Smartphone addiction causes 
disadvantages and dangerous things. A report by Kwon, Yeop Lee and Youn Won (2013), show 
that adverse results caused by the overuse of smartphones can be easily seen in today's society. 
For example, pedestrians viewing smartphone videos when crossing the street, without checking 
the traffic signal, fumbling with one's smartphone while driving may cause car accidents; 
elementary-school-aged children are highly likely to be addicted to smartphone games.