How to send text messages in airplane mode?

The so-called flight mode is to turn off the GSM communication module, and the mobile phone can't receive and send RF signals, so it can't make calls and send text messages. One way is not to compile the information first, temporarily store it in the draft box, and then send it out from the draft box after getting off the plane and canceling the flight mode (only manually, not automatically). I hope this method can help you.