My commentary is not going to be much, because this long article is well worth the read. This researcher and writer addresses the serious issues cell phones impose on our current generation of teenagers. Please read it here: Have Smart Phones Destroyed a Generation?
In summary, this article addresses the following phenomena of the cell phone generation:
1. Teens are getting less sleep
2. Teens are showing higher rates of depression
3. Teens are less likely to start driving at age 16
4. Teens are less likely to date, go out with friends, or have sex
5. Teens are spending less time with parents even though they are at home
6. Teens are feeling lonelier and more left out (due to social media cyberbullying and kids who are getting together posting pictures)
7. Teens spend an average of 2.5 hours a day on devices (I think it is definitely higher in some cases)
If you are wondering if your teen is addicted to cell phone use, here is another helpful article:
New Ways to Detect Cell Phone Addiction