Finger print sensor not working on samsung s20 5g

[Sise93]

Hi everyone,

I have a Samsung s20 5g (SM-G981B/DS) and it has been one month since my phone cannot recognize my fingerprint. I tried several suggestions that I found in this community, e.g:

1- Clean the screen and remove the old glass protection

2- Force reboot by holding low volume + power off buttons

3- Remove and add new fingerprints

4- Update firmware of the sensor, current version 6.0.0.6

5- Update firmware of the phone, current version G981BXXUEFVDB/G981BOXMEFVDB/G981BXXUEFVDB (1-May-2022)

6- Run sensor test by opening the phone and dialling *#0*#: Sensor>fingerprint test>normal scan

It failed to measure the DBIAS_TUNED_DBIAS_VOLTAGE, I cannot find on the internet what could cause this problem and how to solve it.

Thanks in advance for your help.

[KBennett918]

Have you tried going to your settings and clicking on "biometrics and security" >"more biometrics settings" >"biometrics security patch."

[Sise93]

Hi, yes I have.

It says "The most recent version is installed".

[Tunna]

My finger print does not work sometimes

[ShaneKandhai]

Do you have a screen protector on your phone, I have to use a fingerprint sensor film under my screen protector for it to work.

[Sise93]

Hi. I removed the screen protector, once the problem is fixed I'll buy a fingerprint sensor film as you suggested.

[Who_Dis]

if it still fails even with out the protector, then it could be defective sensor... you can check at an authorized repair center. 

if you have a lot of scratches on the glass then that also could be a cause (less likely in my opinion)

[Sise93]

Yes, I also think is a problem with the sensor itself, but I wanted to check the different options before bringing it to the center.

Thanks

[Who_Dis]

oh you shared the test result from *#0*# testing.

yea... i'm leaning towards part swap... not sure what the cost will be, wouldn't expect to pay a whole lot tho