Below the display you'll find Samsung's standard combination of backlit, capacitive touch buttons and a physical Home button that doubles as a fingerprint scanner. It's fast and responsive, matching the speed and reliability of the S7. There's also an iris scanner, which I scoffed at in the beginning, but found it worked with a surprising degree of reliability, unlocking the phone even in complete darkness. Setup is similar to the fingerprint scanner: create a password, PIN, or pattern first, then scan your iris. When you want to unlock your phone, simply swipe up on the lock screen and align your eyes with the animation. It's not as fast as a fingerprint scanner, but you can have both enabled at the same time, for a handy secondary way to unlock your phone.

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