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This is getting repetitive. Every time we review a wireless broadband dongle we begin by pointing out the fact that this new modem is actually exactly the same as the last modem we reviewed from one of the competing carriers. It was the same with the last generation of "soap-on-a-rope" styled broadband dongles, and guess what? It's the same story here now: this new Optus USB modem is exactly the same as the modem currently offered by and bundles with their wireless broadband plans.
Aside from the advantage of a slimmer, more attractive design, one of the major differences over the previous generation USB modems is the inclusion of a microSD card reader on the side. So obviously, you will need to buy a microSD card to make use of this feature, but on the upside you won't be restricted to a static capacity, instead you will be able to "hot-swap" these cards.
The Optus wireless modem also comes bundled with a USB extension cable. In a way, using the extension cable defeats the purpose of buying this modem over the previous generation as the new slim design removes the need for a short-wired connection. However, during our review it became obvious that people who intend to move their PC frequently, for example those who schlep their laptops around the house, may want to use the laptop to save the USB connection snapping off after being accidentally bumped.
If all the available wireless broadband modems are the same then it is surely the network performance that separates them. The trouble is that this is such a contentious feature to test, as there are dozens of variables that could negatively impact performance.
In an effort to be as thorough as time would permit, we took the Optus USB modem on a short road trip around a selection of Sydney suburbs. Beginning in the CBD we drove into the Inner West and then out to the beach at Bondi, stopping roadside to perform speed tests. We then headed north, across the Harbour Bridge to Naremburn where we had heard reports of poor Optus network reception using last generation's USB broadband modem.