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Sony Xperia Z5 features with 5.2 inches 1080 x 1920 pixels display and is equipped with Qualcomm Snapdragon 810 processor alongside 3GB RAM and 23 MP rear camera.

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Sometimes device does not detect fingerprint hardware

I have fingerprint unlocking activated on my Sony Xperia z5, but sometimes when I press the power button and place my finger there, it shows on the screen "fingerprint hardware not detected". Sometimes It fixes after I spam the power button a few times. Other times that doesn't work , so I try to restart the phone and when the phone boots up, the fingerprint option in the security menu completely disappears! And obviously I can't use my fingerprint to unlock the phone anymore, till I restart the phone again to get it working, but sometimes the "fingerprint hardware not detected" thingy would still pop up. Is this really a hardware issue or is this just a software bug? And is there an actual way to fix this easily? Thanks for reading this and please reply :D

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I have this same problem with the Xperia 1 I'm currently using the password so it's more secure and would use fingerprint and passcode if I could but can't cos of the fingerprint not being able to scan my finger even though I've used all the available fingerprint saves for my right thumb and still can't unlock it so turned it off because was just making me !#^&@@ off because the basic thing that every other phone has doesn't work on a £800 phone which blows my mind so every other phone company are attempting folded phones, Face ID, infinity displays etc..... And this phone which is more than 90% of phones can't handle fingerprint. I'm so frustrated please let me know if u find some sort of fix I've tried everything I even contacted Sony they just said that there may be a software fix down the line to fix the problem but just got a software update yesterday and I feel like it honestly made it worse. So please let me know would be greatly appreciated.

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1 Answer

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I only managed to fix this by doing a restore from the xperia mobile app which the phone installs on a computer. Unfortunately I had to start from scratch, and it still seems that after some time the fingerprint scanner will stop working, again. Seems to be some kind of firmware issue Sony has, perhaps a system cache not clearing properly, which causes it to bug out over time.

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I have the same issue with my Xperia XZ Premium. My guess is that since the firmware has an option to turn off the fingerprint scanner for the US market, that this is accidentally tripped under some combination of OS setup, or app combination. One option is to use what US customers are doing to activate the fingerprint scanner - see https://www.youtube.com/watch?v=gKKRznRW... - I haven't tried this yet.

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I don't live in the U.S. so my phone actually should have the fingerprint scanner function still enabled lol. I brought to the Sony customer service while i still had the warranty and they fixed it for me. It's been close to over a year now and i didn't have any problem after they fixed it. I also bought a Sony Xperia XZ Premium since 1st of July last year, but i didn't encounter any fingerprint scanner issue though.

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