Fingerprint sensor allows hack - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

Boy I had a nightmare .
The fingerprint sensor authorised my friend's unsaved fingerprint on my device.
This happened when automatically night mode got turned on... Reading mode to be honest.
Is this just me of any more of you folks.
Using a normal tempered glass.
Miui 10 raphaelin...
Update:
It's the screen protector

I have been using K20 pro from 2 months with and without a tampered glass, but I never faced such an issue.

I am using it without tempered glass, doesn't allow my unregistered fingers to unlock the phone. Night mode/reading mode doesn't allow to unlock either.

I have hydrogel below and a Nillkin tempered glass on top, double protection and it still doesn't allow other fingerprints to unlock, maybe he registered his fingerprints without you knowing?
Sent from my Redmi K20 Pro using Tapatalk

ishaqtkr said:
I have hydrogel below and a Nillkin tempered glass on top, double protection and it still doesn't allow other fingerprints to unlock, maybe he registered his fingerprints without you knowing?
Click to expand...
Click to collapse
This seems to be the possible explanation. Optical fingerprint scanners don't just unlock with unregistered prints.

lanisshrup said:
Boy I had a nightmare .
The fingerprint sensor authorised my friend's unsaved fingerprint on my device.
This happened when automatically night mode got turned on... Reading mode to be honest.
Is this just me of any more of you folks.
Using a normal tempered glass.
Miui 10 raphaelin...
Click to expand...
Click to collapse
Discard all the stored fingerprints and initiate a read of a new print from single or multiple fingers with the tempered glass on it.
Then try if you can repeat that fenomena with your friend's finger.

Trying again
Thanks folks... Let's see..
Would keep you posted.
Some Youtubers made a video of that.. Didn't understand the lingo though

lanisshrup said:
Trying again
Thanks folks... Let's see..
Would keep you posted.
Some Youtubers made a video of that.. Didn't understand the lingo though
Click to expand...
Click to collapse
Interesting,link to video?

Aimara said:
Interesting,link to video?
Click to expand...
Click to collapse

Useless sensors

lanisshrup said:
I tried a few combinations.
Perhaps it's nova launcher to blame.
Device admin was off for this and being used as double tap to lock.
Guess miui optimization security turned it off.
Tested locking via power button and then that was no problem.
Then re allowed nova launcher device admin lock.
Now working smooth.. would test further
Click to expand...
Click to collapse
Nopes still a failure...
Opens with other fingers... Ain't using this dangerous thing now

Maybe my device is faulty.

Yeah I'm recording a video ... posting

There you are.
This sucks

lanisshrup said:
Useless sensors
Click to expand...
Click to collapse
how to trigger this ? i dont understand what they are saying, i tried several times on mine k20 pro china set , cant open it , maybe your sensor is faulty ?

Aimara said:
how to trigger this ? i dont understand what they are saying, i tried several times on mine k20 pro china set , cant open it , maybe your sensor is faulty ?
Click to expand...
Click to collapse
Well I doubt this can be device specific.. yeah my sensor might be faulty.
Triggering is done by simply using any other unsaved finger to open the device.

I've used the phone without TG, and with TG... The phone doesn't even recognize my registered fingerprints.

plskillme said:
I've used the phone without TG, and with TG... The phone doesn't even recognize my registered fingerprints.
Click to expand...
Click to collapse
And opens on unauthorised fingerprints... I miss the good old fingerprint scanners ..
Back to pattern unlock

nakulp said:
This seems to be the possible explanation. Optical fingerprint scanners don't just unlock with unregistered prints.
Click to expand...
Click to collapse
You're forgetting the most logical explanation. His future self timetraveled back and unlocked the device.
On the real though, I've handed my phone out to many people to show off the in-display fingerprint reader and never had this issue.

