The dramatic advancement of cellphone technology has fundamentally changed our daily lives. Smartphones and their applications have created new capital for information and communication technology corporations and changed the way people communicate. Because of an interesting awareness of the significance for digital economy and people's daily culture, many countries, from the U.S. to China, have massively invested in the smartphone industries since the early 21st century. Among them, South Korea has become one of the centers for technology development and digital culture, although the country...