Samsung Galaxy A51 Fingerprint Sensor Calibration needed - Samsung Galaxy A51 Questions & Answers

I have an issue on Samsung A515U
I already did factory data reset and upgraded to Android 11, nothing works.
I'm searching for firmware of Android 9 for this model and haven't found it yet.
Can anyone help me pls

Hello!
You can check the Samsung Fingerprint Sensor with Samsung Phone Code.
Just dial (like typing in a phone number) the Samsung Sensor Code: *#0*#
Then tap on Sensor, where you can check Samsung Accelerometer Sensor, Gyroscope Sensor, DL Magnetic Sensor, and Fingerprint Sensor.
In the Fingerprint section, Tap on “Normal Scan” and see which tests it passes and which one fails.
This is just an information, you can't repair or change anything.
Your plan to downgrade to an older android version is NOT a good idea.
They made very important changes (filesystem, security, framework structure....) in the newer versions. You might brick your phone and can't use it anymore.
To improve your fingerprint take a look at this postings Speed up fingerprint
Good luck!

Thanx for answering
I've already done what you mentioned and didn't work. I checked the sensor dialing that code and it seems to be good

Same issue here... did you get yours fixed yet?

same here, I do factory reset but no fix.
why this happen ?
solution: I went to a service store and they replace the sensor.

The test reports that the sensor is ok (all tests show as PASS), but I still get the "Fingerprint sensor calibration needed" message.
How can I calibrate the sensor? Where can I find the procedure?
dornfinger4 said:
Hello!
You can check the Samsung Fingerprint Sensor with Samsung Phone Code.
Just dial (like typing in a phone number) the Samsung Sensor Code: *#0*#
Then tap on Sensor, where you can check Samsung Accelerometer Sensor, Gyroscope Sensor, DL Magnetic Sensor, and Fingerprint Sensor.
In the Fingerprint section, Tap on “Normal Scan” and see which tests it passes and which one fails.
This is just an information, you can't repair or change anything.
Your plan to downgrade to an older android version is NOT a good idea.
They made very important changes (filesystem, security, framework structure....) in the newer versions. You might brick your phone and can't use it anymore.
To improve your fingerprint take a look at this postings Speed up fingerprint
Good luck!
Click to expand...
Click to collapse

yossidme said:
The test reports that the sensor is ok (all tests show as PASS), but I still get the "Fingerprint sensor calibration needed" message.
How can I calibrate the sensor? Where can I find the procedure?
Click to expand...
Click to collapse
Well this looks like a problem faced by most Samsung users after updating their phones. There is no exact way to fix this since Samsung is yet to release a fix to this issue.
But you can try this:
Change your lock, to swipe to unlock, which will delete your fingerprint data. Then set up your fingerprint lock again, rescanning your fingerprints like you did the first time you set your lock screen options.

I had/have the same issue after installing a backup of one A51 to another A51.
All runs fine, but the fingerprint.
Doing a factory reset -> fingerprint is OK and working.
Using the copy on the "wrong" phone -> fingerprint is NOT working
So it's no hardware issue, but I have not found a solution yet

Try to reflash the whole system with Odin and get the software from samfw

Related

Fingerprint sensor calibration problems

When i enter the testing menu on *#0*# and test the fingerprint sensor i get 1 pass and other tests fail. My fingerprint scanner is working fine btw. Can anyone tell me why this is happening and whats their phone's status ? Tia
I have been looking for an explanation as well. I've tested this on my S6, and two S6 Edge straight out the box. They all failed in at least two tests.
As long as the fingerprint sensor is working though, I don't really care.

Proximity sensor and others not working properly after android 10 update

My Pixel 3's proximity sensor reads 0cm after android 10 update(using Sensors Multitool), and double tap to wake and lift to wake not working.
I've search on the internet and I read the post of "FIXED - Android 10 - Sensors Bug". and also tried using proximity sensor reset or calibrate app, but all seem not working.
In my case, all other sensors works perfectly(Active Edge,Ambient Light Sensor, Auto-brightness, Accelerometer, Auto-rotation), but proximity sensor have reading of 0cm all the time. Which make the screen black when having a phone call. And double tap/lift to wake is not working(although my accelerometer is working according to sensors multitool).
I don't have screen protector, and this problem happened just after i first updated it to android 10. so i think it might be just a software problem.
I had the october update already, but it is not fixed.
And this is a phone that never oem unlocked or rooted, no trwp installed ever, so it might be a different problem rather than that FIXED one.
I live in a country that I could not send the phone back for repairing or replacement, and i have to use adb sideload to install every ota
(and most of time when I switch my camera to frontfacing camera, it will buzz and vibrate, but when i switch back to rare and back to front, it can be fixed. this is another small issue, but it happened before this update already, maybe i just need to mention it)
Any idea what might cause this and how can I fix them?
Thanks.
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
TonikJDK said:
https://forum.xda-developers.com/showthread.php?t=3967525&p=80233629
Click to expand...
Click to collapse
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
zhangcx93 said:
i read this already and my issue is not the same one as mentioned...
in that issue, all sensors are dead, but not in my case.
my device is never unlocked or rooted, no twrp installed, so maybe nothing has right to write the persist?
and if it is the same one, it should be fixed in october patch, but mine is not FIXED at all.
Click to expand...
Click to collapse
I factory reset my device yesterday and it fixed a lot of errors I was getting. Have you tried factory reset?
Be sure the phone has backed up to the google drive

