Question Fingerprint reader issues on S21+ - Samsung Galaxy S21+

I need 5-10 times to open my phone.
Now I have my primary thumbprint in 4 slots. My phone is up to date.
I spend more then 6 hours to try to solve the issue. But nothing help.
I use a screen protector Link and I need it. But I had also issue without screen protector.
900 $ phone...

Richi207 said:
I need 5-10 times to open my phone.
Now I have my primary thumbprint in 4 slots. My phone is up to date.
I spend more then 6 hours to try to solve the issue. But nothing help.
I use a screen protector Link and I need it. But I had also issue without screen protector.
900 $ phone...
Click to expand...
Click to collapse
have you tried to remove and re-register fingeprints?
and this happened after the software update?
do you have exynos or snapdragon?

Richi207 said:
I need 5-10 times to open my phone.
Now I have my primary thumbprint in 4 slots. My phone is up to date.
I spend more then 6 hours to try to solve the issue. But nothing help.
I use a screen protector Link and I need it. But I had also issue without screen protector.
900 $ phone...
Click to expand...
Click to collapse
Report the issue via the Samsung Members app if you're still facing the issue.

Richi207 said:
I need 5-10 times to open my phone.
Now I have my primary thumbprint in 4 slots. My phone is up to date.
I spend more then 6 hours to try to solve the issue. But nothing help.
I use a screen protector Link and I need it. But I had also issue without screen protector.
900 $ phone...
Click to expand...
Click to collapse
That is not normal, the fingerprint is very accurate on my phone, my old s10+ had an horrible fingerpring sensor...

The fingerprint sensor seems to work well in my S21+, but sometimes, after I authenticate with my fingerprint, I get a black screen with a white round icon with a lock in the button of the screen. It doesn't happen all the time, but I've been unable to identify the condition that causes it to come up. Does anyone else get this secondary black screen or knows the reason for this annoying secondary screen?

Some tips I can give are:
1.- Delete all fingerprints and add them with the scren protector, pressure before the scren protector is different.
2.- Enable enhanced touch sensitivity.
Keep in mind that under display fingerprint readers are not really designed to work perfectly with screen protectors. I had that issue with the Note 20 ultra and I've read about the same issue with the s21 ultra and s21 plus. Im using the scren protector that came from factory (I know it doesnt really protect) but fingerprint sensor is blazing fast.

joancolmenares said:
Some tips I can give are:
1.- Delete all fingerprints and add them with the scren protector, pressure before the scren protector is different.
2.- Enable enhanced touch sensitivity.
Keep in mind that under display fingerprint readers are not really designed to work perfectly with screen protectors. I had that issue with the Note 20 ultra and I've read about the same issue with the s21 ultra and s21 plus. Im using the scren protector that came from factory (I know it doesnt really protect) but fingerprint sensor is blazing fast.
Click to expand...
Click to collapse
I just realized that this secondary screen only pops up after I use fingerprint sensor from the AOD screen. This secondary screen doesn't show when I use the fingerprint sensor from the Lock screen. Why have the ability to use the fingerprint sensor from the AOD screen if it's just going to take you to this alternative black lock screen?

tamanaco said:
I just realized that this secondary screen only pops up after I use fingerprint sensor from the AOD screen. This secondary screen doesn't show when I use the fingerprint sensor from the Lock screen. Why have the ability to use the fingerprint sensor from the AOD screen if it's just going to take you to this alternative black lock screen?
Click to expand...
Click to collapse
Maybe a bug...This secondary lock screen only comes up when I set "Show icon when screen is off" to (On Always On Display) under Fingerprint settings. If I change this setting to (Tap to show) the secondary screen doesn't pop up. Not a show stopper, but a little annoying as I have to tap the screen to see the fingerprint icon. Anyone else getting this secondary screen after using the fingerprint sensor from the AOD?
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Related

