Why can’t my Lenovo phone send text messages recently?

1. Verify whether the mobile phone card is shut down and whether the text message prompts that the card is full. If so, it is recommended to recharge; clear text messages. 2. Restart the phone to test. 3. Verify whether third-party communication software is installed. If so, software compatibility is not ruled out. It is recommended to uninstall the third-party SMS software and use the built-in software to try 4. Restore default SMS settings 5. Test by changing the card 6. If the problem persists, it is recommended to make a backup to prevent data loss and restore to factory settings. It does not work. Send for repair