Sophos Client Firewall and 3G NDIS

Hi,

What is the meaning of the following statement (from the release notes):

- Sophos Client Firewall does not support the “mobile broadband” driver

Does it mean Sophos Client Firewall does not support the NDIS driver?

What exactly happens when a computer is using that kind of driver? Will the firewall allow all the traffic? Can the client fallback to the Windows Firewall? Exactly how can we overcome this limitation?

Thanks.