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?

  • Captain Aggravated@sh.itjust.works
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    10 hours ago

    I like the side-mounted power button fingerprint reader on my S10e. It’s fast, it works, it’s in a location I can use with either hand since the phone isn’t the size of a gaming monitor.

  • Voltage@sh.itjust.works
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    19 hours 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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      17 hours 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.

    • thermal_shock@lemmy.world
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      15 hours 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.

    • davidagain@lemmy.world
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      18 hours ago

      I deduce that your phone never randomly locks while you’re using it as a satnav. Lucky you.

    • Maalus@lemmy.world
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      16 hours 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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        10 hours 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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          10 hours 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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            10 hours ago

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

    • eronth@lemmy.world
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      21 hours ago

      Yes! I’m so sad they’ve moved away from this. I could pull out my phone AND unlock it in the same grab.

    • corroded@lemmy.world
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      21 hours ago

      I can’t find a decent screen protector for my Galaxy S23, no matter how I try, and it’s all due to the damned in-display fingerprint reader. Any adhesive-style screen protector has an open area for the fingerprint reader, and it’s either a different material or a different thickness; they all look like shit. I’ve tried the screen protectors that use a UV-cured adhesive, and they’re messy, difficult to apply properly, and generally a pain in the ass.

      I’ve relegated myself to not using a screen protector at all, but considering my pocket lint scratches my screen, it sucks.

  • TheAlbatross@lemmy.blahaj.zone
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    1 day ago

    I miss when it was on the back, right around where you put your finger when you pick up the phone.

    The underscreen one is a major downgrade and I gotta fumble with it a few times to get it to work, usually.

    • RisingSwell@lemmy.dbzer0.com
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      1 day ago

      My underscreen one is excellent and works 99% of the time. That still leaves it significantly worse than rear fingerprint sensor. RIP the best unlock method.

    • Thavron@lemmy.ca
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      1 day ago

      Yessss. I had a Nexus 6P and the back fingerprint reader was amazing. Still probably the best phone I’ve had.

    • Sir_Kevin@lemmy.dbzer0.com
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      1 day ago

      This so much! And it’s eragonomic no matter which hand you use. My new phone has it on the power button and it’s just ok. I miss having a rear touch sensor.

    • MeatsOfRage@lemmy.world
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      1 day ago

      Biggest thing I miss about the old Pixels was this because you could swipe it to pull the notifications bar down. It worked system wide so you could during a game or video just pop it down to check time or settings and just flick it away without moving your hand to the top of the phone.

    • WR5@lemmy.world
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      1 day ago

      I have a Google Pixel 5 and it’s in a great location for me. It’s right where my thumb generally rests.

  • 🧟‍♂️ Cadaver@lemmy.world
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    1 day ago

    I think the answer might be ‘because of marketing’.

    For me, I dislike both the power button AND the screen fingerprint reader. The power button because I like to access my lockscreen and not to be catapulted in the last app I was using ; the screen reader because it’s messy and oftentimes doesn’t work correctly. My newborn has been able to unlock my phone, multiple times…

    What I really miss was the fingerprint reader on the back of the device. It was convenient, fast, precise and let me access the lock screen.

      • XeroxCool@lemmy.world
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        1 day ago

        I had a 3a and thought I loved the rear reader, but apparently I have my phone flat on a desk or in a stand often enough that I really do prefer the front reader

        • DontTreadOnBigfoot@lemmy.world
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          1 day ago

          I can never get my 6 to read my print unless I hold it in my hand exactly right (and even then it’s hit or miss), so the stand or desk thing is irrelevant in my case.

          • RogueBanana@lemmy.zip
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            20 hours ago

            Although the pixels specifically seems to be exceptionally bad compared to others. I absolutely hate it on my pixel 7 but my mom’s nothing phone seems to be much better but still not as fast/reliable as the dedicated sensor on the back or side.

