Warehouse Mobile recently cut their 1GB Mobile Data packs to $4, which is probably the cheapest way to get mobile data right now if you're a heavy data user. Data expires after 31 days. This is a great way to get extra data if you have a data device (Tablet, Kindle, Laptop etc), a second phone or a dual-SIM mobile phone.
Also on discount is the 4 hours talk time pack for $4.
So does a $4 SIM come with said plan by default/$4 credit or do it cost you $8 for initial setup?