CX500 : Telstra BigPond HotSpot Modem Blog :

If you happen to be in a 4G coverage zone, however, you can expect impressive speeds. We managed to achieve a top download speed of over 40Mbps, though speeds generally hovered between 22Mbps and 31Mbps on most occasions. Upload speeds during testing peaked at around 15.8Mbps (higher than Telstra's quoted 10Mbps). Telstra's 4G network is pretty reliable and coverage is extensive.