http://wccftech.com/samsung-disable-bixby-button-update/

For the Galaxy S8, Galaxy S8+, and Galaxy Note 8 users who do not like the physical Bixby button on the side, here is some good news for you. Samsung has finally rolled out an update that gives you an option to disable the button.

But don’t get too happy as Samsung has only given an option to disable it and not remap it to some other app like Camera or Messages. The latest update for the Galaxy S8 and Galaxy S8+ enables users to turn off the Bixby button so that it does not open the Bixby assistant.