Hard Reset SAMSUNG G950F Galaxy S8

First method,

(1), Frist of all, turn off the smartphone by holding down the Power button,

(2), Afterwards press and hold together: Volume Up + Bixby + Power key for a couple of seconds,

(3), Release held keys as soon as you can see the Samsung logo

(4), The Installing System Update and No Command screen should pop up. Wait a few seconds until this Blue Screen disappear,

(5), Then select from Recovery, Mode menu, wipe data , factory reset,, using Volume buttons to navigate and Power button to confirm,

(6), In the next step choose "Yes -- delete all user data" to confirm the whole operation

(7), After that select option "reboot system now,

(8), Well done! The hard reset has just been DONE,