My personal experience as a university student who had to use a flip phone for like a month while waiting for a replacement screen to arrive for the main phone, which is quite similar to what would have probably happened 10 years ago when I was still in school.

Everyone kinda expects you to just have one, for example, nobody uses the actual calling or SMS functions, they use chat apps like Messenger, WhatsApp, Line, or discord. Most of the people that I talk to in the university, I wouldn't even be able to contact without the apps, since I don't actually know their phone numbers or e-mails