About one-third of parents also felt addicted to their devices.
The guidelines provide some tips for reducing exposure to radiation linked with phones—despite little evidence that radiation has any effect on human health.
People who use a phone are less attentive toward obstacles, a study shows.
Teens are more likely to turn to their friends rather than teachers if they feel unsafe online.
T-Mobile, a carrier less than half the size of Verizon and AT&T, used lower pricing, simpler service plans and an improving network to help win 8.3 million net new customers last year.
The Android phone built on face-tracking technology is due out in March; a tablet will follow in June.
Facebook team answers community questions in second global town hall.
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Facebook team, including CEO Mark Zuckerberg, addressed a slew of topics in its first global town hall.