Smartphones help teenagers to communicate with their friends outside schoolyard. They can share important moments and keep up to date using social networks such as Facebook, Instagram, twitter and many more. These social networks can help them be more social to the people around and have no problems dealing with people.
Another important aspect is educational. Smartphones mainly help teenagers to exchange their ideas and information among each other. It units them to solve problems, focus and understand more by helping each other as shyness to ask is rarely found between friends. For example, teenagers can create a group in any of the social media to share files related to their studies or ask each other questions in order to clarify something that is linked to what they are studying.
Finally yet importantly, teenagers are exposed to crimes as raping, kidnapping or murdering is spreading, teenagers can contact their parents in case any problem is occurring at that time for faster reaction from the parents.
In a nutshell, smartphones are one of the most important features that is going to benefit teenagers specially nowadays as its their time to shine with technology.