Why do you receive both SMS and Fetion?

This situation has nothing to do with your mobile phone settings, and it is probably caused by a friend's misoperation.

In the new version of Fetion, there are two ways: information and short message. Information is messages and short messages, and it is a key switch.

It is very likely that your friend didn't notice that his message interface was "SMS" when your Fetion client was online, which caused your client to receive Fetion SMS at the same time.