Whether you can play mobile phones in college classes involves many aspects and cannot be generalized. From the perspective of classroom discipline and attention, it is obviously inappropriate to play mobile phones in class. The classroom is an important place for learning knowledge and exchanging ideas. If all the students are playing mobile phones, the atmosphere and effect of the class will be greatly reduced. In addition, playing mobile phone is easy to distract students' attention and affect the learning effect. However, from another perspective, as a modern communication tool, mobile phones can sometimes play an active role in the classroom. For example, teachers can use the mobile APP for interactive teaching, and students can also use their mobile phones to find information to assist learning. Therefore, whether you can play mobile phones in college classes depends on the specific situation. In most cases, students are advised to stay focused in class and avoid playing with mobile phones. At the same time, teachers should also reasonably guide students to use mobile phones and play an active role in teaching.