    • Nightsoul@lemmy.world
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      20 hours ago

      Why not just tap the screen of your phone to see just the lock screen? It’s especially convenient my phone is sitting on my desk, just double tap

    • Red_October@lemmy.world
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      22 hours ago

      For my part, I don’t have all of my fingers scanned into the reader (Which is on the power button), so it’s easy to just use a different finger in the event that I want to access my lock screen specifically.

  • m-p{3}@lemmy.ca
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    1 day ago

    I had a power button fingerprint reader in the past (Moto G7 Plus) and it wasn’t great as I’m left-handed. My thumb ends up on the opposite side of the screen, so I had to use my index which isn’t ideal.

  • xmunk@sh.itjust.works
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    1 day ago

    Power buttons are often covered by cases and, since they’re usually a weak spot for water proofing, it’s more effective to have a case that fully covers the button. In-screen readers (like what I have on my Samsung A71) tend to be good enough most of the time.

    • sushibowl@feddit.nl
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      1 day ago

      It really depends on the sensor tech. The fingerprint reader in my pixel 7 pro is absolute dogshit. I’ve heard the pixel 9 line improves things though.

      • lemmyng@lemmy.ca
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        1 day ago

        Pixel 8 user here - the in-display fingerprint reader is fine, as long as my finger isn’t super dry (which happens regularly). So I’m regularly licking my finger to unlock the device like some boomer that’s used to doing it from turning pages in a book.

      • Dave@lemmy.nz
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        1 day ago

        I have a Pixel 7 Pro and have never had an issue. I don’t have a screen protector on, if that makes a difference.

          • Dave@lemmy.nz
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            1 day ago

            When I got the phone I also got one of the glass screen protectors, which was advertised as being extra thin for good touch sensitivity.

            I shattered it trying to peel the plastic backing off, and never got around to getting a new one.

            That one you linked looks like it would suit someone like me a bit better.

      • halcyoncmdr@lemmy.world
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        1 day ago

        My Pixel 6 never could read my right thumb, maybe 2% of the time. You know, the one used 99% of the time by a right handed person.

        My Pixel 9 Pro Fold with the sensor in the power button has worked 99% of the time so far with all registered fingers in all manner of grips. Almost too good honestly, since it unlocks sometimes accidentally when picking it up.

        That said, the rear sensor was still the best placement.

  • FurtiveFugitive@lemm.ee
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    1 day ago

    For a while, there was a patent on it, at least in he US. I remember having to root a Sony phone to enable the fingerprint reader on the power button about 10 years ago.

  • foggy@lemmy.world
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    1 day ago

    The S9 had the fingerprint reader centered on the back. It was awesome.

      • wreckedcarzz@lemmy.world
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        20 hours ago

        Nexus 6P / 5X all the way to Pixel 5 had it.

        While I miss the rear scanner, I have had no issues with the under-display type in the 6/7/8. I see people online every time this topic comes up, screaming that it’s awful, but… cannot reproduce, ticket closed.

  • makyo@lemmy.world
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    1 day ago

    Not an expert but I’d suppose it’s nothing more than marketing getting in the way and insisting on an over engineered solution because it’s flashy

  • SatyrSack@lemmy.one
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    1 day ago

    Wow, that is the opposite of my experience. I have only had problems with the power button fingerprint readers. My last three phones have used in-display readers, and that has been so much more reliable for me.

    I do still use my Pixel Tablet, which uses a power button fingerprint reader for some reason, and I am constantly fighting with it.

  • LordCrom@lemmy.world
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    2 hours ago

    Remember kids, don’t use fingerprint to unlock your phone. Use a passcode. Cops can force your fingerprint if they want to look through your device, but they can’t force you to reveal a password

    • tiny@midwest.social
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      1 hour ago

      Android can be configured to require a pin after a reboot which is an ok compromise if you want to invoke the fifth amendment

      • Revan343@lemmy.ca
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        1 hour ago

        Every android phone I’ve had that had a fingerprint reader required a pin/pattern on reboot by default

    • Ech@lemm.ee
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      2 hours ago

      Most phones have an emergency lockdown that will require a passcode, fwiw.