Fingerprint sensor not works with miui11

I have a problem with the fingerprint sensor.. Since I switched to miui 11 with android 10 the sensor worked at times. It works for a day or two, then the menu disappears from the settings and i can no longer use it.
I try tu update vendor partition, wipe data, format data, reinstall new rom with all wipes, reinstall stock rom with Mi FlashTool, any solution works..When i wipe all, it works for a while and than, suddenly, doesn't work anymore!!
I have Mix 2S, i'm sure that is not an hardware problem..
Replace fingerprint sensor
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Kaliotto said:
I don't know why you say that you're sure that it's not a hardware problem, but to me, it sounds like the sensor is broken. I suffered this issue in my own Mi Mix 2s and it was caused because the "cable" of the sensor was folded (it's not really a cable, it's more like a flat plastic connector) and it worked one day and not the next. I finally decided to fix it by myself, looking for a youtube video about disassembling the phone and with these tools and the replacement sensor it was pretty easy (and quite cheap, frankly). I hope it helps!
Click to expand...
Click to collapse
I had the same problem. Mi mix 2s had a problematic/bad assembly line.
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
This problem is very boring!!! Have you try a solution, or a temporary fix???
No, I have no idea how to fix. Seems we have to wait till the next update from Xiaomi, which hopefully will fix the problem. It is really boring.
Jörg Krug said:
I have exactly the same issue. After Android 10 update the fingerprint sensor works for a while. After one day I recognized that the fingerprint sensor is not working anymore. And there are no options or settings in the system settings anymore. So I assume a software problem.
Click to expand...
Click to collapse
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
cdfs said:
Your assumption is wrong... these options will not show up if the system can't find the fingerprint sensor... Had the same problem and it turned out to be a hardware fault, exactly like mentioned by Kaliotto. You can do a simple test via CIT (tap multiple times on kernel-version). You will find a fingerprint sensor check in there. If it does not find the sensor, it is broken, simple as that. Replacing the sensor is really no voodoo, did it in a timeframe of 30 minutes myself and it was really the first time I ever opened a smartphone. And the parts are really cheap.
Click to expand...
Click to collapse
I read on differents sites a lot of people who had problems with fingerprint sensor after upgrading to miui 11 with android 10..i don't think that all of us had hardware problem at the same time of the upgrading, it's very strange...
so, to avoid any doubt, i'm searching a new fingerprint sensor..the site suggested in the second posts seems to have problems with payment, any times i try to buy with paypal o credit card, the payment was refused..so i'm searching another reliable site..
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Jörg Krug said:
I solved the problem. In my case it was defenitely a software bug. I tried to run the fingerprint test at CIT and the phone reminded me that the phone is protected by a PIN and can not enroll fingerprint information. So I switched of the PIN protection and the fingerprint test runs positive. Since that time, the fingerprint options in the setting was back again and I was able to setup the fingerprint sensor as usually.
So I thing the deactivation of PIN protection was the solution to get the fingerprint sensor working again.
Click to expand...
Click to collapse
So, you only disabled pin in the lockscreen (and set swipe method to unlock the phone)??
I tried now disabling pin and restarted the phone, but no options in the settings menu
Can you give me more details? Thanks
Update! After one day of use, I have to say, that the fingerprint sensor still does not work proper. After a while the fingerprint sensor stops working again. I played around with the settings, disabled the PIN protection and start the phone several times and than the fingerprint sensor was working again for a while. There is still something wrong. Also the CIT test sometimes pass and sometimes fail. Maybe it is hardware failure after all.
What I did: I disabled the password (PIN) protection, means no protection at all. After that I was able to run the fingerprint sensor test at CIT ( as cdfs wrote). This test was pass and the settings to configure the fingerprint sensor appears again in the system settings and the sensor worked for a while.
Since this procedure the function of the sensor is not consistent and I can not definitely say what to do to get it works. In the meantime I think that all the described workaround just works by accident.
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Try it yourself and give me your feedback
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Hello,
so I at the end found some users, having exactly that problem!
I bought a new sensor and changed it. Pixel Opem Test failed.
I bought another sensor with the same result: Pixel Open Test failed.
Is there a usefull solution?
Mi Mix 2s MiUi 12 xioami.eu
fefuzzo said:
NEWS: i changed stock kernel with two modded kernel (Twisted v22 && LawRun9.0_60hz) and fingerprint start to works again!!!
So, my idea was real: it's a software problem!!!!
Click to expand...
Click to collapse
I had a try with twisted kernel V28.
Unfortunately it dind't solve the problem for me
meeven said:
Hi,
I had also the issue that the fingerprint sensor was not recognized. I replaced it.
Then the option was there again but it doesn't read any fingerprints.
The CIT test fails by the last step "Pixel open test"
Then I got a second new fingerprint sensor and replaced it again.
The test fails again in the last step!
These are the CIT messages:
Autotest: Testing
SPI test: Success
Reset pin test: Success
Interrupt pin test: Sucess
Pixel open test: FAIL
So I would say it is a Software Issue
Click to expand...
Click to collapse
Hello currently I am using mi note 9 pro but I am having fingerprint issue there is fingerprint option missing I am not able to mange fingerprints. Plz somebody help me

