How to send text messages in mobile phone flight mode? Don't tell me you can't send it or get points.

Yes, first of all, you need to download a software called "Yixin", which is an application opened by a telecom company. You won't use your money and free text messages, only your traffic. After the airplane mode is turned on, you can connect to wifi, and then turn on E-mail to send SMS. But if you don't even connect to wifi, there is really no way.