If you are a boy, you receive a text message from a strange phone and know what you are doing recently, will you reply or call the other person?

Most boys will reply, because he is very curious about who this person is, and may even fantasize about being a friend of the opposite sex, which may lead to an affair or a girlfriend who changes his mind. If I were a boy, I would see how I feel, how old I am and whether I have time to reply to him. If this boy is you, I think you should want to reply!