Mobile phone authentication 12306. I can't send a message at 999 to 12306. What happened?

The processing method that the mobile phone cannot send short messages is as follows:

1, you can change your mobile phone to see if you can send and receive short messages;

2. If you can send and receive short messages, I suggest you plug the card back into your mobile phone and send yourself a short message to see if you can receive it.

3. If not, I suggest you check whether there is a problem with the sim card;

4. Check whether the number of the SMS center is set correctly;

5. Bring the mobile phone card to the local business hall for testing or replacement.

Extended data

The mobile phone verification method is as follows:

1. Open the website of 12306, enter your user name, password and verification code on the right side of the website, and click "Login now".

2. After successfully logging in to 12306, find "My 12306" at the top right of the page and click.

3. Then in the left column of "My 12306", find "Mobile phone verification", as shown in the figure.

4. After clicking, a dialog window for two-way verification of mobile phone will pop up. After obtaining the verification code, fill in and click the "Verify" button.

5. After that, a prompt "You have completed the two-way verification of the mobile phone" will pop up on the page, as shown in the figure. Click "Confirm".