
It doesn't matter weather you are a disciple of Leonardo or simply a fan of Dan Brown, but either ways you are going to fall for the cryptex mobile phone concept. Shaped like the cryptex, the numbers, and a few keys come as part of the rotating dials. To dial a number, answer calls or end one, you need to turn the dials towards certain directions. It's got it's own dock, where the "phonebook" is and that's where you charge the phone as well. This what the designer of the mobile, Marc Schömann says about the phone, "You turn the dial of every element to the desired cipher. If you entered the number you turn the first segment "to phone" (green LED). If you want to hang up the call you turn the first segment to "hang up" (red LED). The phone works without buttons and without a display and based on the old dial phones." Another thing… it also has a vibrating feature.
Source