Best Value portable 3G Wi – Fi Modems:-

you're travelling in Australia and still paying for hotel internet, you're not only wasting your money – you're missing out on the convenience of having the internet on tap, anywhere and anytime.
One of the newest developments in this area is 3G Wi-Fi modems which work like a personal wireless hotspot -- to which you can connect any laptop, tablet or even a smartphone using Wi-Fi.
They're an evolution of 3G USB modems, but with the benefit of turning the 3G signal into a password-protected Wi-Fi signal that can be shared among several devices at the same time. They're also battery-powered, so you can enjoy several hours of internet even if there's no powerpoint at hand.
In the United States, they're marketed with the catchy name "MiFi" -- a play on Wi-Fi. In Australia, telcos have opted for the more literal "portable Wi-Fi" or "mobile Wi-Fi".