Legal Question in Real Estate Law in New York

Unfortunately private schools have the right to set codes of conduct and rules, within reason, and the phone rules, from the limited amount of information you have provided, do not seem unreasonable. You let the phone out of your control and let your friend use it, so in the end, you have some degree of responsibility for his using the phone against the school policy, and the confiscation of the phone does not seem to have been unreasonable. Sorry I cannot give you a more favorable opinion.