Phones for life

Recently a rule in our school have been enforced. The rule itself is that we are not allowed to use our phones in the hallway or in the building. To me, I think this rule is unfair. Honestly I'm okay with not having them in class because people do stupid things with their phones. I understand that rule but what is the true harm of using it in the hallways. The most we can do with using our phones in the hallway is reply to a few text messages or study for a test we forgot to study for the night before. Also I don't see why you would punish everyone for what a few people are doing. To me it doesn't make sense but I don't have a say. I do believe that with time maybe they'll ease up but until then we have to deal with the rule.