How to solve the problem of non-delivery of SMS displayed on Apple's mobile phone?

1. After entering the specific option list of mobile phone system settings, find the general settings and open it.

2. Find the recovery settings at the bottom of the general menu bar for the next step.

3. After entering the specific settings page of recovery, click Restore Network Settings to enter the next step. (This function only initializes the network settings of the mobile phone, and will not affect other data information of the mobile phone. )

4. Before restoring the network settings, verify your identity according to the system requirements and manually enter your own 6-digit password.

5. After restoring the network settings, press and hold the power button on the right side of the iPhone to restart the phone.

6. After restoring the network settings and restarting the mobile phone to make it take effect, unlock the mobile phone and turn on the SMS function.

7. After entering the main page of SMS program, click the red exclamation mark on the right side of the undelivered message.

8. A menu bar will pop up at the bottom of the phone screen, and you can choose to try sending the message again.

9. After the network settings are restored, iPhone can successfully send previously undelivered information by resending.