It seems to be a simmilar error that is currently going around for the samsung galaxy 10.
https://www.theverge.com/2019/10/18...nition-patch-next-week-bug-biometric-security
The fingerprint scanner has just more information of a maybe "grainy" cheap screen protector than the needed fingerprint.
Maybe a cleanup of the screen protector and a reregristering of the fingerprints could help somewhat

Related

Phone calls

Hi, has anybody else experienced that their screen goes blank and doesn't come back on when on a call and what makes it worst is I can't hang up my phone after I'm done with my call. Basically I'm at the mercy of the other person hanging up when the conversation is done, the only way that I have resolved this problem is when I restart my phone. What causes this problem?
Do you have a tempered glass screen protector on?
Look to the left of the top speaker and you will see two sensors (proximity and ambient light). Is there anything covering these, such as a screen protector, skin, or case?
I do have a screen protector on the phone. Should I just remove it? I just find it strange that once I restart the phone that everything works as it should.
mr.pnutt said:
I do have a screen protector on the phone. Should I just remove it? I just find it strange that once I restart the phone that everything works as it should.
Click to expand...
Click to collapse
Because it doesn't check that sensor except when you're on a phone call.
mr.pnutt said:
I do have a screen protector on the phone. Should I just remove it?
Click to expand...
Click to collapse
When I bought my first smartphone, a Galazy S2, I bought an expensive (£10) screen protector. All it did was attract grease and fingerprints, so after a couple of months, after a sudden attack of common sense, I threw it away. The screen was suddenly always clean and smooth, and on every phone I've had since there has never been a single mark on any screen. Admittedly I do look after it - unlike colleagues who seem happy to literally throw their phones on to tables - and keep it always in an empty pocket with no coins or keys.
It seems very odd to me that we have incredibly tough glass on our phones (see the many people on Youtube trying to scratch their phones deliberately) and yet we feel the need to reduce their performance with pointless pieces of plastic...? Bizarre...
mr.pnutt said:
I do have a screen protector on the phone. Should I just remove it? I just find it strange that once I restart the phone that everything works as it should.
Click to expand...
Click to collapse
It sounds like your sensor maybe going. I have always kept a screen protector on my device and never had issues until I used a tempered glass one. The tempered glass was to thick to allow the proper amount of light in which kept the screen from coming on when a call came in or when on a call.
I would run a logcat and try to catch it happening. This will tell you just what is going on.
dahawthorne said:
When I bought my first smartphone, a Galazy S2, I bought an expensive (£10) screen protector. All it did was attract grease and fingerprints, so after a couple of months, after a sudden attack of common sense, I threw it away. The screen was suddenly always clean and smooth, and on every phone I've had since there has never been a single mark on any screen. Admittedly I do look after it - unlike colleagues who seem happy to literally throw their phones on to tables - and keep it always in an empty pocket with no coins or keys.
It seems very odd to me that we have incredibly tough glass on our phones (see the many people on Youtube trying to scratch their phones deliberately) and yet we feel the need to reduce their performance with pointless pieces of plastic...? Bizarre...
Click to expand...
Click to collapse
I just find it to be strange that I have put screen protectors on all of my phone's even some with the sensors but this is the only phone that does this.
dahawthorne said:
When I bought my first smartphone, a Galazy S2, I bought an expensive (£10) screen protector. All it did was attract grease and fingerprints, so after a couple of months, after a sudden attack of common sense, I threw it away. The screen was suddenly always clean and smooth, and on every phone I've had since there has never been a single mark on any screen. Admittedly I do look after it - unlike colleagues who seem happy to literally throw their phones on to tables - and keep it always in an empty pocket with no coins or keys.
It seems very odd to me that we have incredibly tough glass on our phones (see the many people on Youtube trying to scratch their phones deliberately) and yet we feel the need to reduce their performance with pointless pieces of plastic...? Bizarre...
Click to expand...
Click to collapse
I just find it to be strange that I have put screen protectors on all of my phone's even some with the sensors but this is the only phone that does this.
mr.pnutt said:
I just find it to be strange that I have put screen protectors on all of my phone's even some with the sensors but this is the only phone that does this.
Click to expand...
Click to collapse
First before you get ahead of yourself. Find out if it is the screen protector. It is a cheap fix if it works and cheap to replace if it doesnt.
zelendel said:
First before you get ahead of yourself. Find out if it is the screen protector. It is a cheap fix if it works and cheap to replace if it doesnt.
Click to expand...
Click to collapse
How am I about to get ahead of myself? Like I stated, I find it strange that this is the ONLY PHONE that I have ever had this type of problem with.
mr.pnutt said:
How am I about to get ahead of myself? Like I stated, I find it strange that this is the ONLY PHONE that I have ever had this type of problem with.
Click to expand...
Click to collapse
Because you are not sure if that is even the problem. The only time I had this issue was with a tempered glass one. This is a known common issue. I never had this issue with a normal one.
zelendel said:
Because you are not sure if that is even the problem. The only time I had this issue was with a tempered glass one. This is a known common issue. I never had this issue with a normal one.
Click to expand...
Click to collapse
First off, I've never used a tempered glass screen protector. And I have multiple devices with the same sensors but, this is still the ONLY DEVICE that has this problem.
mr.pnutt said:
First off, I've never used a tempered glass screen protector. And I have multiple devices with the same sensors but, this is still the ONLY DEVICE that has this problem.
Click to expand...
Click to collapse
Have you bothered to pull a log at as I advised? This will tell you. Have you tested it without the screen protector as I also advised?
Just because it is the same sensor (which I doubt) doesn't mean it is programmed the same way.
zelendel said:
Have you bothered to pull a log at as I advised? This will tell you. Have you tested it without the screen protector as I also advised?
Just because it is the same sensor (which I doubt) doesn't mean it is programmed the same way.
Click to expand...
Click to collapse
Yes I have. And what I've noticed is that if I erase my call log history or restart my phone, everything goes back to normal.
mr.pnutt said:
Yes I have. And what I've noticed is that if I erase my call log history or restart my phone, everything goes back to normal.
Click to expand...
Click to collapse
Ok then next will be to run the logcat. This will tell you why it is failing.
zelendel said:
Ok then next will be to run the logcat. This will tell you why it is failing.
Click to expand...
Click to collapse
I am running a logcat now and so far I have not experienced the same issue. I'll see what happens this weekend.
I had the same problem some weeks ago WITHOUT a screen protector but it never happened again. Could be the sensor which fails sometimes or a software related error. Are you using the stock phone application and stock kernel?
GioBozza said:
I had the same problem some weeks ago WITHOUT a screen protector but it never happened again. Could be the sensor which fails sometimes or a software related error. Are you using the stock phone application and stock kernel?
Click to expand...
Click to collapse
Yes, everything is stock, not rooted and, my bootloader is still factory locked.
mr.pnutt said:
Yes, everything is stock, not rooted and, my bootloader is still factory locked.
Click to expand...
Click to collapse
If it's a Phone app bug the only thing you can do is deleting its cache and/or reflashing the factory image. If this doesn't solve it, I would say it's an hardware fault, but I'm still prone to think it's software related.

