I suddenly received a text message to change my ticket. Should I believe it?

I'm sure I can't believe it. This kind of news is generally not notified by SMS, at least by phone. If you don't believe me, you can call the airline that bought the ticket now, or download a mobile phone housekeeper, and then the mobile phone housekeeper will automatically intercept you when you receive a similar message, and then tell you whether it is a fraudulent message.