The openreach engineer opened one cover and declared it was good to go?
Without opening all the covers up and seeing where the lines are going they cannot say its ready as you may have a cable running from your home, past the cover the engineer lifted and stoping at the next cover waiting for another cable to be run to that point. The only way to be sure would be to ask other people in your block if they have service yet.
The last post by me was a sarcastic one as Bt are a pretty **bleep** as a service company and that an engineer of bt told me there is no problem. And I found that death trap was trying to stick up for them.
I was just saying that the just because an openreach engineer lifted up one cover and had a peek doesnt mean the lines are connected yet.