1. Check whether your mobile phone is in airplane mode. After the airplane mode is turned on, the mobile phone can't send any information.
2. Check whether the mobile phone number you are using is overdue for downtime. At this time, 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 user, order, ticket amount and other information with the official website of train tickets, and uses unified ticketing business rules. The software has the functions of air ticket reservation, online payment, change, refund, order inquiry, common contact management, personal data modification, password modification and so on. It was officially put into trial operation on February 8, 20 13. Railway 12306 not only provides ticket purchase and ticket inquiry functions, 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 Corporation, and directly reached the official new media channels of "China Railway" people, Xinhua, Sina and Tencent, Weibo and National Railway Administration 18.