What is the distress message?

That is to say, the mobile phone has a special function, and several contact numbers are set. When you need help in any emergency, you can press the shortcut key to send the specified content to the set number.

Samsung D908 used before has this function, and the shortcut key is to press the side key. Now it is estimated that many cottage phones or elderly phones have this function. If you receive it, people around you may have nothing to try.