Mifi

From AAISP Support Site

The mifi is a great device to bridge a mobile 3G/4G connection and a wifi - allow your wifi enabled computers to share the single 3G data sim for internet access - ideal as a simple fallback in case of ADSL problems.

The settings are all straight forward, the settings page is close to default!

MiFi Settings screen

If it can't connect, try setting the APN as per Data SIM Features