雅思口语P2 Describe a rule that you don't like(文字版)

The rule that I don't like is definitely about my smartphone. What I am trying to say is that it is normally not allowed to use a smart phone in the class, even sometimes we have to give the phone to teachers, it does not make sense in my mind. Actually, from Monday to Friday when we are very busy with our everyday study, we cannot use the phone at all. All day long, the moment we sit in the classroom, the rule works for us, you know. But ironically, school teachers do not have to follow this sort of rule at all, which in my consideration, it not fair enough. You know, I think everyone at school should be equal for real. Besides, when we meet some problems of life or difficulties of homework, the smart phone could be a good helper, because it has the Internet, all the things can be worked out according to it. So, I think that this is a bad rule that I hate the most and the school should be encouraged to make the change on this point. That is it.