The Huawei E220 USB Modem is a soap-on-rope wireless broadband internet modem for Optus, Vodafone and 3 networks in Australia.
I bought a Huawei E220 Modem on the Optus network, allowing 5GB traffic per month for 24 months on a $40 plan. The drivers are easy to install on Windows XP computers, but it is a pain on Vista. When the modem was inserted to a USB port, the program failed to detect the device. After removing the modem, then connecting it again several times, the program finally detected the device.
When connected to the internet, the connection kept timing out, ie. when you type an address into the address bar on an Internet browser, the internet refused to load the page. This was extremely frustrating, and it got worse. The speeds for downloads were very slow; the maximum speed was under 50KB/s.
This modem would be recommended for users of Windows XP and who live in a heavily populated area. However, if you use Vista or rely on this internet as your main source, you'd probably be better off using TPG's 80GB plan.