AirCard Watcher is unable to authorize the use of this device. Please check your Internet and Firewall settings.

sierra_320u_4g_lte_stick_testra_optus_4g_usb_aircard_320u_1__1 The Sierra AirCard Watcher software is bundled with the Telstra TurboCard series of devices.   When the Sierra Watcher software starts up, the software goes out to a Sierra licensing server and checks whether you’re authorised to use the software.

Netgear purchased the Sierra Aircard assets in April 2013.
And guess what
Netgear did just before Christmas 2013 break?  

They took the Sierra licensing server offline in order to migrate it to a Netgear server.  Thus breaking the Telstra Sierra Aircards we use.

The supplied workaround?  Download the latest Aircard software from Netgear.