Teens who are glued to their smartphones and other devices are unhappier than those who spend less time on digital media, finds a new study of over a million teens. The happiest teens spent a little less than an hour a day scanning their smartphones, tablets or other devices.

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Teens who are glued to their smartphones and other devices are unhappier than those who spend less time on digital media, finds a new study of over a million teens. The happiest teens spent a little less than an hour a day scanning their smartphones, tablets or other devices.