samer wroteApple is strict and such a "priceless" prototype cannot leave an apple building.
They need to do field testing, that's why they usually let engineers get them out of the building.
Then they should use one of these :
In one end, they connect the iPhone prototype. In the other end, their drunk engineer.
Or simply, they can open bars inside their headquarters. Cause apparently, they'll be using this same marketing strategy for the next decade or so...