How to prevent SMS fraud such as ticket change when traveling abroad on National Day? What should I do?

First of all, air tickets should be purchased through formal channels to prevent personal information from leaking. Secondly, you need to install Tencent Mobile Manager on your mobile phone, which can intercept fraudulent short messages and mark fraudulent numbers to ensure that users are not fooled as much as possible. Finally, if you are really not sure whether the received SMS is fraudulent, don't reply blindly. Ask the airline first, and then reply after confirmation.