Database Users

Fingerprint sensor stopped working

My Atrix's fingerprint sensor stopped working all of a sudden. Anybody experienced this?

Happend to me and restarting my phone seemed to be the trick
Sent from my MB860 using XDA Premium App

I have read about ppl having problems on the 83 FW thread. Are you on 57 or 83?

Same problem with mine today. Version 1.83

I've been on 1.8.3 for four days so far, and the fingerprint sensor seems to be working normally.
Perhaps you can go back and redo your fingerprint calibrations.

I'm on 4.1.57. Never rooted. I tried to re calibrate my finger prints and it the phone would not even sense it. bummer.

Same happens to me every so often. And restarting phone did fix it.
Sent from my MB860 using XDA App

Just happened to me for the first time ever. Just updated to 83 so i guess thats why.

I had the same thing happen to me today. Running .83. Rebooted the phone and it went back to normal

1.26 1.57 1.83 have the same problem.
Just config it again.

You guys tweaking your memory management?
Sent from my Motorola Olympus

If you happen to have your finger on the sensor when the phone is booting, the sensor gets confused and doesn't work.
Reboot and keep your finger off the sensor until the unlock screen and you should be fine.

fingerprint scanner going out for me once a day, reboot fixes it. for now i just shut it off. any permanent fixes or is it because of the latest 1.8 update?

Mine did the same thing after updating it to .83 and a reboot fixed it. One thing I noted was this happened whn the battery is below 20%. I initially thot it would come back after I a recharge, apparently I was wrong and had to restart. It is so annoying. Also, I am experiencing more battery drain after updating.
Sent from my MB860 using XDA App

I've had it refuse to see my finger from time to time, fewer times after each OTA update. I'm not happy about the freezes but this is the only phone with a finger reader, when it fails...pretend it is any other phone, use the passcode. I expect Moto to get this solved sooner rather than later because this is supposed to be a big feature for corporate sales and the attack on Blackberry's native security functions.
Whether it is a memory conflict (let's face it, Android apps are often ill-behaved and there's no one really doing qc testing on them) or an Atrix flaw...no choice but to wait either way.

Has anyone found a permanent fix for this? The Atrix is the first smartphone that my wife has owned and shes losing confidence in it. This is just one more thing that is on the list of problems shes had. My Atrix works fine, but her fingerprint reader stops reading once or twice per day and she has to reboot each time to get it working again.

I've had the same problem since 1.8.3--somebody suggested in another thread that it might be related to Titanium backup keeping settings from pre-update and trying to apply them?
I have to be honest that the fix suggestions were kind of over my head and I've just gone into settings and changed to a pattern instead of the fingerprint reader to avoid it.

My wifes Atrix keeps losing the fingerprint reader still. Maybe 2 times a day. Hers is not rooted. I took a closer look yesterday and looked at her running apps. She had a lot that were running and taking up a lot of memory. Could this be the problem? If she doest exit apps and just hits the home button will this cause the Atrix to use up its memory and lose the fingerprint function?

JohnnyDanger said:
My wifes Atrix keeps losing the fingerprint reader still. Maybe 2 times a day. Hers is not rooted. I took a closer look yesterday and looked at her running apps. She had a lot that were running and taking up a lot of memory. Could this be the problem? If she doest exit apps and just hits the home button will this cause the Atrix to use up its memory and lose the fingerprint function?
Click to expand...
Click to collapse
I have no idea if that could be related/the issue, but I guess it's worth a try, maybe install an app to auto-kill other apps. Something like advanced task killer, I used to use it (and it works well, no particular reason for uninstalling it) but now I just use juice defender and my battery life has increased a significant amount (I keep it on the default setting - using free version)

Every 2-3 days it happens and I have to reboot. When it fails, it doesn't scan your finger at all..

[Q] fingerprint sensor going bad?

I've read a couple threads about the fingerprint sensor not working but they all seem to be resolved by a reboot and mine is continuously sh*tty. its not even that i lose calibration and it doesnt permit me to unlock my phone, its that it appears to lack to recognize that im swiping my finger. it always feels laggy and it happens differently each time.
sometimes it works but is really laggy to recognize it, then it progresses to the point where i have to swipe a couple times to get it to even try to authenticate my finger. other times it never does anything. not even deny my finger, just pretends im not doing it.
im rooted, unlocked, running neutrino 2.5 EE now, but the problem started back when i was running gingerblur and then in alien rom too. i have latest romracers recovery. i follow full clean install procedures when i install rom. i really think my fp scanner is simply quitting on me. anyone with similar problems/solutions?

