With OneUI and Android Pie, Samsung – like Google and OnePlus – is offering a navigation system option to replace the traditional nav bar if you choose. Unlike Google and OnePlus, Samsung's version keeps the Recents "button" alongside Home and Back, and even has two modes to help you ease your bar-less experience. Everything lives in one simple menu
Samsung phones with OneUI
How to adjust your navigation settings in Samsung OneUI  Open the Settings app (gear icon)
Scroll down and tap Navigation bar
Scroll down and tap the Button order you prefer. Samsung traditionally has the nav bar set to [Recents, Home, Back] as opposed to the more normal [Back, Home, Recents] used by most manufacturers
By default when you swap to full-screen gestures, you'll still see three slim lines at the bottom of the bar, which help train your fingers as to where each of the nav gestures is at the bottom of the screen. You are always comfortable with the gestures, scroll to the bottom of the navigation bar menu and tap Gesture hints to remove the three lines and give yourself a full-screen experience.
Deep discounts make this flagship even more affordable while still letting you try out Samsung's new Android 9 Pie and One UI software. While this model is almost year-old, it is by no means outdated.
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