Apple Company launched iPhone in Korean market in the late 2009.However,as a follower,Korea opened new era of the Smart phone.By the late 2012,the number of Smart phone users was up to 30 million,while the 4G LTE users also became more.Under the underpinning of high-speed wireless communication network,the major function of phone is not only limited to voice call,but also includes internet connection and software application that are the major reasons why users choose smart phone.Despite smarter phone brings a lot of convenience for Korean people,the negative effects have emerged. <<