P30 Pro Lock Screen Not Secure???

Please you guys try this on your phone? It can't just be my girlfriends? Read the description for details on the circumstances
https://youtu.be/Sj2Gs-TKpVg
No but I now have a nice clean screen, so thanks for that
Was your girlfriend near screen phone?
Remember, face id is activated when fod is working
Not with me. I tried several times but except clean screen i didnt get anything with that
maverickmarc said:
Please you guys try this on your phone? It can't just be my girlfriends? Read the description for details on the circumstances
https://youtu.be/Sj2Gs-TKpVg
Click to expand...
Click to collapse
Nope, dont work
She was no where near the phone.. I'm so confused, I keep doing it over and over, it works for me.
She does have a tempered glass screen protector, but the first time it unlocked while wiping the screen before I installed it. I'm not crazy lol.
It also doesn't always work like in the video, that just happened to be the video that made it look the easiest. 2-3 fingers on the wipe, slide up and down on the screen.
You have a tempered glass installed?
Can't possibly just be this phone. Keep trying lol
Did you have a tempered glass installed?
If I had a good secondary camera, I'd take a longer more detailed video
maverickmarc said:
She was no where near the phone.. I'm so confused, I keep doing it over and over, it works for me.
She does have a tempered glass screen protector, but the first time it unlocked while wiping the screen before I installed it. I'm not crazy lol.
It also doesn't always work like in the video, that just happened to be the video that made it look the easiest. 2-3 fingers on the wipe, slide up and down on the screen.
Click to expand...
Click to collapse
Face unlock is mistaking you for her, turn Face unlock off and try again
Either that or you are managing to enter the PIN with the cloth
Neither, I ain't an amateur, my face doesn't unlock it, and I'm not "accidentally" entering a 6 digit pin that I don't even know
I think it may be the screen protector, similar issue that the S10 had.. I'm pretty sure I did it without it, but I'm not about to tear it off to see, it's the last one in the pack

Glass screen protector that works WELL with the fingerprint sensor.

