In this Friday, Nov. 9, 2012 photo, smartphones collected from students are placed in a plastic basket during a class at Chilbo elementary school in Suwon, South Korea. Students agreed to hand in their smartphones when they arrive at school in the morning and get them back when they leave for home after classes. Across the entire population, South Korea’s government estimated 2.55 million people are addicted to smartphones, using the devices for 8 hours a day or more, in its first survey of smartphone addiction released earlier this year. (AP Photo/Ahn Young-joon)

Associated Press
In this Friday, Nov. 9, 2012 photo, smartphones collected from students are placed in a plastic basket during a class at Chilbo elementary school in Suwon, South Korea. Students agreed to hand in their smartphones when they arrive at school in the morning and get them back when they leave for home after classes. Across the entire population, South Korea’s government estimated 2.55 million people are addicted to smartphones, using the devices for 8 hours a day or more, in its first survey of smartphone addiction released earlier this year. (AP Photo/Ahn Young-joon)
In this Friday, Nov. 9, 2012 photo, smartphones collected from students are placed in a plastic basket during a class at Chilbo elementary school in Suwon, South Korea. Students agreed to hand in their smartphones when they arrive at school in the morning and get them back when they leave for home after classes. Across the entire population, South Korea’s government estimated 2.55 million people are addicted to smartphones, using the devices for 8 hours a day or more, in its first survey of smartphone addiction released earlier this year. (AP Photo/Ahn Young-joon)
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