How does Fetion send messages anonymously?

Hello, for Fetion friends, you can set an undisclosed mobile phone number for your friends. Select a friend's avatar in the computer client, right-click and uncheck the option of revealing mobile phone number to the other party. In this way, when you send a free SMS, 12520+ your flight signal will be displayed. If non-friends belong to paid SMS, they cannot be set, and the mobile phone number will be displayed.

Please refer to, thank you.