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MIUI 12 Fingerprint Unlock defective

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Huaw3iNova3i

New member
Jul 24, 2019
1
1
I solved it. Here's my case. (MI 9T PRO FOD failed).
-Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

#Issue: What, Why & How.
FYI: I bought in online [OLED+bio support] The quality is good its OEM.

#CSI
-read about MIUI v11, v12 related issue fod
-i noted the vendor update script/locksettingdb, persist.img..etc from few forum
-the water leak issue also made me think cause the fod failed
-some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

#GO DEEP
-current MIUI 12.0.3
-i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
-i dloaded app & test touch point. Its only support 5 finger touch not 10.
-update to MIUI 12.0.6 - can read & save but still fod failed

#Longstoryshort
-I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent
 
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Reactions: manxour

Akash099

New member
Sep 25, 2021
3
0
I solved it. Here's my case. (MI 9T PRO FOD failed).
-Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

#Issue: What, Why & How.
FYI: I bought in online [OLED+bio support] The quality is good its OEM.

#CSI
-read about MIUI v11, v12 related issue fod
-i noted the vendor update script/locksettingdb, persist.img..etc from few forum
-the water leak issue also made me think cause the fod failed
-some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

#GO DEEP
-current MIUI 12.0.3
-i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
-i dloaded app & test touch point. Its only support 5 finger touch not 10.
-update to MIUI 12.0.6 - can read & save but still fod failed

#Longstoryshort
-I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent
Bro I inbox to your insta now. It's urgent.
 

YamazakiRobert

Senior Member
Dec 24, 2007
337
49
i have replaced my screen with a screen with 5 points
some times i have a reboot
and i cant boot any custom rom

if i remove the fp i will be able to boot custom roms?

thanks in advance
 
Last edited:

Grandmaster_hag

New member
Nov 19, 2020
2
0
I solved it. Here's my case. (MI 9T PRO FOD failed).
-Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

#Issue: What, Why & How.
FYI: I bought in online [OLED+bio support] The quality is good its OEM.

#CSI
-read about MIUI v11, v12 related issue fod
-i noted the vendor update script/locksettingdb, persist.img..etc from few forum
-the water leak issue also made me think cause the fod failed
-some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

#GO DEEP
-current MIUI 12.0.3
-i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
-i dloaded app & test touch point. Its only support 5 finger touch not 10.
-update to MIUI 12.0.6 - can read & save but still fod failed

#Longstoryshort
-I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent
Can't find you on IG, and I hope to get answer, since that's a huge issue for me. Please give us respond.
 

manxour

New member
Nov 15, 2018
1
0
I solved it. Here's my case. (MI 9T PRO FOD failed).
-Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

#Issue: What, Why & How.
FYI: I bought in online [OLED+bio support] The quality is good its OEM.

#CSI
-read about MIUI v11, v12 related issue fod
-i noted the vendor update script/locksettingdb, persist.img..etc from few forum
-the water leak issue also made me think cause the fod failed
-some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

#GO DEEP
-current MIUI 12.0.3
-i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
-i dloaded app & test touch point. Its only support 5 finger touch not 10.
-update to MIUI 12.0.6 - can read & save but still fod failed

#Longstoryshort
-I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent
Hi Bro
I have not been able to use my fingerprint for more than a year due to this software problem,
please share your solution with us
And I did not find your Instagram ID to send a message
Please
 

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  • 1
    I solved it. Here's my case. (MI 9T PRO FOD failed).
    -Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

    Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

    #Issue: What, Why & How.
    FYI: I bought in online [OLED+bio support] The quality is good its OEM.

    #CSI
    -read about MIUI v11, v12 related issue fod
    -i noted the vendor update script/locksettingdb, persist.img..etc from few forum
    -the water leak issue also made me think cause the fod failed
    -some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

    #GO DEEP
    -current MIUI 12.0.3
    -i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
    -i dloaded app & test touch point. Its only support 5 finger touch not 10.
    -update to MIUI 12.0.6 - can read & save but still fod failed

    #Longstoryshort
    -I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent
  • 3
    After upgrading to MIUI 12 Global OTA yesterday, fingerprint unlock stopped working. When I select fingerprint unlock in settings to switch it on and enter my PIN, phone goes dark and restarts (MIUI splash screen). Any suggestions? Phone is stock and not rooted.
    Additional info: from CIT menu I ran the fingerprint sensor test. Result shows: all success. Next test (Fod fingerprint input test) gives following message: Your phone has password can not enroll fingerprint information
    Not sure I understand the result of this test. Phone of course has a password (required to set fingerprint unlock).

