12306 how to verify the mobile phone? What if there is no verification code?

Under normal circumstances, as long as the passenger sends 999 to 12306, it will take about 5 seconds to reply to the passenger to send the verification code. "When the passengers of mobile phone authentication are centralized, there may be network delay, which makes it impossible to reply the verification code quickly." If the SMS cannot be verified normally after being sent n times, you can directly call the customer service phone number 12306 to inform the customer service staff of the mobile phone number, and the customer service staff will inform the verification code to help passengers complete the mobile phone verification. First, the user logs on the website of 12306 and clicks on the personal information column under "My 12306" in the upper right corner of the page to verify the mobile phone. Send SMS "999" to 12306 using the mobile phone number reserved at the time of registration. Passengers can fill in the 6-digit verification code in the blank box of the mobile phone verification webpage within 10 minutes according to the received 6-digit verification code, and click the "Verify" button to complete the verification of identity information and mobile phone information. In addition to the website, the mobile phone client of Railway 12306 has also started the mobile phone verification service. Although it can be verified at any time, the customer service staff of 12306 still advises passengers to verify their mobile phones as soon as possible to avoid delaying the purchase of tickets during peak hours.