I went to Officeworks to get the Optus 4G modem for $29 as posted here: https://www.ozbargain.com.au/node/259024, and found the price has been reduced to $24.50. Got two. There were heaps in stock at Elizabeth Street (Melbourne), but none at Bourke Street. As confirmed by previous poster, they come unlocked.
The Optus Huawei E5573 4G WiFi Modem allows you to enjoy 4G speed Internet even when you're on the go. It allows you to connect up to 10 WiFi enabled devices so you can check your emails, surf the web, login to your social media and get your work done from almost anywhere in Australia. Comes with 4 GB of included data with 14 days expiry for use within Australia..
You can connect to the modem with up to 10 WiFi devices simultaneously.
It has an easy 1 touch setup button.
The battery has a large 1500 mAh capacity to last for up to 6 hours working time and up to 300 hours on stand by.
The design is light and thin so you can easily carry it with you.
It supports up to 4G speeds of 150 mps.
It also supports a mobile app with a barcode scan feature so you can quickly connect.
Lowered so they don't have to PB Coles. :)