[APP][2.3+] SMART SCREEN ON OFF with ANIMATION

Hi every one!
This is my app, You can download using trial and feedback for me to improve it.
Big Thanks.
Turn on/off the screen your device don't need power button.
*** DOUBLE TAP on Status Bar to Screen OFF***
Link download on google play
https://play.google.com/store/apps/details?id=dev.suriv.suscreen
You can turn on/off the screen your device don't need power by many way below:
***SHAKE SENSOR***
- Shake to Screen ON
- Shake to Screen OFF
- Recognizes when device in the pocket
***PROXIMITY SENSOR***
- Swiping over Proximity Sensor to Screen ON/OFF
***SMART COVER***
- Proximity Smart Cover feature for user using Flip Cover (If you use a phone case with cover, just close the cover to turn screen off. and open the cover to turn screen on).
- So with Smart Cover feature you just put the phone in your pocket to turn screen off, and take the phone out from your pocket to turn screen on.take it out of the pocket the screen auto turn on.
***GRAVITY SENSOR***
- When device on hand = Screen ON
- When device face down or in the Pocket = Screen OFF
***Suggestions***
- Double Tap on Status Bar to Screen OFF
- Shake to turn off, use the proximity sensor to open the screen to the most comfortable and most effective.
- When only opening screen features with the proximity sensor when taking the phone out of the bag itself on the screen.
- Besides you can very much for the way how to shut off by different types of sensors.
DEMO
https://www.youtube.com/watch?v=bbeEkkraH7s
*** IMPORTANT NOTE ***
Unfortunately in some devices, the accelerometer sensor cannot be used when the screen is OFF so you can't turn on screen by feature 1 and 3.But if you checked option for device do not turn on the screen, you can use Proximity or Smart Cover feature to turn on/off the screen.
Check your device on link:
http://www.saltwebsites.com/2012/android-accelerometers-screen-off
How to uninstall app :
If this app is activated you can click on Deactivate button, after that you uninstall this app normal.
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let't try it guys.
nice app working fine in note 2.
Sent from my GT-N7100 using XDA Free mobile app
khankk42 said:
nice app working fine in note 2.
Sent from my GT-N7100 using XDA Free mobile app
Click to expand...
Click to collapse
Thanks for using
This apps support more 10 language.
Tried it on Xperia T2 Ultra. working good. Thanks.
fazal.mehmood said:
Tried it on Xperia T2 Ultra. working good. Thanks.
Click to expand...
Click to collapse
Thanks for using.
Smart screen on off version 2.8 with new feature double tap on status bar to screen off (No root).
https://play.google.com/store/apps/details?id=dev.suriv.suscreen
Pro version support : Double tap Home screen to screen off, animation screen off (No Root), Lock and unlock with sound.
https://play.google.com/store/apps/details?id=dev.suriv.smartscreenonoffpro
Let try it guys.
Thanks.
nice app work in grand 2:good:
7ama Yk said:
nice app work in grand 2:good:
Click to expand...
Click to collapse
Thanks you!
Smart Screen on off with can double tap status bar to screen off (no root) . You don't need widget to do this. So simple and useful
Smart Screen Pro version 2.6
- With feature Smart Unlock, Auto disable password, Pattern, PIN when device connected with Trusted Wifi.
- Many Effect screen off
Get It:
https://play.google.com/store/apps/details?id=dev.suriv.smartscreenonoffpro
Smart Screen ON OFF with feature Double Tap on StatusBar screen OFF (No root). You don't need xposed module to do this.
devsuriv said:
Thanks for using
Click to expand...
Click to collapse
Hey, this is awesome!
You think you can create an app that allows us to restart the phone in just one click? Like the laptop?
Thanks!
Lhm2015 said:
Hey, this is awesome!
You think you can create an app that allows us to restart the phone in just one click? Like the laptop?
Thanks!
Click to expand...
Click to collapse
Hi, Thanks for using.
The new app will add this feature.
Coming soon.
The new Update , Let try it guys
Ver: 3.2.2 New UI, improve performance app.
https://play.google.com/store/apps/details?id=dev.suriv.suscreen
Smart sceen Pro Smart lock and unlock your device
Lhm2015 said:
Hey, this is awesome!
You think you can create an app that allows us to restart the phone in just one click? Like the laptop?
Thanks!
Click to expand...
Click to collapse
If you want to using this feature you can see more my new apps.
Status Bar Pro.
https://play.google.com/store/apps/details?id=com.devsuriv.smartstatusbar

Z5 has the WORST finger print scanner, or is it just mine?