Hello, I recently bought a glass screen protector, it fits well and everything. It's one of the UV gel applicated ones. It stated in the description that it worked with the fingerprint sensor, but at least half the time it will say no match. Maybe even more than half the time. It's really bad. Before the protector was one I was amazed at how well the fingerprint sensor worked. I had an in display sensor on my last phone, OnePlus 7pro, and it almost no comparison as to how fast and accurate it was.
I already set the sensitivity to high for the touchscreen and I have also redone the fingerprint learning process a few times.
So now I feel torn. I don't want to live without a screen protector. I feel they really can save you from breaking your screen when you drop your phone as the protector will crack instead by absorbing the force instead.
So has anyone found one that works really well?
Whitestonedome makes perfect on my end
Tonyy1206 said:
Whitestonedome makes perfect on my end
Click to expand...
Click to collapse
Yup, a friend and I have the Dome and they work perfectly fine.
Tonyy1206 said:
Whitestonedome makes perfect on my end
Click to expand...
Click to collapse
How? I've installed two of them and although looks fine, have to press SUPER hard to even get it to read...and even then it reads it like 25% of the time is all.
If I have face unlock turned on it gives the appearance that it's working fine, try it in a dark room so you know it's not using the face. Doesn't work worth crap....
LiquidHonesty said:
How? I've installed two of them and although looks fine, have to press SUPER hard to even get it to read...and even then it reads it like 25% of the time is all.
If I have face unlock turned on it gives the appearance that it's working fine, try it in a dark room so you know it's not using the face. Doesn't work worth crap....
Click to expand...
Click to collapse
The domes I installed are fine as well.
Whitestone dome work perfectly with fingerprint...never missed a single time so far in 2 months
papubhai said:
Whitestone dome work perfectly with fingerprint...never missed a single time so far in 2 months
Click to expand...
Click to collapse
HOW??? Seriously, there's all kinds of reports with people having FPS issues, how do some people not have issues? Did they change the glue or something? It's crap, ANFilm is better with the weight but not great. Even with sensitivity turned up............
WSD - Press REALLY hard and pray it open after 5-10 seconds
AnFilm - Press REALLY hard and pray it opens after 1-3 seconds
Non-Glass film - touch and it unlocks instantly.....
LiquidHonesty said:
HOW??? Seriously, there's all kinds of reports with people having FPS issues, how do some people not have issues? Did they change the glue or something? It's crap, ANFilm is better with the weight but not great. Even with sensitivity turned up............
WSD - Press REALLY hard and pray it open after 5-10 seconds
AnFilm - Press REALLY hard and pray it opens after 1-3 seconds
Non-Glass film - touch and it unlocks instantly.....
Click to expand...
Click to collapse
I didn't even turn up the sensitivity and it works great.
LiquidHonesty said:
HOW??? Seriously, there's all kinds of reports with people having FPS issues, how do some people not have issues? Did they change the glue or something? It's crap, ANFilm is better with the weight but not great. Even with sensitivity turned up............
WSD - Press REALLY hard and pray it open after 5-10 seconds
AnFilm - Press REALLY hard and pray it opens after 1-3 seconds
Non-Glass film - touch and it unlocks instantly.....
Click to expand...
Click to collapse
I completely understand, had similar results as you! I feel like people troll!
DanDroidOS said:
I completely understand, had similar results as you! I feel like people troll!
Click to expand...
Click to collapse
I could post a video to show you I'm not "trolling". I have no reason to lie about it working or not.
airmaxx23 said:
I could post a video to show you I'm not "trolling". I have no reason to lie about it working or not.
Click to expand...
Click to collapse
lol I was just saying it feels like your being trolled when you know you are doing something correct and getting different results as someone else! Glad it's working for you!
With the Whitestone screen protector I had to add the same finger to all of the available slots to ensure fairly reliable unlocking. It still sometimes fails if my fingertip is very dry.
GOTO screen protector from the Tmobile store works 90% of the time, but I bought it at an expensive price of $45. You have to wait for 2 days for the screen protector fingerprint sensor area to work properly.
Brapabout said:
