I'm on three mobile and the data side I was only using at respawn and it gets X'y.
I bought a Virgin prepaid USB $49, 4 gig to start with including modem, unlocks after $80 prepaid load, Piggy backs on Optus, which claims 97% coverage
http://www.virginmobile.com.au/broadband/p...bile-broadband/I top it up when I need to use it, normally just for respawn but i also use it when traveling and as a back up on my router.
$20 gets you a gig for a month
Comes in handy when steam wants to update at Respawn.
Telstra is a rip off and the coverage issues hasn't been a factor for years every network has it's black spots.