Umidigi S5 Pro FP Sensor Calibration

I've just replaced the screen on my friends S5 Pro and currently don't have a working FP sensor. I've double checked and the sensor is seated correctly and there is nothing obscuring its little window on the screen.
I want to recalibrate the sensor, but cannot find a way to do this. All of the useful dialer hidden codes are disabled. It might be that doing a factory reset or re-flashing the full firmware would trigger the sensor to calibrate itself, however my friend spent days getting everything just how he likes things and says he'd rather live without the sensor than have to set everything up again and doesn't trust non-root backup solutions to work properly. He doesn't want to unlock his bootloader, so rooting is out of the question.
Does anyone know of any way to get into some kind of engineering mode on this phone to be able to force a fingerprint sensor calibration?
Robbo.5000 said:
I've just replaced the screen on my friends S5 Pro and currently don't have a working FP sensor. I've double checked and the sensor is seated correctly and there is nothing obscuring its little window on the screen.
I want to recalibrate the sensor, but cannot find a way to do this. All of the useful dialer hidden codes are disabled. It might be that doing a factory reset or re-flashing the full firmware would trigger the sensor to calibrate itself, however my friend spent days getting everything just how he likes things and says he'd rather live without the sensor than have to set everything up again and doesn't trust non-root backup solutions to work properly. He doesn't want to unlock his bootloader, so rooting is out of the question.
Does anyone know of any way to get into some kind of engineering mode on this phone to be able to force a fingerprint sensor calibration?
Click to expand...
Click to collapse
The fingerprint sensor went completely over the cuckoo's nest in my Umidigi S5 Pro for no apparent reason, now I can't use it at all. Any ideas?
Same thing happened to me shortly after an OTA update if I remember correctly... any luck with a fix thus far?

Asking for a favor from anyone in the Zenfone 7/7 Pro community

Hey! I'd like to ask a favor from someone with a Zenfone 7 in their hands. Could you tell me the driver name of your proximity sensor? You can check it by using Sensor Box (free on the playstore).
I'm asking for this because it seems my phone doesn't even recognise the driver and it just displays as ASUS Proximity Sensor, opposedly to other sensors that display their true name. Maybe I'm tripping and that's just it's real name, but I'm almost sure it had a different name before the sensor started malfunctioning.
I'll attach a couple screens. Thank you in advance.
Here's some screenshots from a borrowed Zenfone 7 Pro, as you can see it's named the same.
To be sure we don't suffer the same fate I did some tests to confirm that sensor is working.
@zcrubby Thank you! Indeed your sensor works well. I'll keep trying to figure out where to find the root folder of the proximity sensor driver to disable it, since I was able to get sensor disabler functioning but didn't do the trick with the proximity sensor. Would you let me know if you know something? Much appreciated!
tommydotwav said:
@zcrubby Thank you! Indeed your sensor works well. I'll keep trying to figure out where to find the root folder of the proximity sensor driver to disable it, since I was able to get sensor disabler functioning but didn't do the trick with the proximity sensor. Would you let me know if you know something? Much appreciated!
Click to expand...
Click to collapse
Any luck in disabling the proximity sensor? I have a strange bug wherein every restart of the device causes the first instance of the camera to flip upside down and come up with the camera obstruction error. But once you click ok several times it's fine.

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