A new report shows having a phone is making teens unhappy.
The study has been commissioned as an addition to the UN's 2019 World Happiness Report.
The report studied children in the US aged 13 - 16. It revealed that despite improvements in the standard of living, teenagers happiness has gone down as digital media use increases.
It showed sleeping, sports, social interaction and volunteer work brought the most happiness to teens.
Listening to music on phones, going online on phones brought unhappiness. As well as on phone gaming and social media.
The study found that teens are spending less time meeting friends, socialising and going to parties while increasing their time online.
By last year 90% of teens had access to smartphones.
Half revealed they are online constantly.
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