Why did you deliver the message later?

The short message has been sent later, indicating that the notification short message has been sent to the recipient's mobile phone. The short message sent by the mobile phone shows that it has been delivered, indicating that the receiver has successfully received it. Generally, there is a service reporting function in the SMS settings. When this function is turned on, the receiver will return a service report when receiving the short message. When the sender receives this report, it means that the receiver has successfully received it.