Original topic:

Z Fold 4 fingerprint sensor corrupted after UI 7.0/8.0 updated

(Topic created: 11-21-2025 03:00 PM)
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babajeeds
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Hello, at some point last week (I've had the phone for about 3 years) my fingerprint sensor stopped working when trying to unlock the phone. I originally updated was on UI 7.0 and encountered the failure then; I hoped updating to UI 8.0 would fix it, but it did not.

I've tried restarting, cleaning the sensor, wiping the caches, etc. I tried resetting acessibility which I think has now caused my original fingerprint to be deleted, so now I cannot add new ones because the sensor is corrupted. I only get this screenshot and I'm forced out of the fingerprint menu. I have run diagnostics and fingerprint sensor is pretty much the only failure.

I'm backing up the phone and hoping a factory reset will fix it, but is there anything else I can do? Please and thanks

Edit 11/27: Samsung you guys need to fix this with a software update, I don't want to pay to get the sensor fixed if that is even the problem. I will just use face biometrics instead

image


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Mujibar
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Run a diagnostic under Device Care. It will let you know of any potential hardware issues.
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babajeeds
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I tried that, I get the same error. The fingerprint test cannot run. I editted the original post to add the note about diagnostics1763766894568.jpg
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Mujibar
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Sorry, I missed that you said you already tried that. I think you might need to have the device looked at by an authorized service center. Here's how you can find a location near you:

https://www.samsung.com/us/support/service/locations/
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realaud
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If the fingerprint test can't be run, I consider that's definitive proof there's something wrong with the hardware.


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Fleaa
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realaud
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Have you put in an error report?  Posting here is not putting in an error report and the developers/tech support will never see it. This is a peer-to-peer user help forum. You say the sensor has not been working since the 7.0 update and you can't perform a diagnostic but yet just waited around for Samsung to fix something they didn't know was broken.  That normally would indicate a hardware problem, not a software problem, and unique to your particular device.  However, if you don't want to take it to a repair center for an evaluation, having the developers look at your log with the submission of your error report will inform as to whether it's indeed a software issue or a hardware one.  Error reports are best sent within 15 minutes of encountering the error condition.  So, replicate the error and then send your report.

https://us.community.samsung.com/t5/Tips-Tricks/How-to-Send-Feedback/ba-p/3001692


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Matstechstudios
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Try booting in safe mode and try adding the fingerprint if that does not work then it is a weird coincidence that the sensor broke you can boot in safe mode by going to the power off screen and holding the power off button that is on the screen and then selecting safe mode

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