But the text messages sent to her have never been reported ~ the received text messages show that they are temporarily unacceptable. Lahei should be able to receive the text message.

Hello, the message you sent was not successfully received by the other party. The main reason is that the other party's power off is not in the service area and the other party's mobile phone signal is full. Your mobile phone also has its own status report. There may be conflicts between them. You can close the status report and try again. If you don't receive the message receipt, you can consult the local 10086. I hope it helps you.