It's absolutely RIDICULOUS how bad my finger print scanner is... I don't think I've ever been able to successfully unlock my phone with a finger print for more than 10 mins or so....... And when I go to add a new finger print, it ALWAYS tells me to wipe my sensor off... ONLY thing I can think about is because I naturally have clammy hands, but there's no way SONY can brag about the finger print scanner , when I can type my 13 digit number pass in faster than getting the finger to unlock it...
I'll literally add a finger print, unlock the phone a couple times, then the print won't register at all after a few mins, and I'm not able to add more unless I delete ALL of the prints ( I make more than one of each finger for better accuracy) and start over.... about every 20 minutes... Do I have a faulty scanner?
You have sweaty fingers?
Mine is pretty much instantaneous (3 different fingers programmed)
LitoNi said:
You have sweaty fingers?
Click to expand...
Click to collapse
Either bone dry or wet .... weird body temperature moderation hahaha , worst part is , If i register a "wet" print, when my fingers are eventually dry enough.. I can't add more prints cause it legit won't accept my dry finger as a wet finger AT ALL , forcing me to remove all finger prints registered
Same problem here on a z5 dual 6683... My phone doesn't even register fingerprints anymore...
Funny thing also, I can't seem to find the fingerprint diagnostic tool in the diagnostic setting either... Can anyone check?
ml2514 said:
Funny thing also, I can't seem to find the fingerprint diagnostic tool in the diagnostic setting either... Can anyone check?
Click to expand...
Click to collapse
It's everywhere!
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EDIT: I don't know what the Fingerprint sensor diagnostic (the one under Settings - Support - Tools, etc) is supposed to do. My fingerprint sensor works perfectly but fails this test completely. The diagnostic never picks up ANY fingerprint scans... :/
tutchthesky7 said:
It's absolutely RIDICULOUS how bad my finger print scanner is... I don't think I've ever been able to successfully unlock my phone with a finger print for more than 10 mins or so....... And when I go to add a new finger print, it ALWAYS tells me to wipe my sensor off... ONLY thing I can think about is because I naturally have clammy hands, but there's no way SONY can brag about the finger print scanner , when I can type my 13 digit number pass in faster than getting the finger to unlock it...
I'll literally add a finger print, unlock the phone a couple times, then the print won't register at all after a few mins, and I'm not able to add more unless I delete ALL of the prints ( I make more than one of each finger for better accuracy) and start over.... about every 20 minutes... Do I have a faulty scanner?
Click to expand...
Click to collapse
my works very well. 5 fingers programmed and it only fails when i dont put my fingers over the senor properly.
I found my scanner improved after doing a factory reset. If you haven't done a reset since buying the phone, I would recommend it for several reasons including the scanner.
ricodredd said:
It's everywhere!
View attachment 3579657 View attachment 3579658
EDIT: I don't know what the Fingerprint sensor diagnostic (the one under Settings - Support - Tools, etc) is supposed to do. My fingerprint sensor works perfectly but fails this test completely. The diagnostic never picks up ANY fingerprint scans... :/
Click to expand...
Click to collapse
I swear, it disappears at time. this HAS to be a software issue.
Dear all,
I am using sony Z5 from last one month, no issues what so ever with fingerprint scanner, it's damn accurate. Till date no issues

Fingerprint unlock (screen) without pin. List of Roms with this option

Hello there,
Using xiaomi a1, I have come to appreciate this useful option which is the screen unlock using fingerprint without Pin (or pattern). Just touch the sensor and screen is unlocked. Can't get it easier.
So, following are the custom Roms that have this feature enabled :
Resurrection Remix
Lineage Extended
Firehound
There is a magisk module for stock users that can find in the A1 app section too.
I haven't tried all the Roms, so please write them here to make the list complete.
Thank you
Don't know what you talking about but with completely stock you don't need to enter PIN while using fingerprint sensor. Well, you need, but only first time after turning on the device. After that it always unlocks without entering PIN. For pattern I don't know, never tried.
What the hell are you talking about? Stock firmware allows you to unlock simple by fingerprint (touch the sensor with screen on or off and it unlocks). You just need a pin or pattern during the setup or in case of fingerprint hardware failure.
This option he is talking about is for people who do not want to use PIN / Pattern, the digital printing only works if you put a password and in case there is no password, it works to turn on the screen.
bfmdesigner said:
This option he is talking about is for people who do not want to use PIN / Pattern, the digital printing only works if you put a password and in case there is no password, it works to turn on the screen.
Click to expand...
Click to collapse
But if you dont set a pin/pattern for "extra security", the day that fingerprint sensor breaks (or fails do recognize you fingers) you cant unlock your phone at all... Doesnt make sense..
Guys relax.
Life is beautiful. I am talking about custom Roms.
I haven't used stock rom, since the first day of using this phone, and I didn't remember that you could unlock with fingerprint only after screen locking the device. So, I might have made a confusion about stock rom. My bad.
bfmdesigner said:
This option he is talking about is for people who do not want to use PIN / Pattern, the digital printing only works if you put a password and in case there is no password, it works to turn on the screen.
Click to expand...
Click to collapse
Exactly! Finally.
nitroax said:
But if you dont set a pin/pattern for "extra security", the day that fingerprint sensor breaks (or fails do recognize you fingers) you cant unlock your phone at all... Doesnt make sense..
Click to expand...
Click to collapse
My god, this function is for those who DO NOT want to use PASSWORD, it does not lock the phone if it fails, it only adds the function of turning the screen on for those who DO NOT want a password.
Ok, I am explain better. There are 2 (or 3) types of lock as the picture below explains. When you do a device admin lock via several lock screens applications (found on Google play) you can't unlock via Fingerprint only. You need the pin or the pattern after.
The rom mentioned by me have this option included. I am surprised that none is giving feedback, so far.
Any other Roms that do have this "Unlock with fingerprint without pattern" as an option?
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CrDroid does this too.
Edit. Sorry, I read your second explanation and CrDroid does it but paired with pattern. It only asks once after rebooting the device, which is nice, in my opinion.
gartzen said:
CrDroid does this too.
Edit. Sorry, I read your second explanation and CrDroid does it but paired with pattern. It only asks once after rebooting the device, which is nice, in my opinion.
Click to expand...
Click to collapse
Then CrDroid doesn't have this option, I am afraid.
This is the option that I would like all of us share our comments on it.

