Because in college, not many people actually care about you. If you want to learn, you have to learn You don't want to learn. Nobody asked you to learn. So many teachers in the university don't really care about playing mobile phones in class, so this is a class, and teachers don't care about playing mobile phones. In college, in fact, many students played mobile phones, and the teacher didn't care, because the teacher thought it was nothing to play mobile phones, and he was only responsible for teaching him that. If you play mobile phone, then play mobile phone, because if you play mobile phone, you will probably get low marks at the end of the term, and someone may even ask you to play with you. In college, you just want to learn by yourself, so no one will care about you, so in college. For example, when I took the postgraduate entrance examination, I had good self-control. I got up at 7 o'clock every day and began to study at night 10. I think the self-control in college is very fast. If you don't have good self-control in college, it is basically impossible for you to study hard, because there are too many temptations, and most people in college are actually playing mobile phones, so many people are playing in class.

Playing mobile phone in class is actually nothing, because he always gives you subjects according to your final grade. If you don't do well in the final exam, the teacher will probably let you take it because of your poor performance, but if you don't pass the exam, you will have to retake it, so it's your own fault that you don't study hard in college, so most people don't choose to play mobile phones in class, but choose to have fun.