Yesterday morning, I, and some colleagues, got into one of the lifts. Doors close - yes, that's as should be. Press button for level 2 (which is somewhat higher up than the raw number would indicate), and nothing happened. None of the buttons lit up, not even the one to open the doors.
Still, they got something right. They won't be having any mobile phones going off during press conferences - there's no coverage in the press theatre for any of the networks.