Why can't some friends of Fetion send him short messages?

This is very simple, because the other party is set to offline and does not receive short messages, or it is the other party's, okay? You can't send short messages when you are turned off. For details, please click the question mark next to "Send SMS". If you can't send it, don't force it. If you know the other party's number, you can try sending a message 139. It's free.