Hi, thank you for your comment !
There is a problem with the enigma in elevator, unfortunately too much people get stuck there.. As it is for a jam, I couldn't test it really, and I guess my logic is not same as anyone else. Only few people could get it alone, and other ones I had to help. I guess a few hints from the voice could have helped you.
The idea of this enigma is that you really have to type the code that the buttons are showing (3096), but when you type 0, it is like typing2, when you type 1, it is like typing 3, when you type 2, it is like typing 4,... eevry number + 2.
So when you type 3096, you in fact type 5218 (+ 2 for every digit and if more than 10, we just keep last digit).
So you need to press -2 for every digit. So globally, the answer is 1874.
It's near the end of the story, you can also quite cut all the story at beginning with just pressing the code even if the voice didn't do the thing on screen. (you will just have different dialogs later if you don't do some at beginning^^)