With the Whitestone screen protector I had to add the same finger to all of the available slots to ensure fairly reliable unlocking. It still sometimes fails if my fingertip is very dry.
Click to expand...
Click to collapse
Same over here, even when registering a new FP entry, I need to press hard, or no go.
Interestingly if I breathe over the finger (adding moisture) before touching the screen, it recognises like 95% of the time. Although I workaround, it's annoying to say the least, not to mention what someone thinks if they see you doing it.
Sent from my SM-N9860 using Tapatalk
One thing that may be worth mentioning is that when setting my fingerprints up my finger/thumb is turned to the same angle that it is when I unlock the phone. When you hold the phone and unlock it with your thumb it isn't straight up and down, it's turn to the side, when you scan your thumb it should be in the same position. Same thing goes for scanning your finger.
Do you really need a fingerprint sensor?
Time has proven 2 things to me about device passwords; the only real security is physical possession of the device, and you will at some point lose the password access due to a hardware failure (including data corruption).
Total lockout passwords are a bad plan unless you're dealing with national or sensitive company etc data.
All I use is double tap on... and never set a bios password on any of my PCs, ever.
Encryption for critical data drives is even worse.
Total access loss vs an imaginary false sense of security.
Think hard about that before you get locked out.
Don't get too clever for your own good...
thinpaduser said:
GOTO screen protector from the Tmobile store works 90% of the time, but I bought it at an expensive price of $45. You have to wait for 2 days for the screen protector fingerprint sensor area to work properly.
Click to expand...
Click to collapse
That's the worst screen protector I have every seen in my life. Tmobile should be sued for selling it.
To add I have whitedome as well and I had to reregister a couple times but works well now
airmaxx23 said:
I could post a video to show you I'm not "trolling". I have no reason to lie about it working or not.
Click to expand...
Click to collapse
You don't, no, we just find it hard to believe because it's no where near that for the majority of us. Tape over the front camera to rule out face unlock and barely touch the screen. Does it unlock with your FPS or do you have to press HARD to get it to register? Don't see how it magically works for you when it doesn't for 99% of everyone else.
---------- Post added at 08:56 PM ---------- Previous post was at 08:49 PM ----------
blackhawk said:
Do you really need a fingerprint sensor?
Time has proven 2 things to me about device passwords; the only real security is physical possession of the device, and you will at some point lose the password access due to a hardware failure (including data corruption).
Total lockout passwords are a bad plan unless you're dealing with national or sensitive company etc data.
All I use is double tap on... and never set a bios password on any of my PCs, ever.
Encryption for critical data drives is even worse.
Total access loss vs an imaginary false sense of security.
Think hard about that before you get locked out.
Don't get too clever for your own good...
Click to expand...
Click to collapse
HUH? I doubt hardly anyone I know has ever had the not be able to get to their phone due to "hardware failure". And what "total loss?" That's why it backs up to the cloud (where you have 2FA) and why there's a backup passcode if it can't read your fingerprint. Plus a lot of us work for companies that require passcodes on the phone to sync corporate email......so FPS is faster than the darn code every time.
Why would you even risk losing your phone with no lock on it, the person could cause issues so quickly on that phone. I see no downside....my phone locks me out and I can't even enter the backup passcode, I can get a new phone and restore from the cloud. My phone gets lost with no code the user sees all my pics, access my google pay, posts as me on FB/Twitter, texts my wife, etc.
Please, don't try to tell people they shouldn't use phone security. SMH
LiquidHonesty said:
You don't, no, we just find it hard to believe because it's no where near that for the majority of us. Tape over the front camera to rule out face unlock and barely touch the screen. Does it unlock with your FPS or do you have to press HARD to get it to register? Don't see how it magically works for you when it doesn't for 99% of everyone else.
Click to expand...
Click to collapse
I've tested it with the phone not facing me and it works fine, I don't have to press hard, just place my finger on the screen. A friend of mine has the Dome as well and has zero issues.