Auto brightness issue

I've noticed that my brightness keeps changing for no reason. It would randomly increase for a second and then go back. And it sometimes keeps doing that like it is caught in a loop.
Has anyone else noticed anything similar?
If only happen in certain place, check if there are sources of IR or UV in the environment, like a surveillance | remote control | fish tank..., light sensor also sensitive to invisible light.
Also can do a test, in stable light source cover/release light sensor, use some sensor test app, if the reading jump like hell, maybe something error with hardware or system.
And don't use case during test, notch-less phone's light sensor on the very edge of the top glass, most third-party case actually blocked a bit.
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ULTRAJC said:
If only happen in certain place, check if there are sources of IR or UV in the environment, like a surveillance | remote control | fish tank..., light sensor also sensitive to invisible light.
Also can do a test, in stable light source cover/release light sensor, use some sensor test app, if the reding jump like hell, maybe something error with hardware or system.
And don't use case during test, notch-less phone's light sensor on the very edge of the top glass, most third-party case actually blocked a bit.
View attachment 5327539
View attachment 5327545
Click to expand...
Click to collapse
Thank you for your suggestions. I've already looked into the sensor data, and did not find any significant errors.
What I did find however, is that the sensor seem to be really sensitive. I found a certain position at my room desk, where the illuminance measured by the sensor fluctuates sporadically even if I turn the phone by 1 degree. I don't know how these sensors work, but it seems to be taking data from the point it is directly facing. In my case, this causes the value to jump between 10 and 30 lux, which is apparently enough to change the brightness level. I am using the preinstalled screen protector, so that might cause some random light refraction.
ULTRAJC said:
If only happen in certain place, check if there are sources of IR or UV in the environment, like a surveillance | remote control | fish tank..., light sensor also sensitive to invisible light.
Also can do a test, in stable light source cover/release light sensor, use some sensor test app, if the reding jump like hell, maybe something error with hardware or system.
And don't use case during test, notch-less phone's light sensor on the very edge of the top glass, most third-party case actually blocked a bit.
View attachment 5327539
View attachment 5327545
Click to expand...
Click to collapse
Also, the circle at the back above the flash, is that another light sensor?
Miha512 said:
Also, the circle at the back above the flash, is that another light sensor?
Click to expand...
Click to collapse
Yes, you reminded me, that's ambient light sensor too, also affects screen brightness. third party software cannot detect that sensor. but still can do "cover" test look at the screen brightness changes
ULTRAJC said:
Yes, you reminded me, that's ambient light sensor too, also affects screen brightness. third party software cannot detect that sensor. but still can do "cover" test look at the screen brightness changes
Click to expand...
Click to collapse
Are you sure that is also a brightness sensor? Nothing happens when I cover mine. Can you please test on yours?
Your browser is not able to display this video.
ULTRAJC said:
View attachment 5332511
View attachment 5332513
Click to expand...
Click to collapse
Thank you so much for your time and effort! I feel kinda stupid for not doing a test like this before... Either way, mine reacts to a flashlight as well, and to dimmer light as well if I cover the front sensor. Thanks again and have a nice day!
ULTRAJC said:
View attachment 5332511
View attachment 5332513
Click to expand...
Click to collapse
Also, just one more thing. Do you have any explanation for this - https://photos.app.goo.gl/r4WfrqxKYKGq5np6A
The whole thing is really annoying as it keeps randomly increasing/decreasing the brightness while the ambient light remains the same. It does only seem to happen with illuminance levels between 10 and 30 lux, so I'm not sure if it could be hardware related...
That reading seems glitch to me, if lighting is stable.
Maybe is the hardware…
Your browser is not able to display this video.
ULTRAJC said:
That reading seems glitch to me, if lighting is stable.
Maybe is the hardware…
View attachment 5333233
Click to expand...
Click to collapse
It is weird, as it only happens in one room. I've also tried with my girlfriend's Nord, and it jumped between 10 and 80 at a similar spot. Whatever, thanks!

