1. You can take pictures of unfamiliar knowledge points in class and take notes after class, which is very convenient.

2. When the teacher is in class, he will also ask us to search for some characters or deeds. Using mobile phones at this time can help us remember these things better.

However, college students should not play games, listen to music or do other things that have nothing to do with the content of the class. Mobile phone is a tool, we should use it to do something meaningful to improve ourselves, instead of wasting time using it.