Yep - unlimited. It's a new company called GigaComm which have their own 5G infrastructure and rely on bouncing singals between their towers in densely populated areas around/near the CBD, and then install their own fibre wiring within the buildings so you aren't relying on much legacy copper wiring running from the NBN to the basement to the MDF and then up and around the apartment building.
I'm finding that the websites/servers I use though aren't able to fully saturate the connection. eg. I did a new Win11 install and went to sync my OneDrive which seemed to max out at about 30-40MB/sec (but then I went and downloaded other stuff at similar speeds on Steam, Microsoft Store and BT). I had to disable my router's QoS to hit these speeds otherwise it drops down to about 600Mbps, but the flipside is last night my wife's Netflix dropped to like 480p due to no QoS to ensure that some bandwidth was being set aside for streaming.