Sending SMS to 12306 failed.

1. Check whether your phone is turned on in airplane mode. After the airplane mode is turned on, the mobile phone cannot send any information.

2. Check whether the mobile phone number you use is down due to arrears. At this point, you can call the service phone number of the corresponding operator for inquiry.

Railway 12306 is the official mobile phone ticketing application software launched by China Railway Customer Service Center. It shares information such as users, orders and ticket amounts with the official website of train ticketing, and uses unified ticketing business rules. The software has the functions of air ticket reservation, online payment, ticket change, refund, order inquiry, common contact management, personal data modification and password modification. It was officially put into trial operation on February 8, 20 13. Railway 12306 not only provides the functions of ticket purchase and ticket inquiry, but also adds three menu functions of railway information, self-service and platform alliance. "Railway Information" issues timely and authoritative news and passenger and freight transport notices; "Self-service" provides the public with the most commonly used passenger self-service inquiry service; The platform alliance has opened the entrance of other new media service channels of the railway head office, and directly reached the "China Railway" people, four official Weibo, Xinhua, Sina and Tencent, and the official new media channels of the national railway bureaus 18.