Fingerprint sensor issue - Huawei Mate 20 Pro Guides, News, & Discussion

If my phone is sitting on the desk and I pick it up to unlock, the fingerprint sensor will only detect my finger on the second press. Once I've got it in my hand and lock it, it will unlock every time. But if I put it back down and pick it up, it will only work on the second press. It happens every time.
Anyone else found this?

I tested few times but I couldn't reproduce your finding.
Maybe you have activated some of the movement control settings, on my phone I don't have any.

themissionimpossible said:
I tested few times but I couldn't reproduce your finding.
Maybe you have activated some of the movement control settings, on my phone I don't have any.
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Click to collapse
I haven't enabled anything as far as I know. I turn most things off I don't need, especially gesture related as I never use any of it. Perhaps it's faulty somehow. I guess now's a good time to get it replaced due to the hulkified display.

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Strange Proximity Sensor Behavior

There seem to be several proximity sensor threads but I've done a search and have not found anyone that is having this same problem.
When I make a phone call, my screen turns off right away. I can only get it to come on by pressing the power button or tilting the phone so that a bright light or glare is on the proximity sensor or light sensor. This is a pain. I use my power button to end calls but I have to disable that option. Otherwise, any time I need to use touch tones for an in-call menu, I hang up or spend a minute tilting my phone or holding it up to a light bulb. I know there are workarounds that I could be using but I am wondering if my proximity sensor or light sensor is malfunctioning or if it is a software issue.
Also, when using the visual voice mail app, my screen goes black but not off. I can still see the status bar. It happens as soon as I tap the play button and works just fine after my voice mail stops. This is likely unrelated but I can't be sure.
Thanks in advance to anyone that helps!
Running stock and unrooted with no physical damage or obstruction of sensors. I have tried a factory reset... twice.
I'm having a weird issue with mine as well. Mine is a little different though. If I need to make a call that requires to enter # prompts and as soon as I move the phone away from my face the keypad will start beeping on the other end so the prompts will always get invalid responses. While on the phone and I move the phone away from my face for any reason, the person on the other end will hear the beeping.
mokash34 said:
There seem to be several proximity sensor threads but I've done a search and have not found anyone that is having this same problem.
When I make a phone call, my screen turns off right away. I can only get it to come on by pressing the power button or tilting the phone so that a bright light or glare is on the proximity sensor or light sensor. This is a pain. I use my power button to end calls but I have to disable that option. Otherwise, any time I need to use touch tones for an in-call menu, I hang up or spend a minute tilting my phone or holding it up to a light bulb. I know there are workarounds that I could be using but I am wondering if my proximity sensor or light sensor is malfunctioning or if it is a software issue.
Also, when using the visual voice mail app, my screen goes black but not off. I can still see the status bar. It happens as soon as I tap the play button and works just fine after my voice mail stops. This is likely unrelated but I can't be sure.
Thanks in advance to anyone that helps!
Running stock and unrooted with no physical damage or obstruction of sensors. I have tried a factory reset... twice.
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It sounds like your issue is hardware related. Take it to a sprint repair store and have it exchanged.
mrwicked said:
I'm having a weird issue with mine as well. Mine is a little different though. If I need to make a call that requires to enter # prompts and as soon as I move the phone away from my face the keypad will start beeping on the other end so the prompts will always get invalid responses. While on the phone and I move the phone away from my face for any reason, the person on the other end will hear the beeping.
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Click to collapse
You issue also sounds hardware related. The touchscreen sounds like it is going out. It might be the dialer app but I doubt it. Speaking from experience of course.
I went to Sprint store yesterday and they gave me a replacement for mine.
insuusvenerati said:
It sounds like your issue is hardware related. Take it to a sprint repair store and have it exchanged.
You issue also sounds hardware related. The touchscreen sounds like it is going out. It might be the dialer app but I doubt it. Speaking from experience of course.
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Click to collapse
Thanks I will head to a store and follow up here for anyone else. Thanks again.
I would check the sensor settings and play around before trying the store. But if that doesnt work it prob is hardware issues

