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Not exactly. For starters, these sensors are not flawless. Old capacitive scanners hardly recognize wet fingerprints, and in any case they often do not work at the first attempt. So if your hands are sweaty in summer or during workouts, your smartphone may dig its heels in and not recognize you. Scars, scratches and other skin flaws also decrease the recognition quality. Moreover, many sensors cannot distinguish a real finger from a cast — and this is a really big hole in security.