Question Fingerprint Sensor problems

I keep having issues with my fingerprint sensor... constant "fingerprint doesn't match" or "Press Harder" or "... cover the whole area..."
This is with a whitestone dome on the phone...
Anyone else having this issue?
I have a galaxy s21 ultra being used with a case by a company called you maker. It originally came with a plastic sticker that was protected and covered. That circular plastic sticker allows the finger to be read using the ultrasonic technology while being in a case. There's another technology that uses light to make almost a 2d image of your print. Try without the case and see if it works. Also sorry about you inconvenience.
well... there's no way i'm gonna take the whitestone dome off since its cured... just wondering if other peeps with WD tempered screens have the same issue with the fingerprint sensor
Had that issue with my S10+ as well. Try removing fingerprints then adding them again - assuming you didn't register after installing the screen protector. Another thing I had done was register the same fingerprint multiple times.
snobrdinrtiste said:
well... there's no way i'm gonna take the whitestone dome off since its cured... just wondering if other peeps with WD tempered screens have the same issue with the fingerprint sensor
Click to expand...
Click to collapse
I have the WD screen protector on my S21 Ultra and I'm having issues with my fingerprint sensor also. I'm very disappointed because for the price, I expected it to be fully compatible with the fingerprint sensor.
The Samsung ultra comes with x2 screen protectors people rip the first one off or finger print sensor will not work i found this out the device has a second screen protector so no need to worry
snobrdinrtiste said:
I keep having issues with my fingerprint sensor... constant "fingerprint doesn't match" or "Press Harder" or "... cover the whole area..."
This is with a whitestone dome on the phone...
Anyone else having this issue?
Click to expand...
Click to collapse
Forgive me if this is a stupid question, but did you take off the factory installed screen protector that comes with the S21 Ultra? Not the one that you take off when you first remove it from the box (sort of a dust protector) but there is an actual screen protector there - very hard to see unless you look very close - if you did not remove that, then that is most likely your problem. If you did remove that before installing then I am not sure why you are having issues. Either way - best of luck my friend.
jutley said:
The Samsung ultra comes with x2 screen protectors people rip the first one off or finger print sensor will not work i found this out the device has a second screen protector so no need to worry
Click to expand...
Click to collapse
Only exynos variants come with screen protector, My U and U1 arrived without it. So just need to ensure finger print is re-registered. Did not use whitestone dome due to experiences with note 9 glass but the spigen glass is working well with finger prints once registered after application
Geekser said:
Forgive me if this is a stupid question, but did you take off the factory installed screen protector that comes with the S21 Ultra? Not the one that you take off when you first remove it from the box (sort of a dust protector) but there is an actual screen protector there - very hard to see unless you look very close - if you did not remove that, then that is most likely your problem. If you did remove that before installing then I am not sure why you are having issues. Either way - best of luck my friend.
Click to expand...
Click to collapse
Yes, I removed the original film that was on there. I also went to the "Display" menu and increased the touch sensitivity option. In addition to that, I registered the fingerprint of my thumb 3 times. I can't seem to unlock my phone in the 1st attempt. It usually takes multiple attempts for it unlock. From a visual point of view, the screen protector installed perfectly. I just wish it was fully compatible with the fingerprint sensor.
galaxyultra said:
Yes, I removed the original film that was on there. I also went to the "Display" menu and increased the touch sensitivity option. In addition to that, I registered the fingerprint of my thumb 3 times. I can't seem to unlock my phone in the 1st attempt. It usually takes multiple attempts for it unlock. From a visual point of view, the screen protector installed perfectly. I just wish it was fully compatible with the fingerprint sensor.
Click to expand...
Click to collapse
this is the exact same thing i'm experiencing!!! So annoying! I wrote to Whitestonedome and asked for a refund. Plus the bottom of the whitestonedome's glass is starting to peel ... even though it was cured and everything was fine for four straight days.
And no, the phone did not come with a pre-installed screen protector.
For what it's worth, the Fingerprint sensor works awesome for me. I have not added a glass screen protector and probably won't. For now, I am simply relying on the one installed by Samsung at the Factory - but I also have another Film Protector from AM-FILM that I will use if necessary. Very happy with how fast the FP sensor is - much better than on my previous phones....
Have both 21 ultra and whitestone dome glass installed. I have noticed that my finger slids a little not being use to glass as I tried for the life of me to use glass with my s10+. Couldn't get whitestone to work so I got zagg fusion glass. I have also noticed that if you have dry ass fingers, like after washing, it won't recognize your print. Try with lotion!
If only Samsung ditched the curved display for a flat panel, then we can buy "normal" screen protectors at fair prices.
The curve screen is a little annoying but also satisfying also
I have problems with original screen protector sometimes, registered finger only 1 time but I get same errors might just peel it off but don't know will it help any
I haven't removed the screen protector that comes with the phone from factory (not the one that you peel when you take it off the box... No issues with fingerprint sensor.. I had a note 20 ultra and I did the stupid mistake of removing the one from factory and putting one from amazon that had the circle for fingerprint.. I had to readd all prints and the worst thing is that it would miss more than hit. When I got my s21 ultra I was smart enough to keep the protective film that came with it. Other than that, I would suggest custom made with hydrogel (something I have seen where I live) which is flexile yet durable and works great with fingerprints.
I installed a generic £4 UV glass screen protector from ebay. Initially I had the exact same issue. But now it works for me. The trick I realised is to remove the old finger prints and re-register them. You will need to register the same finger 2 or 3 times and you will need to use a little more pressure when using the fingerprint scanner to unlock. It is still not as reliable as it would be without a screen protector and you will get a few misses but it gets the job done. I prefer using face unlock most of the time and use the fingerprint scanner only to make payments, access the banking app etc and for that it works fine I just need to press into the screen gently vs just placing my finger on the scanner as I would otherwise.
I don't understand how people claim that screen covers work perfectly well with with this phone's fingerprint sensors. i have tried AMfilm glass, and two soft ones by unique me and... even after the extra sensitivity was turned on, the fingers would fail most of the time. since you only get 5 tries before it locks.... so annoying... are the people that write those ratings all bs?? btw.. first experience with an ultrasonic sensor and it kinda blows..... am i out of luck? never had a phone without a screen cover ..... sigh
johnp357 said:
I don't understand how people claim that screen covers work perfectly well with with this phone's fingerprint sensors. i have tried AMfilm glass, and two soft ones by unique me and... even after the extra sensitivity was turned on, the fingers would fail most of the time. since you only get 5 tries before it locks.... so annoying... are the people that write those ratings all bs?? btw.. first experience with an ultrasonic sensor and it kinda blows..... am i out of luck? never had a phone without a screen cover ..... sigh
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Click to collapse
If you don't mind not having glass, a zagg will work for sure as I had it on my S10+. Currently running whitestone and if my fingers are just washed, it won't work. But if I rub them together or add lotion to my hands, it reads it with no problems. I have also added my print a few times in different variations like the side of my thumb and the tip of my thumb to make sure it can read any part of my thumb
johnp357 said:
I don't understand how people claim that screen covers work perfectly well with with this phone's fingerprint sensors. i have tried AMfilm glass, and two soft ones by unique me and... even after the extra sensitivity was turned on, the fingers would fail most of the time. since you only get 5 tries before it locks.... so annoying... are the people that write those ratings all bs?? btw.. first experience with an ultrasonic sensor and it kinda blows..... am i out of luck? never had a phone without a screen cover ..... sigh
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If you tried 2 soft ones and those didnt work, thats a you problem

