When my mobile phone is turned off, how can I receive the message?

In today's society, "nothing can be done without electricity" is a truth, and mobile phones are no exception. The only way is to send him a short message, and at the same time open the function of receiving and replying short messages here. When he turns on his mobile phone, he will receive your message immediately, and you will also receive a message notification that he has received the message. This is the way I take when I meet your problem. I don't think there is any other way, I hope I can help you!