yeah its much needed

go to setting reach for reset there and there you go click reset.

sound is awesome after one UI upgrade on S8 you'll get dolby atmos mode for earphone sound

Update is all good lots of new feature Always on display got some new dials night mode is cool whole UI got a new look based on android P so i would say it is good.you may experience little bit of slowness after upgrade after after a while it runs sm...