Black screen after call - growing tired of this phone

Does anyone else have this issue? It's really driving me crazy to the point where I feel like ditching the Nexus 6. It's not even every call, but it is enough to annoy me. Pull the phone away from my head and the screen wont wake up. All I can do is long hold power to force a reset. It's really annoying. I've tried the proximity fix for 5.1 but it still happens. I can't set "power to end call" because also sometimes the phone doesn't wake the screen when there is an incoming call so I have to press power to wake the screen to see who it is.
Does anyone have any idea how to get around this other than the two solutions above? This has happened on both my devices (Original and RMA) and I just can't take it any more.
I sounds like a faulty proximity sensor. And I've observed intermittent behavior like this on previous phones (but not my N6). You can test this with a number of apps. I've used "Sensor Box for Android", but there are several more. Prox sensor is located near the top LH corner. With the app open and on prox sensor, passing your hand over it should register on the app.
You are so active on this forum that I won't even ask about a screen protector....
The proximity sensor seems to work fine under all tests that I have done. I actually use Tasker to utilise the proximity sensor to set ringer volume based on whether it is activated or not (eg in my pocket, proximity sensor CLOSE, set ringer high).
Its not every call either and multiple Nexus 6 devices have had this issue for me too. Proximity sensor works in every test
That's weird. I've had no issues at all. I assume you have the issue on the stock ROM too.....
I suppose I'll have to test though I don't really want to run stock.
What about disabling Tasker and trying it out.
Happens with or without tasker. It's pretty much always done it since 5.1
There are known issues with the prox being flaky on this device. I just need to find a way to overcome this.
Remember, we need to separate problem solving from the idea of how we want our phone to look and perform. Once you've identified the root cause, you can then decide what steps you want to take to solve it.
*Sigh* Yes I know. But it's so intermittent I won't know if it solves it for a looooong time. It would be quicker to return to stock, sell it and buy something else
I've literally never ran stock on the nexus 6.
Like Camera indicated, I'd try removing the screen protector if you have one and see if it's better.
It's not a protector issue.
Let's assume I've done all the obvious things except flash stock
Edit. I'm going to try and use power button ends call. Just to see of its an active call that causes it.
Hopefully it will happen when I can take a log cat but inise the phone very rarely.
Try this app in the Playstore.
https://play.google.com/store/apps/details?id=com.vorlan.screenoncall.free
I had a similar issue where the screen would time out while I was on a call and wouldn't wake when I moved the phone away from my face. I had to hit power button to wake phone and enter pin just to end a call. I make/recieve over 100 calls per day and it was getting old til I found this app. Works perfectly every time.
Thanks but that's not the same issue. Mine will not wake at all. I have to force a reboot to get display
You might give the app a try just to see. It keeps the screen on during a call but the proximity sensor still shuts the screen off unless you are on speaker phone. It may not work, but worth a try to keep your N6!
I've seen the same thing with my N6, display goes black (randomly, not even related to a call) and the only thing I can do is reboot. Haven't wasted any time looking for a solution, 'cause I don't think there is an easy one and there is no way to know if something you try is even going to work! I just reboot and move on.
Just posting to let you know you are not crazy and there is someone else out there with the same problem!!!
I'm not sure what you mean. I've been recommended this app before but I don't like the idea of mybscreen being on.
What do you mean it keeps the screen on but proximity still shuts it off? .
Thanks for confirming
Basically it doesn't let the screen timeout. Proximity sensor still functions like normal.
I would try it and see.
If it helps good, if not no harm. It definitely fixed my issue, even if my issue wasn't exactly what you're experiencing.
Well power button end call didn't help. I don't think it is a proximity sensor issue. Let's hope it happens when I can get a logcat. Unlikely. Maybe a job for tasker.
I had this issue too. I eventually thought it was tied to UV, but then I installed all stock and didnt change anything and it still happened. Maybe a bug in lollipop.

