Free with any $2 telstra prepaid sim.
Available at over 1,000 locations across Australia
In my experience speeds of between 8Mbits to over 100Mbits depending on location
Was originally slated to end last month but has been extended to next year.
$2 sim here: https://www.telstra.com.au/mobile-phones/prepaid-mobiles/2-p…
Its a good deal but I cant find many places that offer it. In most shopping centers you get free wifi anyway. Only place I've seen it is at phone boxes and I dont like hanging around those like its the 90's all over again. Speeds were pretty good when I tested it though, got over 50mbit