Wearable mobile communication devices bring a new experience in communication.

A new wearable mobile device that conforms to 3.5G and 4G communication standards, making it easier to operate in a mobile environment and lighter in weight. The human hand is the most basic medium of communication. For ease of operation, the finger joints are used for control, which is very intuitive. Each finger joint, except for the thumb, can be used as a key, for a total of 12 keys. Using the finger joints as keys, in conjunction with a 3x4 mobile phone keypad, will become the most popular input method.