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Question Terrible finger print sensitivity with screen protector

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crankshaft

Senior Member
Jan 13, 2007
762
105
Google Pixel 6
Hi all,

Anyone having much luck with the finger print reader? Setting it up works like a charm but actually unlocking the devices 9 out of 10 times! End up having to enter the PIN instead. Just keeps saying that it's not recognised. I've tried a few fingers but really it would only be my thumbs that use it, even deleted them all and started again. I do have a Spigen screen protector on but I have that on when setting them up in the first place which like I said works OK.

Thanks
 
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Nimueh

Recognized Contributor
May 19, 2012
3,072
2,445
OnePlus 3
Samsung Galaxy Tab A series
Hi all,

Anyone having much luck with the finger print reader? Setting it up works like a charm but actually unlocking the devices 9 out of 10 times! End up having to enter the PIN instead. Just keeps saying that it's not recognised. I've tried a few fingers but really it would only be my thumbs that use it, even deleted them all and started again. I do have a Spigen screen protector on but I have that on when setting them up in the first place which like I said works OK.

Thanks
I've seen it recommended on other devices to add the same fingerprint several times (instead of fingers 1 + 2 + 3 just add the same finger/thumb for both), might be worth a try here too?
 

keithy999

Member
Mar 14, 2011
23
4
Hi all,

Anyone having much luck with the finger print reader? Setting it up works like a charm but actually unlocking the devices 9 out of 10 times! End up having to enter the PIN instead. Just keeps saying that it's not recognised. I've tried a few fingers but really it would only be my thumbs that use it, even deleted them all and started again. I do have a Spigen screen protector on but I have that on when setting them up in the first place which like I said works OK.

Thanks
I didn't find it too bad to start with. If anything better than my P30 Pro which also has an under screen sensor. Since putting a screen protector on (also Spigen glass) its become unusable at you describe :(
 

keithy999

Member
Mar 14, 2011
23
4
There's also a screen sensitivity setting to increase sensitivity when using a screen protector (can't remember where I found that) sadly it didn't improve things. I'll try the multiple same finger enrollment and let you know if that improves thinks for me
 
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crankshaft

Senior Member
Jan 13, 2007
762
105
Google Pixel 6
There's also a screen sensitivity setting to increase sensitivity when using a screen protector (can't remember where I found that) sadly it didn't improve things. I'll try the multiple same finger enrollment and let you know if that improves thinks for me
Right, I've turned that sensitivity thing on and added the same thumb 4 times (you can only add 5 fingers) and whilst it's not perfect it does seem better, probably works 3 out of 5 tries now.
 

Morgrain

Senior Member
Aug 4, 2015
542
460
I changed the thread title as I took the screen protector off and it works perfectly. Contacted Spigen so hopefully they'll come back to me
It's a known problem that screen protectors make life with an optical fingerprint scanner troublesome. There is a reason why many of us Pixel fans were stoked and happy that Google went with a decent 3D Facescan like Apple on the P4, a system that just works and one that is actually reliable. It never shut down on me, even though I had to clear the topside portion probably ~10 times in 2 years because it had trouble scanning me (because of dirt on the screen). Only "real" problem are... masks of course. Faceunlock and masks don't go well. That is why...

Imagine the Pixel 6 with face unlock AND a back-side fingerprint scanner.

That would be my dream.

It will probably remain a dream.
 
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Biggenz

Senior Member
Sep 19, 2014
410
109
I've got the same problem, but my right thumb works perfectly every time. My left thumb just refuses to unlock the phone.

Guess right thumb it is...

Edit: Actually, mine seems to have settled down and now works with both thumbs equally well.
 
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ChromeFR

Senior Member
Sep 16, 2008
84
6
Should work now, source:


Screenshot 2021-10-27 17.45.19.png
 
Mine will be coming in soon (Nov.10). I was wondering if anyone here has used the Oneplus 6T. I used to have that phone and for me the fp scanner was pretty reliable and quick enough, even with screen protectors. Only time there were issues was before rom developers had came up with better way of implementing it n custom roms, but after the new implementation it became faster than stock was on that phone. I also remember changing the color of the light had an effect on how well it read my finger. Green light was best, white was second best and the blue light was last in my usage.
 
Mine will be coming in soon (Nov.10). I was wondering if anyone here has used the Oneplus 6T. I used to have that phone and for me the fp scanner was pretty reliable and quick enough, even with screen protectors. Only time there were issues was before rom developers had came up with better way of implementing it n custom roms, but after the new implementation it became faster than stock was on that phone. I also remember changing the color of the light had an effect on how well it read my finger. Green light was best, white was second best and the blue light was last in my usage.
I have the 6T and am getting my pixel 6 tomorrow (10/28). I'm curious to see the difference. I remember those initial issues in custom rom development.
 
