Similar cases like this are popping up all over the country. I did some research awhile ago and found a case in Pennsylvania, Klump vs. Nazareth, and the courts actually found the school guilty of violating the students' privacy and constitutional rights by looking at the contents of their phone. This case basically stated that although the school can have a no cell phone use policy, it does not give the school or school officials the privilege to search the contents of the phone at will unless it is believed that the student is using the phone to violate another policy (IE: using the phone to cheat). The point is, in order for any school official to search cell phone contents, the student would have to be violating another policy other than the no cell phone use policy. Being that this case is also in PA, it could be used as case law and charges would most likely be thrown out.