I accidentally deleted the message before I could read it. Who knows how I can know the content of deleted messages?

I can't help it This is personal privacy. You can't see it in the business hall. There are two ways. It depends. First, if you can't get his mobile phone, you can only ask him to resend it. There is a trick. Usually after sending a normal short message, it will stay in the system for one day. If you turn it on on this day, you will receive it. You can't get it if you don't turn it on. You can tell him that you haven't turned on your phone all day. Ask him to resend it.