Text messages can never be sent out, indicating that they have not been delivered. How can I break them?

There are many reasons, and it is suggested that troubleshooting can be carried out according to the following conditions:

1. Confirm that the signal is normal and close the flight mode.

2. Check whether the SIM card status is normal.

3. Check whether the send key is bright and clickable.

4. If you send text messages to multiple people and manually enter numbers, please make sure to use line breaks instead of spaces to separate each number.

5. If you can receive or send SMS, it is recommended to check whether the SMS center is set incorrectly, reset the SMS center number and try again.