How to operate the mobile phone verification of online train tickets?

The first step should be to log on to the website of 12306, and click on "My 12306 column", and the webpage will automatically pop up a prompt. Users need to send a short message "999" to 12306 to confirm the normal contact of their mobile phones. Step 2: 12306 will reply the 6-digit verification code to the passenger's mobile phone after receiving the SMS. Passengers should fill in the 6-digit verification code in the blank column of the mobile phone verification webpage within 10 minutes, and click the "Verify" button. The whole process will not exceed 5 minutes.

It should be noted that each user can get SMS verification code three times a day. Only users who have passed the mobile phone authentication can modify their email address and password in official website 12306. Passengers who have not logged on to 12306 website for mobile phone verification need to take the time to log on to 12306 website for mobile phone verification immediately.