VM0824 said:
I've read a couple threads about the fingerprint sensor not working but they all seem to be resolved by a reboot and mine is continuously sh*tty. its not even that i lose calibration and it doesnt permit me to unlock my phone, its that it appears to lack to recognize that im swiping my finger. it always feels laggy and it happens differently each time.
sometimes it works but is really laggy to recognize it, then it progresses to the point where i have to swipe a couple times to get it to even try to authenticate my finger. other times it never does anything. not even deny my finger, just pretends im not doing it.
im rooted, unlocked, running neutrino 2.5 EE now, but the problem started back when i was running gingerblur and then in alien rom too. i have latest romracers recovery. i follow full clean install procedures when i install rom. i really think my fp scanner is simply quitting on me. anyone with similar problems/solutions?
Click to expand...
Click to collapse
i cant even get it to work at all i got this phone as a Grade A phone from buy/sell shops and it obviosly has barely been used. tried motoblur roms and after a few eractic swipes it shows failed and on Neutrino doesnt work at all.

is there someone specifically that the fingerprint firmware or whatever can be flashed. im really infamiliar with the file system and where these things would be stored but its getting progressively worse

using any rom firmware that supports the fingerprint scanner works all the time.
Of how you described the issue, it would more likely be a hardware issue, dust, dirt or even water residue.
Try some cleaning and puffing even with cold air hair dryer!

I have 3 Atrixes. One works once a while, but not lately; it runs 2.3.4 stock. I can't really say it's a hardware problem since it works some times, but it's really unpredictable. The other two Atrixes always works, and they run 2.3.4/2.3.6 stock.

recordman said:
I have 3 Atrixes. One works once a while, but not lately; it runs 2.3.4 stock. I can't really say it's a hardware problem since it works some times, but it's really unpredictable. The other two Atrixes always works, and they run 2.3.4/2.3.6 stock.
Click to expand...
Click to collapse
,,, which confirms the theory of fp button harware fault or issues... clean and puff, obviously after removing back cover

There are a couple other threads regarding this issue. I'm betting on faulty hardware, too, as this seems to be somewhat common. My first Atrix had this issue after only about 6 months, so I replaced it myself, which wasn't difficult.
The one sold at CellularDr dot com works just fine. (Would post a link, but... noob... ) It's $22.95 right now. If you're on AT&T, you might have luck taking the phone in and just getting a replacement, but you probably should flash a fruit cake first.

Note 4 freezes and restarts issue! Ultimate thread

Hello everyone,
I've had my note 4 over two years now and out of nowhere problems started happening after second MM update, model SM-N910F was freezing and restarting and sometimes was not able to boot normally and got mmc read fail.
I'm reading a lot about this problem in other forums and here, so hope someone could help about this issue.
No Success:
I tried anything from removing sd card, removing sim card, changing the battery, resetting the device, cleaning the cache, flashing the room through odin, flashing the rom with pit file and doing a re partition (Didn't tried Nand erase).
Success:
The only way that I was able to fix the freeze issue was by installing app called Wake Lock and enabling PARTIAL_WAKE_LOCK.
But using Wake Lock has its disadvantages. First of all you need to run the app all times which its not practical and second it wipes your battery because it keeps device and processor awake.
Please join this thread anyone who has similar issues with the aim to fix or bring the phone to an usable state again.

I also purchased my GN4 about 2 years ago and just recently got this error. This is really fishy. Wouldn't be surprised if it was Samsung trying to screw over all the root users and get us to upgrade to newer models.

The Sponge said:
I also purchased my GN4 about 2 years ago and just recently got this error. This is really fishy. Wouldn't be surprised if it was Samsung trying to screw over all the root users and get us to upgrade to newer models.
Click to expand...
Click to collapse
Did you tried Wake Lock if it works? Which model of GN4 do you have ?

shpeendi said:
Did you tried Wake Lock if it works? Which model of GN4 do you have ?
Click to expand...
Click to collapse
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:

The Sponge said:
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:
Click to expand...
Click to collapse
I really don't think it's an hardware issue but even if so, why this started to happen immediately after the update and why it only happens when the device goes to sleep or when we power on the device.
I also noticed the change on bootloader fonts and interface after the update. I'm suspecting that the problem is there.
Does any one has any thoughts about this?

It's a hardware issue. It's a bad nand issue in fact. You can find Reddit posts a mile long about it.
Anyways it will slowly get worse over time. Had to replace the main-board in my SM-N910W myself.

ciscostud said:
It's a hardware issue. It's a bad nand issue in fact. You can find Reddit posts a mile long about it.
Anyways it will slowly get worse over time. Had to replace the main-board in my SM-N910W myself.
Click to expand...
Click to collapse
Is there any reason at all why it is happening I mean for the nand issue. I don't like the answer that is motherboard fault and we should replace it, which probably means replacing the phone. Is there anyone who can see deeper into the motherboard to find the issue. I also insist that this started to happen immediately after the second MM update.
I still have an IPhone 3G from 2008 and never changed anything on it. Isn't that ironic ?

shpeendi said:
Is there any reason at all why it is happening I mean for the nand issue. I don't like the answer that is motherboard fault and we should replace it, which probably means replacing the phone. Is there anyone who can see deeper into the motherboard to find the issue. I also insist that this started to happen immediately after the second MM update.
I still have an IPhone 3G from 2008 and never changed anything on it. Isn't that ironic ?
Click to expand...
Click to collapse
It was a Bad batch of nand chip that started to go bad after a year or two. Note 4s started to drop like flies before April.
I think your in the 1st stage of Loss and Grief. 1st stage is denial.

