How can Apple 13 check the success of mass sending?

Take the iPhone as an example. Open it.

Look at your system time. This happens if the system time is wrong. For example, today is June 1, and your system time is September 1. Then you can only see the messages sent by others, and your mobile phone doesn't display the messages you sent. Because.

Press and hold the message content and swipe right. If there is time, it means it has been sent.

There are signs that two of them have not been sent successfully, but they just can't be found there.

If the message is not sent successfully, there will be a red circle on the left side of the message. If you can't view it directly, slide down and look at the SMS record.