Develop Bugs

[Q] Fingerprint Scanner problem

New to Samsung. I am running stock. After registering my fingerprint and unlocking the tab one time using the fingerprint scanner it has not worked since. I have tried to use it to unlock the tab at least 10 times and it fails each time. Every time it tells me to"make sure I am using the full pad". I try rescanning several times and get the same reply. I have done a search and could find a answer to my problem?

Slowly swipe over the scanner. Works reliably for me.

pibach said:
Slowly swipe over the scanner. Works reliably for me.
Click to expand...
Click to collapse
The 'mistake' I made when first setting it up was to try to carefully scan the same way when registering my fingerprint.
When registering swipe your finger all kinds of different ways. The full pad, more just the tip of your finger. Rolled to one side and then to the other. Swipe faster and slower, finger tipped at different angles, etc.
Now it should work very reliably.

ezas said:
The 'mistake' I made when first setting it up was to try to carefully scan the same way when registering my fingerprint.
When registering swipe your finger all kinds of different ways. The full pad, more just the tip of your finger. Rolled to one side and then to the other. Swipe faster and slower, finger tipped at different angles, etc.
Now it should work very reliably.
Click to expand...
Click to collapse
Exactly what i did that made mine a tonne more reliable.

fingerprint not detecting sometimes

OP3 finger print is really fast but sometimes I just can't it to get it work, once it doesn't work it'll not work at all and then I have to unlock using Pattern
Does anyone have this issue?

I found that if on lockscreen there is a lock symbol it won't open by fingerprint. If there is a fingerprint symbol then it works

Not to worry!! While you are registering a finger..... u have to completely register each corner of the finger print.....only then it works from however u put ur finger on it!! I experienced it many times too!!!

Just registry 1 finger 2 times...thats all

But it works always except when there's a lock icon on lock screen.
If there's a fingerprint scanner symbol it works 100%

it wont work with wet finger, wipe your hand

When you register a finger, you have to put all kinds of different parts of the fingertip on different parts of the fingerprint scanner, so that the scanner "knows" your finger in all possible positions. That is what the lenghty procedure is for.

Yeah I've done all kinds of way, rolled it, left, right, top, down.
Does anyone know why there's a lock symbol sometimes on lock screen instead of fingerprint symbol
Sent from my LG-D802 using XDA Free mobile app

Fingerprint Problem May Be?
Hi,
Sometimes my fingerprint is not recognized by fingerprint scanner. I have registered two fingerprints for the same finger. Still sometimes it does not recognize.
Is it because still some area is left which is not recognized? When it is not recognized and i put my center of finger on scanner, it recognizes.
Is it fine? Also is it fine if it doesn't recognizes if only a part of sensor is touched by finger. I am using fingerprint sensor first time so little bit skeptical.
I think i am testing it too much just to confirm if it is fine and somehow able to make it fail at some area of my finger. :silly:
Please help.

Please help me guys.

Wash your hands
Sent from my ONEPLUS A3000 using XDA-Developers mobile app

brickedvice said:
Wash your hands
Sent from my ONEPLUS A3000 using XDA-Developers mobile app
Click to expand...
Click to collapse
Obviously, my hand are clean and i am testing with clean hands

It requires pin after a reboot, then you should be able to use the fingerprint reader until the next reboot.

marc87us said:
It requires pin after a reboot, then you should be able to use the fingerprint reader until the next reboot.
Click to expand...
Click to collapse
Its because of security or you can use require pin on boot and it will take bit long for booting

But what about the lock symbol and finger print symbol on the lockscreen, has no one observed this yet?
I'm unable to attach pictures as in XDA website to attach images it is asking me url

chandidas said:
OP3 finger print is really fast but sometimes I just can't it to get it work, once it doesn't work it'll not work at all and then I have to unlock using Pattern
Does anyone have this issue?
Click to expand...
Click to collapse
Been using OP3 FP scanner from last one week. I have 4 Fingers registered it works without any problem. Clean you FPS

I've been having an issue where I would take the phone out of my pocket and the fingerprint scanner wouldn't even vibrate when I touched it. After trying several settings I started putting my phone in my pocket with the screen facing out instead of towards my leg. I think the fingerprint scanner would get activated while rubbing up against my thigh. So far I can tell it's working fine. Everytime I take it out of my pocket it recognizes my finger right away. Also I noticed less battery drain.

