As a techie in this sort of work (Not for Optus), I can only commiserate with the engineers running around trying to restore this. I've never had an incident make the news, though that's more due to luck than anything.
Coming up on 12 hours downtime, now. This is costing millions. And that's before we get to part where retail customers leave over this and cost them more.
from what I could see there were two stages - the DNS shat out, and the cellular service.
these two should...not be related. I have concerns.
My cellular service in inner Melbourne just came back up.
Edit: the signal bar had gone back up, but I wasn't able to recieve SMS until just now. The amaysim account page is still unavailable.
mine is "on" but very slow. phone says 3g connection, havnt seen that in years