    Sent from my Mi 9T Pro using Tapatalk
    2
    Okay, an update.
    For me there was not any restart, i was able to register my finger, but then sensor can't recognize, and calibrate, always failed. Came back to miui 11, same. I removed the display again, and cleaned the inside of the screen and the sensor lens too.
    Then I was able to calibrate, and use, updated from updater to miui 12.0.5 and WORKED.
    With 5 point multitouch screen. Checked with more programs, for screen writes always super Amoled, or Samung super Amoled. :) Nothing changed in vendor, or anything, just flashed miui 11.0.4 with Miflash, then updated to MIUI 12. Now I will try the xiaomi.eu mdded roms.
    2
    I got mine today (second one) and I can confirm that it's good unit. Just like original, I can't even see the difference... Fingerprint works fine on miui 12, really fast, no problem at all...

    I recommend pay for a professional to change it or do it with maximum caution possible. The screen is really fragile...

    I believe change only screen is easier than change all components inside to the new frame...

    I put my three screens side by side for comparation and I noticed that the one which fingerprint unlock does not work looks thicker and fingerprint hole on amoled is clearly more opaque than the original unit and the one that I bought on this aliexpress link.

    I also received the screen + frame yesterday from that seller and WOW it's indeed a very good screen! I'm very satisfied
    the product and the seller. First the communication with the seller is top notch, he sends pictures and even a video how to test the screen before installing. He even personally tested the screen before sending it to me, it was a personal video because the package label was visible and he wrote personal codes on the screen.
    I ordered on 28th of december and I received it on 14th of January so that's fine. The screen (I ordered with frame) is TOP NOTCH!!
    It's an amoled 10 point screen and it's even better than what my repair shop used in a previous repair. Now my FINGERPRINT SENSOR IS WORKING AGAIN (bug in MIUI 12 that doesn't accept bad quality screens) It has all the original internals, it has stickers so you can fix the internals securely. Everything works as it should!!
    I RECOMMEND THIS SELLER AND HIS PRODUCT

    I had some difficulty installing it because I had to move all the internals from the previous frame to the new frame. Five times I had to close and reopen the phone (Luckily I didn't put glue on the back glass - I'm even thinking of not glueing it for a couple of weeks to be sure) because the front camera didn't open - the fingerprint sensor didn't read - the back cameras didn't work - ...
    The reason of the problems was dust or condensation. You have to make sure everything is clean and dry. I cleaned the contacts (of cameras, sensors,...) before closing them.
    TIP: Use WD40 electrical contact cleaner and compressed air afterwards to dry it quickly.

    Ok next problem: I use Xiaomi.eu ROM 21.1.6/7 and fingerprint sensor works but after 5 ticks when registering a fingerprint it closed. After calibrating the sensor in CIT menu (TIP: use thick white page for "flesh flat" and something MATTE BLACK (not shiny!!!!) for the "black flat") - calibrating was succesful - but again registering didn't work.

    I then saw there was an update for Xiaomi.EU ( 21.1.13/14 ) and now the fingerprint registering works PERFECTLY!!!

    I used this excellent tutorial (in French but filmed in a good way)

    I'm so glad, I now have a brand new phone :)

    Some pictures:
    DSCF6341.JPGDSCF6342.JPGDSCF6343.JPGDSCF6347.JPG
    1
    You've got the same problem as me after update to miui12. Have you ever replaced the lcd on your phone? Because I did it.
    1
    I solved it. Here's my case. (MI 9T PRO FOD failed).
    -Received MI9TPRO from customer 2 weeks ago (blank lcd/nodisplay cause by water leak)

    Replaced with OLED with biometric support. Bcoz i'm not the owner of coz my fprint failed to unlock. Few days later customer complaint his on-screen FOD not working. (FYI: this my 1st lcdreplacement for on-screen biometric. i just know these FOD issue when customer return-back his phone ask me to fix the fod problem or return back his money.

    #Issue: What, Why & How.
    FYI: I bought in online [OLED+bio support] The quality is good its OEM.

    #CSI
    -read about MIUI v11, v12 related issue fod
    -i noted the vendor update script/locksettingdb, persist.img..etc from few forum
    -the water leak issue also made me think cause the fod failed
    -some say fod will only work if lcdscreen support 10finger touch a.k.a original/high price.

    #GO DEEP
    -current MIUI 12.0.3
    -i deleted owner fod and adding my fprint. I successfull scan, read & add+save my fprint. But still it failed to unlock & not recognise my finger.
    -i dloaded app & test touch point. Its only support 5 finger touch not 10.
    -update to MIUI 12.0.6 - can read & save but still fod failed

    #Longstoryshort
    -I finally solved the problem. Its software issue. I cannot elaborate details here (limited time) however i will post a.s.a.p. I made short videos & can proove it. Email me or IG: mystremiumz if urgent