go to the discover tab in samsung members app >> tap the bell icon in the top right corner >> tap notices >> and tap the one ui 4 update list and its best features
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It's basically the security and privacy related updates which are most important.Like getting notified when camera or mic is used by any app. And yes the customisation. You can get a better idea from YT. 🙂 https://youtu.be/1n_EmgewnCg
