Hi and Welcome![QUOTE=ncc123;2492571]
I need to unlock the BT Voyager 105 frame ware, to get it work on Windows XP (SP3), vista, and windows 7.[/quote]You need no “unlock”, you need drivers.
Please note that this product is not Microsoft Windows Vista compatible.
XP drivers are available there.
So if you want to use Windows 7, you need a new modem. A broadband router is the better option, since it is operating system independent.