It is true In this world full of technology, A mobile phone is no. 10 on the necessities list for any teenager. Many students especially the year 8s and the 9s any many of them get bullied, And in this situation a phone is best as the student can type and how he feels in a memo and maybe afterwards delete because believe me or not, Not anyone likes talking to you if you are feeling depressed.
As for school, Nowadays a lot of teachers with the school focus on teamwork and communication skills of students which results in getting projects and even normal questions as group work.
Lastly I myself as teenager feels more comfortable in calling or typing than talking face- to - face when solving a conflict of even having a friendly argument because sometimes it can end up in a physical fight and trust me that is bad, Really bad