I had two Samsung flagship phones, one (S20FE) had an optical fingerprint reader and the other (S22) had an ultrasonic one. Both of them somewhat regularly failed to read my finger, were slower than a fingerprint reader on the power button and are more expensive/complex to build. They won’t work with cheap 3rd party screen replacements and some screen protectors as well.

Meanwhile my $90 Android phone has a fingerprint reader on the power button. It never fails and I never have to perfectly place my finger on the sensor area to get it to work. It just seems like the perfect place to put a fingerprint sensor, so why do phone manufacturers keep using in-display fingerprint readers over the cheaper alternative?

  • Voltage@sh.itjust.works
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    2 months ago

    Optimal fingerprint reader placement is on the back of the phone. You can just pick it up slide your finger on it and boom on to the home screen. Just want to see the time? Just press the power button and see the lockscreen.

    • SolOrion@sh.itjust.works
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      2 months ago

      Agreed completely. I have an S23 rn, but my previous phone was a mid-tier android with a fingerprint reader on the back. My natural resting grip on my phone would just unlock the thing. It was amazing. My current phone is a clear upgrade in every way except the fingerprint reader. My new one has it in the screen and I fuckin hate it.

    • Maalus@lemmy.world
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      2 months ago

      My under the screen fingerprint sensor allows me to take out my phone from my pocket already unlocked. No button presses, no fiddling with finger placement on the back, it just works and is fastest.

      • ikidd@lemmy.world
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        2 months ago

        IDK how you manage that since there’s no tactile feedback to know when your finger is in the right spot on the screen. I have to be very precise with mine so I have to look at it every time.

        • Maalus@lemmy.world
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          2 months ago

          I don’t. I just pull it out of my pocket roughly in the middle by pinching with my pointing finger and thumb. Get an unlocked phone each time I get it out.

          • ikidd@lemmy.world
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            2 months ago

            Must be a much better reader than on my Pixel6. Not very fucking impressed with that one.

    • thermal_shock@lemmy.world
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      2 months ago

      I’m mixed on this. I have had the S9 for 6ish years, since launch. I love that it’s on the back. except having to pick it up to unlock it lol. so 80% of the time it’s amazing, which I guess is good enough.

      also, pro tip, add multiple finger prints, both thumbs, and index, etc. so you can unlock it in multiple grips and don’t need a single finger available to get in.