In this Tuesday, Nov. 20, 2012 photo, passengers operate their smartphones on 

In this Tuesday, Nov. 20, 2012 photo, passengers operate their smartphones on a subway in Seoul, South Korea. 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 Tuesday, Nov. 20, 2012 photo, passengers operate their smartphones on a subway in Seoul, South Korea. 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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