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  • 2
    I think I might have come across something that might help some having problems with the FPR.
    A couple days ago I ran across a article that gave some suggestions on how to correct the FPR issues. I decided to give it a try.
    First understand as I have said before I'm not using glass. I decided to go with that ArmorShield film. If you like you can check out my other post in this thread on how that was working out for me.
    So this article suggested to use some moisturizer BEFORE recording your fingerprints. So I have vaseline fast absorbing moist. Put some on my hands, and rubbed it in (so as not so mess up my screen of course). I then removed all the fingerprints I had stored and added them again. 2 of my left thumb, 1 of my right thumb and both index fingers. I went slow and basicly held my phone how I would use it and followed the on screen directions. All I can say is at least in my case WOW!!!!
    I can honestly say that now at least for my phone it works as well as any other phone I have or have had with the rear FPR.
    I also DO have the Increase touch sensitivity turned on in the display settings.
    I have to say I did not think something as simple as moisturizing my hands would make such a difference.
    I do understand as with any tech there are possibilities of bad units and I'm sure some for the Pixels will come up however I am hoping this will work for some of you guys as it did for me.
    2
    Anyone who's having problems where it doesn't read your finger at all or very rarely. Try rebooting the phone and see if it helps at all. if you notice an improvement it might be a calibration issue. Try going to https://pixelrepair.withgoogle.com on your computer using Chrome and install the fingerprint calibration software onto your device.

    Let me know if this works for anyone else.

    Im fully updated, using tempered glass screen protector with increased touch sensitivity on. I noticed that the fingerprint sensor only worked for an hour or so after rebooting before not recognizing my thumb anymore so I tried the calibration software and it seems to have helped a little. The fingerprint scanner is very slow but if I hold my finger there long enough it will unlock on first or second try.
    READ this first.

    1
    This is actually a security hazard. You might want to do a bit of research on this. There are several people who tried out with their partners and those were able to unlock their phones. If you register your fingerprint with a screen protector on, chances are that the optical scanner just registers what's underneath your screen protector, ergo giving out the "go" for unlock, even though your fingerprint is not correctly registered, ergo even your partner by chance could unlock your phone, without ever having set it up.

    Always register an optical fingerprint scanner without a screen protector.
    are you sure this is true for an optical FP scanner. I see your point with an ultrasonic FP scanner, but the optical uses an image of your FP. Yes, the optical FP scanner can be fooled by a high res image of your FP, but that is an inherent problem with them, with or without a screen protector.
    cheers
    1
    for what it's worth, i got these in matte and hd clear and they are both excellent products.


    fingerprint works without issue.
  • 3
    I changed the thread title as I took the screen protector off and it works perfectly. Contacted Spigen so hopefully they'll come back to me
    2
    I think I might have come across something that might help some having problems with the FPR.
    A couple days ago I ran across a article that gave some suggestions on how to correct the FPR issues. I decided to give it a try.
    First understand as I have said before I'm not using glass. I decided to go with that ArmorShield film. If you like you can check out my other post in this thread on how that was working out for me.
    So this article suggested to use some moisturizer BEFORE recording your fingerprints. So I have vaseline fast absorbing moist. Put some on my hands, and rubbed it in (so as not so mess up my screen of course). I then removed all the fingerprints I had stored and added them again. 2 of my left thumb, 1 of my right thumb and both index fingers. I went slow and basicly held my phone how I would use it and followed the on screen directions. All I can say is at least in my case WOW!!!!
    I can honestly say that now at least for my phone it works as well as any other phone I have or have had with the rear FPR.
    I also DO have the Increase touch sensitivity turned on in the display settings.
    I have to say I did not think something as simple as moisturizing my hands would make such a difference.
    I do understand as with any tech there are possibilities of bad units and I'm sure some for the Pixels will come up however I am hoping this will work for some of you guys as it did for me.
    2
    Should work now, source:


    Screenshot 2021-10-27 17.45.19.png
    2
    Anyone who's having problems where it doesn't read your finger at all or very rarely. Try rebooting the phone and see if it helps at all. if you notice an improvement it might be a calibration issue. Try going to https://pixelrepair.withgoogle.com on your computer using Chrome and install the fingerprint calibration software onto your device.

    Let me know if this works for anyone else.

    Im fully updated, using tempered glass screen protector with increased touch sensitivity on. I noticed that the fingerprint sensor only worked for an hour or so after rebooting before not recognizing my thumb anymore so I tried the calibration software and it seems to have helped a little. The fingerprint scanner is very slow but if I hold my finger there long enough it will unlock on first or second try.
    READ this first.

    2
    With or without glass screenprotector @Biggenz?
    With the screen protector on.