Hi, I'm rather new here. I've got a question that's bothering me, and therefore decided to ask here. Why is it that in a lift/elevator, radio signal usually gets weakened? And, as far as i know, FM radio operates on the radio wave band, as well as cell phones. But why is it that mobile phones generally have acceptable reception in lifts/elevator whereas FM radio reception remains poor? Don't they operate at the same wavelength/freq? Has this something to do with the energy level stated by E=hf, or something?