Question Asus Zenfone 8 Screen protector?

Hi everyone,
I just bought a RhinoShield impact protection for my zenfone 8. However, as far as I know, all devices or most of the flagship Android devices now have a "pre-installed" plastic screen protector. Now, I'm trying to scratch off mine to remove it before I put my impact protection however I can't seem to see that there's one. I'm afraid that there's none and scratch the main screen itself.
Can anyone confirm if there's a "pre-installed" plastic screen protector for our Zenfone 8 devices before I put my sharp knife and tools to try and remove it.
azter007 said:
Can anyone confirm if there's a "pre-installed" plastic screen protector for our Zenfone 8 devices before I put my sharp knife and tools to try and remove it.
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No, there isn't.
dron39 said:
No, there isn't.
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aw sheesh. thanks for confirming, I'll apply the impact protection now then.
Just wanted to add that you should brace yourself for pretty awful performance of the fingerprint scanner after installing the screen protector. I basically had to stop using it. I really miss the times of fingerprint scanners on power buttons
funstorm said:
Just wanted to add that you should brace yourself for pretty awful performance of the fingerprint scanner after installing the screen protector. I basically had to stop using it. I really miss the times of fingerprint scanners on power buttons
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Mine is fine with protector
@Blumi511
what exactly do you have screen protector?
daniel91m said:
@Blumi511
what exactly do you have screen protector?
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I'm using these
Savvies 6X Schutzfolie kompatibel mit Asus ZenFone 8 Displayschutz-Folie Ultra-transparent https://www.amazon.de/dp/B0958338LZ/ref=cm_sw_r_apan_glt_i_8ENAHAWMDM7N65HZDPAZ
They fit quite okay (a bit too short in width, but that's okay with me)
It is foil, not glass, so the fingerprint sensor may be working properly. I would like to have a glass that does not affect the sensitivity of the sensor ...

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