I sent a text message just to show that it was being sent, but I couldn't send it. I can receive messages, and the number of the SMS service center is correct, but I can't send letters.

I suggest that you can judge the situation according to the following methods, which will help you solve the problem:

1. Please confirm whether the mobile phone is in arrears;

2. Whether all the short messages can't be sent out, if you can't send short messages to a few contacts, you are likely to be blacklisted;

3. Try to send a short message to your mobile phone number with your mobile phone number to see if it is successful;

4. I suggest you check whether the SMS center number is set correctly. Please contact the operator to check the SMS center number.

You can call up the hidden menu by clicking the menu key at the lower left of the main menu-SMS, and check whether the number of SMS center is correct in Settings-SMS Service Center.

5. If the short message still cannot be sent, you can click the menu key in "Main Menu"-"Info" to bring up the hidden menu, and click the menu key in the "Settings" page to bring up the hidden menu, and then restore the default settings;

6. Have you tried to change other SIM cards, and can you send short messages normally? Do not rule out that it is caused by your own SIM card abnormality;

7. If there is still no improvement, it is recommended to back up the important data of the lower part of the fuselage and try to restore the factory settings.

8. After trying the above operation, there is still no improvement. It is recommended that you send your mobile phone to a local maintenance point for testing and debugging as soon as possible, so as not to affect your subsequent use. On-site solutions will be provided according to the specific situation of mobile phones.

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