1. rcpa's Avatar
    I've had three different occasions so far where the fingerprint sensor just stopped working. And it's not that it stops recognizing my fingerprint, but rather that it stops doing anything. Normally, if you touch it and it fails to recognize your figerprint, it give two quick vibrations. But occasionally, it stops responding at all. You touch it and nothing happens. They only way I've gotten it to work again was to reboot the phone.

    One of the times it happened, it failed to recognize my fingerprint about 6 times in a row, and then just stopped responding at all. A few minutes ago, I picked up my phone and it just didn't respond to my touch.

    Now that I think about it, when I turned on the screen with double-tap, it popped up the passcode keypad, which it shouldn't have done because my watch is set up as a trusted device. But even after entering the passcode and then turning off the screen, it wouldn't respond to my touch on the fingerprint sensor.

    I've also had some times when the smart lock with my trusted devices and trusted location stopped working. Maybe these are related.

    (I've also had issues with smart lock not working with my G3 too)
    u2nyr likes this.
    04-13-2016 07:23 AM
  2. Dubss's Avatar
    Im not sure if I've experienced that

    Posted via the Android Central App
    04-14-2016 12:32 PM
  3. Hugo's Avatar
    I've had three different occasions so far where the fingerprint sensor just stopped working.
    < . . . >
    (I've also had issues with smart lock not working with my G3 too)
    That's weird. My experience is that the fingerprint sensor is fast and works every time.

    Seeing as you've also had issues with your G3, you may need to play detective and start by closely looking at your settings and apps. Good luck!
    04-14-2016 04:43 PM
  4. sublimegolf's Avatar
    I'm having issues with the fingerprint sensor too. But for me it might be due to using Nova Launcher. If i turn off the phone with the power button, I can wake it with the fingerprint sensor. But if I turn it off with double tap, I can't use the fingerprint sensor to turn it on. Anyone else have this problem?
    04-15-2016 12:14 AM
  5. orbital247's Avatar
    Hi all,

    I had this problem too and it took me a while to figure it out, i use action launcher and set it to lock the screen with a triple tap (which i thought would just turn the screen off and allow we to unlock with the fingerprint sensor). The issue for me was that this function by the launcher literally locks the phone rather than just turning off the screen and the fingerprint sensor basically doesn't respond (as it can only be unlocked with a pin or whatever you have set).

    There is no screen based option that I've found other than a double tap on the notification bar (drag it down and then double tap in the empty space to the right of the time/date) that turn the screen off and allow you to unlock with the fingerprint sensor.

    Hope this makes sense ?
    04-15-2016 03:55 AM
  6. jrham's Avatar
    If the scanner fails to recognize your print to many times then it locks you out of the ability to use it until you unlock it with you backup method. When you're locked out of the scanner it will not vibrate but if you look at the bottom of the lock screen it will tell you unable to use fingerprint use ( insert method).
    04-18-2016 05:54 PM
  7. zephyr81's Avatar
    Hi all,

    I had this problem too and it took me a while to figure it out, i use action launcher and set it to lock the screen with a triple tap (which i thought would just turn the screen off and allow we to unlock with the fingerprint sensor). The issue for me was that this function by the launcher literally locks the phone rather than just turning off the screen and the fingerprint sensor basically doesn't respond (as it can only be unlocked with a pin or whatever you have set).

    There is no screen based option that I've found other than a double tap on the notification bar (drag it down and then double tap in the empty space to the right of the time/date) that turn the screen off and allow you to unlock with the fingerprint sensor.

    Hope this makes sense ?
    Orbital is correct. This is the same with any 3rd-party launcher. In order to unlock your phone with the fingerprint scanner, the phone must have been locked by one of the following methods:

    • Double-tap on empty area of stock LG home screen
    • Double-tap on notification bar
    • Press the power button


    Using any 3rd party launcher's method of locking the phone will NOT allow you to unlock with the fingerprint scanner.
    04-20-2016 08:45 AM
  8. jrham's Avatar
    That wasn't an issue for me using the Google Now launcher.
    04-21-2016 08:17 AM
  9. eggdashure's Avatar
    I'm having this issue as well. The fingerprint sensor from powered off screen will unlock and power on the screen fine for a few hours, then it just stops working. I checked in Settings - > Fingerprint and Security and the sensor will recognize my fingerprints fine there. Power off the screen, no response to fingerprint unlock. Very strange.

    I too use Bluetooth Smart lock for a small headset I use. I also use Apex Launcher for my 3rd party launcher.
    04-27-2016 06:57 PM
  10. rhmzanz's Avatar
    Are you using protection screen on your LG device ?? it fits to all of your front panel ?
    07-14-2016 07:34 AM
  11. keygeeks's Avatar
    yes i have the same problem with nova launcher
    08-10-2016 12:27 AM
  12. EmilyXD's Avatar
    Thats happened to me too. The finger sensor not working. i freaked out for a bit but it just needed to be cleaned.
    08-11-2016 12:44 PM
  13. tabberkev's Avatar
    One thing I've noticed, is that if the proximity sensor thinks its against your ear, it turns the fingerprint sensor off. The only time i've had the fingerprint sensor fail to respond at all, I realised the always on screen was actually off, because my other hand was quite near the proximity sensor and the room was very dark. Other than that, works perfectly, very fast fingerprint detect. I actually ended up redoing my fingerprints, and if you move you finger around (As it actually tells you on the screen, which I didn't read properly first time), it is even better at unlocking first time.
    08-15-2016 04:39 AM
  14. Hvacmanjc's Avatar
    http://phandroid.com/2016/08/17/lg-g5-issues-problems/
    Common issue with the G5. Looks like LG has a quick turnaround time for repairing/swapping out. It's a known issue on all carriers G5's.
    08-18-2016 10:19 PM
  15. Afrillia Pink's Avatar
    I've had three different occasions so far where the fingerprint sensor just stopped working. And it's not that it stops recognizing my fingerprint, but rather that it stops doing anything. Normally, if you touch it and it fails to recognize your figerprint, it give two quick vibrations. But occasionally, it stops responding at all. You touch it and nothing happens. They only way I've gotten it to work again was to reboot the phone.

