Thanks for contributing. Seems many are quick to blame the Smart Hub, rather than accept this is a BT problem. One of the Mods is assisting me with investigating, guess we'll see what they say next week.
Assume their decision will be one of "the hub is rubbish and to blame" or "Infinity 4 can't offer this function". Neither of which is at all satisfactory for an expensive monthly outlay.
Whichever it is, potential customers need to know this before considering BT as thir broadband provider.
Fingers crossed neither of these will he true, and they can offer a full solution. The story will be clearer in the next few days.