New Fingerprint Sensor does not work after Screen Replacement

I have replaced the broken screen of my Oneplus 8T (KB2003), where I have used a screen already attached to a new frame including the fingerprint sensor from AliExpress. The delivered screen with frame etc. looked exactly like the original one. This means I actually just had to switch over all parts inside the device. The phone is not rooted (never was) and still uses the stock recovery.
Now, everything works, except the fingerprint sensor. In Android 13 (Oxygen OS 13) the icon of the fingerprint appears on the screen, but the fingerprint is neither recognized nor there is a vibration. I already tried the following things:
delete all pins and fingerprints and reboot in Android 13
delete all pins and fingerprints in safe mode and reboot in Android 13
wipe all data (in the stock recovery)
factory reset
downgrade to Android 11 (via local install of the zip), here an error appears if I try to register a new fingerprint: "Error during fingerprint registration, please try again"
delete all pins and fingerprints and reboot in Android 11
delete all pins and fingerprints in safe mode and reboot in Android 11
Now the interesting part comes: If I boot the device with the old fingerprint sensor connected (Android 11 or 13), and switch to the new one while the phone is running, everything works. This means I can use the fingerprint of the new screen, register new fingers etc. with the new sensor. Once I reboot the phone, it does not work any longer.
Does anyone have an idea what I could try to be able to use the new fingerprint sensor even after a reboot? Thank you!
diebelsalt said:
Does anyone have an idea what I could try to be able to use the new fingerprint sensor even after a reboot? Thank you!
Click to expand...
Click to collapse
I suppose it's done for safety measures.
It seems there is some fingerprint sensor check validity is happening on boot.
If it's recognized as factory one, it works, if not it doesn't.
In your case you were just hotswapping sensors on running android, so the check doesn't detect it, but on boot, it detects non original one.
That would be a pity.
Yesterday I have removed the original fingerprint sensor from the broken display. I did some pictures:
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Interestingly, also the small black part located between the actual sensor and the silver part at the cable (first picture) has a small transparent window in the screen.
Now I am considering removing my new screen from the repaired phone and try to exchange the fingerprint sensor. Actually, I wanted to avoid this and bought the display already attached to a (new) frame. At least it would be interesting whether there is an obvious difference between both sensors.
diebelsalt said:
Now I am considering removing my new screen from the repaired phone and try to exchange the fingerprint sensor. Actually, I wanted to avoid this and bought the display already attached to a (new) frame. At least it would be interesting whether there is an obvious difference between both sensors.
Click to expand...
Click to collapse
Thanks for information.
Keep us updated on this case.
I would use the msm tool as this would restore to original factory setting and write new partition data according to your hardware. This may register the new fingerprint sensor as authentic and would be calibrated during first boot. It's worth a try, I doubt it would work any other way. You can find msm tools all over xda! Good luck getting it to work!
diebelsalt said:
I have replaced the broken screen of my Oneplus 8T (KB2003), where I have used a screen already attached to a new frame including the fingerprint sensor from AliExpress. The delivered screen with frame etc. looked exactly like the original one. This means I actually just had to switch over all parts inside the device. The phone is not rooted (never was) and still uses the stock recovery.
Now, everything works, except the fingerprint sensor. In Android 13 (Oxygen OS 13) the icon of the fingerprint appears on the screen, but the fingerprint is neither recognized nor there is a vibration. I already tried the following things:
delete all pins and fingerprints and reboot in Android 13
delete all pins and fingerprints in safe mode and reboot in Android 13
wipe all data (in the stock recovery)
factory reset
downgrade to Android 11 (via local install of the zip), here an error appears if I try to register a new fingerprint: "Error during fingerprint registration, please try again"
delete all pins and fingerprints and reboot in Android 11
delete all pins and fingerprints in safe mode and reboot in Android 11
Now the interesting part comes: If I boot the device with the old fingerprint sensor connected (Android 11 or 13), and switch to the new one while the phone is running, everything works. This means I can use the fingerprint of the new screen, register new fingers etc. with the new sensor. Once I reboot the phone, it does not work any longer.
Does anyone have an idea what I could try to be able to use the new fingerprint sensor even after a reboot? Thank you!
Click to expand...
Click to collapse
I have same issue like you, do you know how to fix it?

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