In-depth review: Virgin Broadband's home HSDPA broadband service | APC Magazine: "As a sidenote, one interesting possibility with the modem is the ability to forward all calls on the modem's landline number to a Virgin Mobile number. Since all calls to Virgin Mobile numbers are free of charge, you then effectively have a mobile phone with a local number attached to it. To achieve this, you have to take the SIM card out of the modem, put it in a mobile phone and set the call forwarding rules (I tested this, and it worked.) It can't be done through the modem interface, as it doesn't have any settings for call forwarding, and the regular Telstra landline call forwarding code *21[number]# didn't work when dialled."
A cool tip.