Are you talking about a friend leaving their phone in your room for a few minutes as a prank, or actual serious surveillance by an organisation? With the latte

Are you talking about a friend leaving their phone in your room for a few minutes as a prank, or actual serious surveillance by an organisation? With the latter, believing that can be a symptom of paranoid Schizophrenia. And as a person who's dealt with mental illness myself, it's way better acknowledging and dealing with it as soon as you can.