Having the same issue here, was given the Hub 5 and connected it yesterday, and had no phoneline. Called 151 and was advised we need an engineer as (by the rather accusatory tone I received) I've obviously done something incorrect.
Roll around to this morning and I find this thread, only find other people with the same issue, that the Hub 5 doesn't even support landline calling!
So I pop on the phone, finally get through to someone who says the Hub 5 is great, and I can't use my Hub 3 anymore and he can only enable it to work until the engineer comes to install the Hub 5 for me correctly.
Can anyone help me before the engineer comes and wastes his time and possibly charges me £25 because of there being no issue except the Hub 5 is a half finished product?