal applied as well, by chatting with an agent online.
Edit 2: Non-cable internet - this offer applies to all broadband connections, not just cable (according to a few comments in this thread).
I entered my address, chose the plan, when asked if I was an existing customer I clicked 'No' and I got a 'Good news we're waiving the $240 setup fee for you'message.
There have been numerous reports that sometimes the discount is not applied, others report (as has been my experience) that various discounts will be applied when using different browsers/devices (even by the same person).
I have had anything from $0 to $99 to the full $240 setup payment depending on device/browser before I was able to get the full discount - So if you're a new customer enter your address and check for yourself if it works for you.
If the link provided doesn't work, try this one (which is essentially the homepage for this offer) https://www.telstra.com.au/latest-offers/moving-offer
Not sure what they mean either - the coaxial box/connection is used only for HFC NBN. Maybe they meant when it switches over to NBN.
The 4G backup is not bad (here). The speed you get from that will probably depend, in part, on your distance from the tower (often not the same distance as the exchange).
I'm not sure what I got from the backup 4G. I posted it in this thread somewhere before. It was either 5 or 15, probably 15 but I can't remember now.