P10 how disable wake-up by home button

How to disable the home button when the screen is locked? The screen now activates when you touch the home button (finger reader) - later phone can be unlock by PIN or finger, but how to disable screen wake up by this butto?. I would like to block this possibility so that the screen wakes up only by pressing the on / off button.
Your P10 does this?
I tried it on my P10 a second ago. My phone only vibrates when I tap the homebutton with a finger or part of my skin which isn't getting recognized by the phone. But the screen stays of.
Which version are you on? I'm on VTR-L29C432B162
i have VTR-L29C432B151, and a wanne disable it, because it is very annoying.
Dude, you really don't understand how fingerprint scanner with its features works...
Workaround: just don't tap on that area
Jannomag said:
Your P10 does this?
I tried it on my P10 a second ago. My phone only vibrates when I tap the homebutton with a finger or part of my skin which isn't getting recognized by the phone. But the screen stays of.
Which version are you on? I'm on VTR-L29C432B162
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When you deactivate the fingerprint reader to unlock your device(settings/fingerprint/screen unlock), then when you tap on the reader, when the device is locked, the screen turns on.
I personally use fingerprint to unlock my device, but have another complain and that is, when i want to check my lock screen for missed calls/recieved messages i have to take the device to my hand and push the on/off button.
would be great to have double tap to wake function.
AntoSVK said:
Workaround: just don't tap on that area
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You misunderstand. I'm having this same grievance as it's so easy to knock the scanner when moving the phone that the next movement then swipes to unlock it and the next thing you know you're opening apps and tapping stuff.
I don't give two hoots about fingerprint scanners as they are inherently insecure so I will never use mine. I'd like the ability to disable it completely so it doesn't even act as a button.
Silently said:
You misunderstand. I'm having this same grievance as it's so easy to knock the scanner when moving the phone that the next movement then swipes to unlock it and the next thing you know you're opening apps and tapping stuff.
I don't give two hoots about fingerprint scanners as they are inherently insecure so I will never use mine. I'd like the ability to disable it completely so it doesn't even act as a button.
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fingerprint is insecure? how does that?
DallasCZ said:
fingerprint is insecure? how does that?
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You're using a password that you carry on your person at all times, is always visible, and can't be changed. If someone steals your phone they just need to grab your hand and put it on the reader to have full access.
https://www.kaspersky.com/blog/fingerprints-sensors-security/10951/
Silently said:
You're using a password that you carry on your person at all times, is always visible, and can't be changed. If someone steals your phone they just need to grab your hand and put it on the reader to have full access.
https://www.kaspersky.com/blog/fingerprints-sensors-security/10951/
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Click to collapse
Do you really think that someone would steal your phone and your hand just to unlock your device? Ok maybe if you are a bilionaire or presdent of the united states...
The same i can say about unlock pins or gestures ..they need just to put you under drugs and you will tell them the code.
Same as with iris scanner, they just need your phone and your eye .
Too paranoic in my opinion. There is way higher probability that you would die in car accident or airplane accident than someone stelas your phone and your hand . 99% of stolen phones are stolen beacuse of value of the device, not because someone would spend hours to get into your device.
But anyway it is your opinion ...
DallasCZ said:
But anyway it is your opinion ...
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Indeed.
So, getting back on track, does anyone know a way to disable the fingerprint reader in its entirety? I suspect this may only be possible with a custom-ROM or at the very least root access.
Besides it makes no sense, I think there is no oficial way to completly deactivate the fingerprint reader.

Lift to wake stops working periodically

I just picked up an XZ2 for a steal. So far I really like the phone, but one thing has really been nagging me. The lift to wake functionality works pretty well most of the time, but occasionally, it will just stop working completely. It's like the phone goes to sleep and stops recognizing the sensors or something. It doesn't happen after sitting for a long time, either. It actually happens right after I've been using it. Today, the screen timed out and went black and no matter how much I shook the phone, put it in my pocket and took it out, etc., it never worked again until I hit the power button.
Before someone suggests just hitting the power button or fingerprint sensor: You're missing the point. I shouldn't have to. It's bad enough that Sony took tap-to-wake from us and never gave it back. But I expect this feature to work consistently. Really, you should rarely, if ever, have to hit the power button. A similar feature on the iPhone works without fail almost 100% of the time.
I'm just looking to see if anyone else has experienced this. The phone is fresh out of the box, has the latest build (51.1.A.4.225) and was set up manually, not restored from a cloud backup. Has anyone else seen this?
Oh yes, it is one of three really small, miniscule bugs I've got with my XZ2. In my case, the lift to wake only stops working a few times and after I wake the phone manually, it works the way it should work again. But it only happens in those rare times.
AlvinZahran98 said:
Oh yes, it is one of three really small, miniscule bugs I've got with my XZ2. In my case, the lift to wake only stops working a few times and after I wake the phone manually, it works the way it should work again. But it only happens in those rare times.
Click to expand...
Click to collapse
Thanks. Yeah, it's annoying. The inconsistency drives me crazy. It seems to have something to do with the screen timeout.
I wish they would just give us proper tap to wake back.
Sent from my H8266 using Tapatalk

