12306 What should I do if the mobile phone core does not accept the verification code?

12306 The failure of verification code in mobile phone verification is caused by the error of mobile phone verification, and the solution is as follows:

1. First, click the icon "12306" to enter the software.

2. Then on the homepage of 12306, click "My" in the lower left corner.

3. On my 12306 page, click "Mobile phone verification". (Mine is verified)

4. On the mobile phone verification page, click "Change mobile phone number".

5. In the mobile phone verification interface, just enter the "mobile phone number" and "verification code".