“She wakes up in the morning when her mobile phone detonates an alarm, a loud Korean pop song. She checks weather forecasts on its screen before selecting what to wear.
In the subway, Ms. Kim breezes through the turnstile after tapping the phone on a box that deducts the fare (as in photo) from a chip that contains a cash balance. While riding to school, she uses her mobile to check if a book has arrived at the library, slays aliens in a role-playing game, updates her Internet blog or watches TV.
On campus, she and other students touch their mobiles to the electronic box by the door to mark their attendance. No need for roll call — the school’s server computer logs whether they are in or how late they are for the class.
“If I leave my wallet at home, I may not notice it for the whole day,” said Ms. Kim, 21. “But if I lose my cellphone, my life will start stumbling right there in the subway.”
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