    One of the times it happened, it failed to recognize my fingerprint about 6 times in a row, and then just stopped responding at all. A few minutes ago, I picked up my phone and it just didn't respond to my touch.

    Now that I think about it, when I turned on the screen with double-tap, it popped up the passcode keypad, which it shouldn't have done because my watch is set up as a trusted device. But even after entering the passcode and then turning off the screen, it wouldn't respond to my touch on the fingerprint sensor.

    I've also had some times when the smart lock with my trusted devices and trusted location stopped working. Maybe these are related.

    (I've also had issues with smart lock not working with my G3 too)
    I've same problem with u, my g5 when first i use it is very easy and fast respon to my fingerprint but now after 4month, oneday it stop reading or respon my fingerprint
    Like u said, usually vibration always follow after reject ur fingerprint but now its nothing happen if i touch.
    Anyone can help?
    Please..>_<
    10-03-2016 10:15 PM
  16. Kayden Lord's Avatar
    My Galaxy s7 edge was experiencing the same exact problem, all I did was turn off Bluetooth and everything was back to normal
    01-28-2017 02:12 PM
  17. Timscn123's Avatar
    I have the same problem but i think its my hadware thats broken.
    08-23-2017 11:35 AM
  18. nsp24's Avatar
    my sensor has just packed in for the second time! and the phones not a year old yet!
    08-27-2017 03:31 AM
  19. spmlsu's Avatar
    Same here....just started happening. Appears to be a hardware issue. I cannot register a new finger on the fingerprint settings. It doesn't recognize that anything is touching the sensor at all.
    08-29-2017 10:59 AM
  20. Jasmine Ayala's Avatar
    I just recently noticed a similar problem with my lg stylo 2. I had shut off the password for about 20 minutes and when I went to go out my password back and put my fingerprint back now it just says "enrollment was not completed. Try again or use a different finger" without giving me a chance to try to scan my finger. Can anyone help??
    09-20-2017 06:50 AM
  21. JohnOKe's Avatar
    LG G4 happens more and more often. A restart of the phone fixes it. Is there a soft reset available? Seems obvious this is a software issue, not hardware, since restarts make it work again.
    03-28-2018 09:38 AM
  22. kallias's Avatar
    rcpa. For me it was a problem with SIM PIN codes!

    I have a dual SIM G6 H870DS. I also noticed that sometimes the fingerprint unlock wasn't available although the sensor was correctly recognising my fingers during the setup process so it wasn't the sensor. I dont usually have both SIMs active at the same time. I have a SIM lock code enabled on SIM2 but not on SIM1. I eventually discovered that if that SIM2 has had a wrong pin code entered and I have used up any of my 3 attempts before needing the PUK code then fingerprint unlock is unavailable.

    Obviously The SIM PIN count is not automatically reset with reboot so I spend ages and ages mucking about until a "what if" moment made me unlock the second SIM. Fingerprint unlock was instantly available again. Problem solved.

    So I can have the SIM enabled or with all 3 unlock attempts left but not with just one or two attempts left. I don't really see why the fingerprint unlock and SIM lock should be tied together like that but at least on my dual SIM they are. I'm on Oreo now but I believe this is what was causing me occasional problems on Nougat too.
    06-10-2018 05:56 AM
  23. Linmawi's Avatar
    My huawei p8 lite doesn't recognize my fingerprint, and whenever I try to set another fingerprint up it doesn't work
    07-01-2018 02:12 AM
  24. Kennedy Kiburi's Avatar
    My phone's fingerprint scanner abruptly stopped working and its not responding at all not even the haptic feedback. Anyone with any ideas what i can do, i have tried deleting apps as i had seen on other forums and rebooting but nothing works. I cannot even reset the fingerprint once i go to the fingerprint settings it doesn't allow me to reset or delete the fingerprints its unresponsive.
    08-08-2018 02:52 PM
  25. Rippler's Avatar
    I'm having the same problem lately with my LG G5, where the fingerprint scanner just seems to completely quit functioning. I tried to scan another fingerprint into it, and it wasn't picking up anything at all, it just seems to shut down. Restarting the phone usually gets it working again, but sometimes not for long.

    I'm also using Nova Launcher, however I've been using it for the last 2.5 years on this phone without any issues. It's just the last month or so that the scanner seems to stop functioning. So I really don't think Nova can be blamed at all. I'm thinking it's more of a hardware issue going bad.
    09-15-2018 03:35 PM

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