chandidas said:
But what about the lock symbol and finger print symbol on the lockscreen, has no one observed this yet?
I'm unable to attach pictures as in XDA website to attach images it is asking me url
Click to expand...
Click to collapse
I saw it. Often when i unlock using fingerprint the phone gets locked automatically 1 second after unlocking, than the symbol is a lock and i have to use the pattern. Then there is a text something like "For improvement of safety, a pattern is required" really annoying

Geliras said:
I saw it. Often when i unlock using fingerprint the phone gets locked automatically 1 second after unlocking, than the symbol is a lock and i have to use the pattern. Then there is a text something like "For improvement of safety, a pattern is required" really annoying
Click to expand...
Click to collapse
Thank God, I was starting to wonder if it's only in my phone. I think doze maybe doing this. Is there any way to contact oneplus team on this.?

I started a chat yesterday but the girl with even worse english than mine told me to do a hard reset and wipe everything. Havnt done it cause i dont think it will help

Unlock w/ Home button without fingerprint?

Pretty much what the title says. I'm using resurrection remix rom right now. Is there somewhere an option to be able to wake the device with a press of the home button without using fingerprint lock? Or actually any lock at all.
Sent from my ONEPLUS A3003 using XDA-Developers mobile app

+1

1+

With no security feature? Why?
Fingerprint unlock is super fast and does what you want.
What's the usage case here?
Sent from my ONEPLUS A3000 using Tapatalk

EP2008 said:
With no security feature? Why?
Fingerprint unlock is super fast and does what you want.
What's the usage case here?
Sent from my ONEPLUS A3000 using Tapatalk
Click to expand...
Click to collapse
In some cases fingerprint just doesn't work. After doing heavy manual labor without cloves the fingerprints kind of lose they edge and one has to put his finger many times on the sensor. That's only one of the reasons that popped up to my mind from my personal experiences. I had a bug or something in OOS 3.2.6 that it unlocked the phone with any finger or skin contact. It was a foolproof and very simple way to open up the phone but I think it would be useless without a wallet case or something similar.

Squabl said:
In some cases fingerprint just doesn't work. After doing heavy manual labor without cloves the fingerprints kind of lose they edge and one has to put his finger many times on the sensor. That's only one of the reasons that popped up to my mind from my personal experiences. I had a bug or something in OOS 3.2.6 that it unlocked the phone with any finger or skin contact. It was a foolproof and very simple way to open up the phone but I think it would be useless without a wallet case or something similar.
Click to expand...
Click to collapse
Try adding the same fingerprint multiple times. This should make it more accurate.
Does double tap the screen to wake work for you or does it have to be the home button?
Sent from my ONEPLUS A3000 using Tapatalk

EP2008 said:
Try adding the same fingerprint multiple times. This should make it more accurate.
Does double tap the screen to wake work for you or does it have to be the home button?
Sent from my ONEPLUS A3000 using Tapatalk
Click to expand...
Click to collapse
Double tap to wake would probably be enough. I've already added my finger multiple times but still having issues with it sometimes. At the moment I'm using Xposed Additions to unlock the screen. First I double tap to wake the phone to lock screen and then open it by long pressing the recent button if fingerprint is not recognized.
I realized after reading your post that I can wake up and unlock the device with double tap by removing security all together. Thanks for pointing me to right direction.

EP2008 said:
With no security feature? Why?
Fingerprint unlock is super fast and does what you want.
What's the usage case here?
Sent from my ONEPLUS A3000 using Tapatalk
Click to expand...
Click to collapse
Well, first of all, i dont really like locking my phone, as it's mostly a waste of time. No one gets my phone without me knowing it really, so there's no problem with "security" and having to unlock it is just one extra step especially when i hand my device to someone. Now fingerprints are fast indeed, but i'd have to add quite a few of my fingers as right thumb/pointer might sometimes just not be available for whatever reason and even then sometimes my hands may be dirty because im working, or something, and i'll use a knuckle or something like that.
Now to be honest double tap to wake has been growing on me, but still i'd like the single press home button unlock. It just seems easier and more elegant.

Is the Fingerprint Scanner perminantly ON?

