Cryptex Phone, concept phone puzzle

Usually the work of designers is to simplify the use of devices and make them affordable for everyone, but sometimes this principle could escape to someone, as the inventor of Cryptex Phone. This is a concept of a phone-shaped tubular devoid of keyboard and screen. In its place there are rings, one for each number. To dial the phone number you'll have to rotate each ring until you see the figure you want. A system that makes us regret even the old crown with the holes of telephones once.