This article and video explains How To Find Telstra Air® Hot Spots.
Download the Telstra Air App from iTunes or Google Play. Login to the Telstra Air App using your Telstra ID.
To find public hotspots in your area on the Telstra Air app tap Find Nearby Hotspots to open the map. You can also search an area by entering the suburb or postcode into the search bar. A map will appear with hotspots in that area.
Alternately you can go to telstra.com/Air, select Find a Hotspot and enter your postcode.
Once you've found a hotspot (provided you're logged in to the Telstra Air app) you'll automatically connect when you're in range.
Some devices require you select the Telstra Air Network from the available Wi-Fi networks. Go to Settings and select Telstra Air from the available Wi-Fi networks then return to the Telstra Air App and you'll start connecting.