Hi Guys,
I'm thinking about buying this phone for a friend and need to understand how the fingerprint scanner works.
On my One Plus 3, the scanner is ON all the time which makes it awesome, (but probably eats battery.) :victory:
On my Galaxy Tab S2, you have to press the scanner to turn it on first, which makes the whole process much worse.
Is the scanner on the P2 always ON, (like the One Plus 3,) or does it require a press to wake it up? (like on Samsung devices.)
Thanks in advance. :highfive:

The scanner is always on.. you don't need to wake the phone to use it.. the battery drain is minimal
Sent from my Lenovo P2a42 using Tapatalk

Uibon said:
The scanner is always on.. you don't need to wake the phone to use it.. the battery drain is minimal
Sent from my Lenovo P2a42 using Tapatalk
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Click to collapse
Thanks Uibon. :highfive:
Is it a physical button? i.e. presses in, or is it just purely capacitive?
My Samsung also has an issue where if you lock the screen using an app, (Power Toggles,) you can't unlock the phone with your fingerprint. Any idea if the P2 suffers the same issue?

It's both. The fingerprint sensor is capacitive and works by just placing one's finger on it. There are also many gestures that work on the capacitive sensor like tap to go back long press to view recent apps. The button is also physical pressing it brings you to home screen and long press brings up Google assistant
Sent from my Lenovo P2a42 using Tapatalk

Uibon said:
It's both. The fingerprint sensor is capacitive and works by just placing one's finger on it. There are also many gestures that work on the capacitive sensor like tap to go back long press to view recent apps. The button is also physical pressing it brings you to home screen and long press brings up Google assistant
Sent from my Lenovo P2a42 using Tapatalk
Click to expand...
Click to collapse
Ok Uibon,
So to unlock the phone, do you just place your finger on the sensor (without pressing it down,) or do you have to press it down as well? I ask this as on my Tab S2, having to press down also results in many incorrect reads.
Its a pity Lenovo didn't put a lock screen gesture in the fingerprint scanner like One Plus. It by far the best system I've ever used. :angel:

It works like the fingerprint on the OnePlus.. just place the finger to make it work no pressing the button necessary.
Sent from my Lenovo P2a42 using Tapatalk

Uibon said:
It works like the fingerprint on the OnePlus.. just place the finger to make it work no pressing the button necessary.
Sent from my Lenovo P2a42 using Tapatalk
Click to expand...
Click to collapse
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.

Masteryates said:
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.
Click to expand...
Click to collapse
Just tried screen lock widget and it requires pin to unlock after using it. Finger does not work.

I am using nova prime and double tap to sleep and i can wake from finger print sensor iff you use timeout lockscreen method which means after you double tap the screen to lock the it screen goes black instantlly but the actual full screen lock engages after 30sec allowing the phone to screen to be locked through its own system hence the fingerprint wake works normal. I am not aware of other launchers that have this but nova prime has it.

Masteryates said:
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.
Click to expand...
Click to collapse
That's an Android security limitation and all phones do that I believe. I think some apps can "trick" the phone by turning the screen off and let the timeout do the locking but I'm not sure.

If you have root access then they'll work. Else they won't. It's a security feature and uses device admin rights to lock the phone. Which means the device admin should unlock it by the most secure way. That's​ pin password or pattern.
It's not device specific and hence it's nothing to blame Lenovo

dannejanne said:
That's an Android security limitation and all phones do that I believe. I think some apps can "trick" the phone by turning the screen off and let the timeout do the locking but I'm not sure.
Click to expand...
Click to collapse
You are correct dannejanne. Some OEM's have realised how stupid it is and have sorted it out.
On the One Plus 3, you can securely unlock the phone and relock all with one finger while your phone is on your desk. You can do this better and faster than any other phone. As it's something you do so many times a day, it's time for the other OEM's to blatantly copy this.

Any solution for fast unlocking

Hi there
I just switched from a Asus Zenfone 5z which has a dedicated fingerprint sensor. So one touch and you ard on home screen.
Now the fingerprint sensor on Note 10 + is slow, also the fact that one has to first click the side key and then put the finger on the screen and seemingly wait for 2 sec.
It is nowhere near as fast as the zenfone 5z.
Have you guys got any better solution or idea to unlock it fast.
Thank you for your time.

NEERO said:
Hi there
I just switched from a Asus Zenfone 5z which has a dedicated fingerprint sensor. So one touch and you ard on home screen.
Now the fingerprint sensor on Note 10 + is slow, also the fact that one has to first click the side key and then put the finger on the screen and seemingly wait for 2 sec.
It is nowhere near as fast as the zenfone 5z.
Have you guys got any better solution or idea to unlock it fast.
Thank you for your time.
Click to expand...
Click to collapse
You don't exactly have to turn on phone to use fingerprint reader.
If you know the position of fingerprint reader then putting your finger there would turn on and unlock phone. But that would be if you can get it on right position. If not it would tell you and then you can readjust as it will then show you.
Other option would be to have always on display and would show position of fingerprint reader.
You can also double tap to wake up phone as well. Then go through same process.
Hope some others could add more but these has been what I've found out with my usage.
Sent from my SM-N975U1 using Tapatalk

Enable the gesture "lift to wake"
Enable "always on display" so that you always see the finger print location.
What ever finger you use most for the finger print, scan it for 2 spots out of the 4 available. So I have my left thumb for 1, right pointer for 2, and right Thumb for 3 and 4. My right thumb is now always solidly fast.

