text: Some parents need to get a-hold of kids and do not feel it is the school's business about what it is their student needs to know. An appointment might have come up and there is no way for the parent to pick their kid up from school. If a student is not allowed to have their cell phone there is no way they would know this. Or vice versa, a student might need to tell a parent something that they do not feel comfortable talking to a teacher or someone in authority about.