if you don't have active broadband on your line then the router will nor connect to broadband nor the internet.
I think the reference is to the availability of BTFON/Openzone but it will need to be from another customers hub - if there are any around you they will apear on your wifi networks available. you can login to BTFON with your primary btemail address and password
I think BT mean that if you have a BT Broadband Product then you can access any BT Wifi/ BT Fon / BT Openzone Hotspots.
The Wifi Hotspots are transmitted by other BT Home Hubs that are in the Fon Community and Business may have a BT Openzone Hotspt.
Look out for the following BT Wifi SSIDS
BTFon (changing to BTWifi-With-Fon)
BT Openzone-H (changing to BTWifi)
Is your line not activated yet?
If it is not activated then your broadband will not connect and your landline will not work