DaPoets said:
Enable the gesture "lift to wake"
Enable "always on display" so that you always see the finger print location.
What ever finger you use most for the finger print, scan it for 2 spots out of the 4 available. So I have my left thumb for 1, right pointer for 2, and right Thumb for 3 and 4. My right thumb is now always solidly fast.
Click to expand...
Click to collapse
1. Please clarify : Do you mean to register the same right thumb twice to increase accuracy of the right thumb, as that is what I mostly use.
2. Currently always on display is set as tap to show.
Does making it always show have any significant reduction in battery.
And that you for your time, you are very helpfull.

lmanlo said:
You don't exactly have to turn on phone to use fingerprint reader.
If you know the position of fingerprint reader then putting your finger there would turn on and unlock phone. But that would be if you can get it on right position. If not it would tell you and then you can readjust as it will then show you.
Other option would be to have always on display and would show position of fingerprint reader.
You can also double tap to wake up phone as well. Then go through same process.
Hope some others could add more but these has been what I've found out with my usage.
Click to expand...
Click to collapse
Didn't even know that I had to just press the locked screen.
Also thank you for recommending the lift to wake up gesture, has increased the speed a lot.
Still wondering if I can use NFC to keep it unlocked as it is always kept on a phone stand.
Many thanks for your time.

NEERO said:
Didn't even know that I had to just press the locked screen.
Also thank you for recommending the lift to wake up gesture, has increased the speed a lot.
Still wondering if I can use NFC to keep it unlocked as it is always kept on a phone stand.
Many thanks for your time.
Click to expand...
Click to collapse
You can use Smart lock Trusted places under settings-lock screen to keep phone unlocked. You just have to turn on phone then just swipe to go into phone without password but it will lock after a certain timeframe if not used.

lmanlo said:
You can use Smart lock Trusted places under settings-lock screen to keep phone unlocked. You just have to turn on phone then just swipe to go into phone without password but it will lock after a certain timeframe if not used.
Click to expand...
Click to collapse
I do know about Smart Lock but prefer not to use it as keeping the GPS on does feed the location data to other apps as well, not something I prefer to give away.
Thank you for the recommendation though.

You can register your face as well. It works really fast with lift to wake up gesture.

Smart lock can be used without GPS on, it uses a trusted wifi network to keep the phone unlocked or, if you have one a bluetooth speaker...
Don't need GPS at all...

Another vote for smart lock but with a wearable like a wear os watch. I pretty much never have to unlock my phone.

In case helpful to someone else, I enabled the increase touch sensitivity setting under Display settings and the fingerprint seems to work much quicker as I don't have to press down harder.

NEERO said:
1. Please clarify : Do you mean to register the same right thumb twice to increase accuracy of the right thumb, as that is what I mostly use.
2. Currently always on display is set as tap to show.
Does making it always show have any significant reduction in battery.
And that you for your time, you are very helpfull.
Click to expand...
Click to collapse
#1 YES
#2 It's a 4300mah battery, the AOD doesn't even dent it.
Happy to help!

I have AOD set to always on, and it is super easy to unlock.
I pick up the phone, hold my thumb on the sensor and it is unlocked instantly. I don't see how it could get any better than that!

ultramag69 said:
Smart lock can be used without GPS on, it uses a trusted wifi network to keep the phone unlocked or, if you have one a bluetooth speaker...
Don't need GPS at all...
Click to expand...
Click to collapse
Hi, I did turn it on after reading your post, enabled my location with GPS off and wifi connected but it doesn't work.
Is there anything special I need to do in this regard.
Thanks

sansnil said:
In case helpful to someone else, I enabled the increase touch sensitivity setting under Display settings and the fingerprint seems to work much quicker as I don't have to press down harder.
Click to expand...
Click to collapse
Yes I turned ut on as well as the phone comes with a factory applied screen protector and that is what that setting seems to be for. Should have been on by default.