Serious practical problem lock screen

Strange thing is happening recent to me...
Namely, while using headphones while talking on the phone, the unit gets unlocked while in pocket and problems arise with spontaneous keys getting activated.
If even cannot be explicitly locked by pressing the power button.
Have not found a solution to this problem, and it's strange why the proximity sensor does not work in pocket.
Cannot remember whether this was previously, or is it since last ROM upgrade.
Anyone having same problem?
tomsag said:
Strange thing is happening recent to me...
Namely, while using headphones while talking on the phone, the unit gets unlocked while in pocket and problems arise with spontaneous keys getting activated.
If even cannot be explicitly locked by pressing the power button.
Have not found a solution to this problem, and it's strange why the proximity sensor does not work in pocket.
Cannot remember whether this was previously, or is it since last ROM upgrade.
Anyone having same problem?
Click to expand...
Click to collapse
Yep I have the same thing... Today my pocket took 9599295 pictures and movies.. also when I'm a bit sweat my pocket dial random numbers. I've noticed that when screen is touched and disnt recognize fingerprint then whole lockscreen shows up and its easy way to random open dial or camera... Its rly anoying, because I dont want to hide phone screen outside of the skin. (Its easier to break screen if I hit something with my leg.)
Dunno why it doesnt use proximity sensor to recognize that phone is in the pocket like every other brand... :/
Do you have the double tap to wake up activated?
I had this problem a while ago and it was the double tap that played all kinds of tricks calling emergency and taking pictures in my pocket! Disable double tap to wake up screen and the problem goes away.
Disable the fingerprint icon on when the screen if off.
Gokh said:
Disable the fingerprint icon on when the screen if off.
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Click to collapse
Tried everything but the problem is eventually still there. Actually I've found a bug, namely the display will wake up once touched several times near the center of the fingerprint reader. Try it yourself.
Not nice - cannot avoid to happen it sometimes even if all options are disabled.
tomsag said:
Tried everything but the problem is eventually still there. Actually I've found a bug, namely the display will wake up once touched several times near the center of the fingerprint reader. Try it yourself.
Not nice - cannot avoid to happen it sometimes even if all options are disabled.
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Click to collapse
I didn't have this problem. If I try now and touch the part with the scanner, doesn’t have to be just the centre of the scanner, rapidly around ten times the lock screen will turn on, but nothing happens when I touch the shortcuts. Perhaps they are disabled, so the only thing that happens if the scanner is touched again is that the numpad to unlock with pin appears.
This is not good as it may severely affect battery life if it happens a lot. This clearly must be a bug!
gerhard_wa said:
I didn't have this problem. If I try now and touch the part with the scanner, doesn’t have to be just the centre of the scanner, rapidly around ten times the lock screen will turn on, but nothing happens when I touch the shortcuts. Perhaps they are disabled, so the only thing that happens if the scanner is touched again is that the numpad to unlock with pin appears.
This is not good as it may severely affect battery life if it happens a lot. This clearly must be a bug!
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Even worse, since it is happening all the time while on a call via BT and my phone is in the pocket. I am now thinking about to switch over to my old MI8...
Cannot understand why the keyboard is not disabled in the pocket. Seems so easy to do it but it's as it seems on.
tomsag said:
Even worse, since it is happening all the time while on a call via BT and my phone is in the pocket. I am now thinking about to switch over to my old MI8...
Cannot understand why the keyboard is not disabled in the pocket. Seems so easy to do it but it's as it seems on.
Click to expand...
Click to collapse
My only solution was to buy a flip case. At first, I disabled the fingerprint reader by removing all fingerprints and setting up face recognition, but this didn’t fix the problem you are talking about. I don’t really like flip cases, but the Nillkin QIN Smartcase is rather good.
So now I ‘m eagerly awaiting a fix from Xiaomi so I can strip the Mi9 again!
Gokh said:
Disable the fingerprint icon on when the screen if off.
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Click to collapse
Where can the fingerprint icon be disabled? Thank's.
j4dotcc said:
Where can the fingerprint icon be disabled? Thank's.
Click to expand...
Click to collapse
Disabling the fingerprint icon has no effect on the problem we are talking about here. The only way to make the problem go away is to remove all the stored fingerprints thus disabling the use of fingerprints all together. This will shut off the fingerprint sensor doing away with this problem in a crude way.
If you really are looking for a setting, please use the search function at the top of the settings.
gerhard_wa said:
Disabling the fingerprint icon has no effect on the problem we are talking about here. The only way to make the problem go away is to remove all the stored fingerprints thus disabling the use of fingerprints all together. This will shut off the fingerprint sensor doing away with this problem in a crude way.
If you really are looking for a setting, please use the search function at the top of the settings.
Click to expand...
Click to collapse
Thanks for the prompt reply. I don't have the problem and just wanted to know where I can disable the fingerprint icon. Thanks again.
New uppdate out that include Pocket Mode. MIUI-V10.2.27.0PFAEUXM EEA version.

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