If thats so than Samsung should repair our phones under warranty and not tell us we have to pay for the repair coz we installed custom roms.

The Sponge said:
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:
Click to expand...
Click to collapse
same issue here, exactly as described above...
any way to push Samsung to admit bad batch and fix it for us with no charge?

golden_m said:
same issue here, exactly as described above...
any way to push Samsung to admit bad batch and fix it for us with no charge?
Click to expand...
Click to collapse
I've already swaped a few main-boards. Ive even put a international exynos n910c main-board in a broken canadian snapdragon note 4 and its works perfect.
If anyone needs help just pm me.

ciscostud said:
I've already swaped a few main-boards. Ive even put a international exynos n910c main-board in a broken canadian snapdragon note 4 and its works perfect.
If anyone needs help just pm me.
Click to expand...
Click to collapse
I would be more interested in understanding how come so many Note 4 devices started acting up around same time mark...

This is definitely a hardware problem with the motherboard. Mine started giving the same symptoms 2 weeks after the 6.01 upgrade. Wakelock made it stable but after Samsung replaced the motherboard it is so much faster and no issues at all. I wonder if this is a faulty NAND issue whether the 6.01 upgrade and the way it manages memory could have triggered it. Certainly strange but it need Samsung to fix it.

I am also having same problem.
I was using custom rom and it was working fine without any lag or freeze suddenly one day my Note fall from bed to ground and since then it is not working properly i thought its the ROM so i reverted back to stock MM rom flashed via odin.
Reset everything erased everything but the problem remains same.
At present i am on stock with hardly any apps just FB and whatsapp.
But my device is so slow and keep lagging and sometimes it becomes very hot and restart itself.
I dont know what to do now. i m on 910 G snapdragon.

anasrizvi said:
I am also having same problem.
I was using custom rom and it was working fine without any lag or freeze suddenly one day my Note fall from bed to ground and since then it is not working properly i thought its the ROM so i reverted back to stock MM rom flashed via odin.
Reset everything erased everything but the problem remains same.
At present i am on stock with hardly any apps just FB and whatsapp.
But my device is so slow and keep lagging and sometimes it becomes very hot and restart itself.
I dont know what to do now. i m on 910 G snapdragon.
Click to expand...
Click to collapse
Sorry to hear that, as for now jut install wake lock and enable partial_wake_lock so you can use your device until it fails completely

Mmm. I was thinking to root my phone (4month old still under warranty ) i think i changed my mind after reading this ?. Thank you guy's for the warning
Sent from my SM-N910G using Tapatalk

Same issues, I downloaded the wake lock and so far so good.

I have the same issue also guys and it started a week after updating to Marshmallow.
Phone worked perfectly fine for 2 years prior to this. So I highly doubt its a hardware issue and more likely a software/firmware problem.
Phone seems to have issues whenever the screen is asleep (hence why the wake lock app seems to help with this problem although not a proper solution)
I'm hoping Samsumg can release a patch fix for this as I truly love my Note 4 and would like to keep it for some time yet.

have anybody tried going back to Lollipop?

golden_m said:
have anybody tried going back to Lollipop?
Click to expand...
Click to collapse
I was thinking about that! but I saw on other threads people downgrading with no success.

Fingerprint (again)

Hi,
I know this has been discussed many times, but I have something more to share regarding this, and maybe it can help anyone find a solution.
My X820 arrived last Friday, bought from Geekbuying. It had Indian 19s ROM, although it might be slightly modified by the shop.
Fingerprint was working well, but I wanted a better and more optimized ROM, so I flashed TWRP and got Small EUI. The worst thing is that I forgot one important step (yes, backup) and flashed the ROM right away.
Fingerprint kept working, but got worse. On Indian 19s, it unlocked the screen or apps very quickly, but on Small EUI it took it 1 or 2 seconds, so on Sunday morning I tried the calibration option under settings. That's the moment the fingerprint scanner stopped working. I spent some time on Sunday, and most of Monday trying different ROMS, but nothing worked. The sensor would not react at all, and would not let me add fingers.
Yesterday, I found a thread, on a OnePlus 2 forum, where people described a similar issue on that phone, and the way they got the sensor to work again: they drained the battery down to 0%, to the point when the phone would shut down by itself. Then they charged the phone again, and the sensor came back to life.
I tried that (I'm now on Cuoco92's 93c ROM), and after turning the phone on again, the sensor seemed to keep failing, but there was a difference. Before that, it wouldn't react at all, but this time, a message instructed me to keep my finger on the sensor for a longer time and to try again. This message was not appearing before.
I left the phone alone for the night, as I use it as an alarm clock, and in the morning I tried again, and it worked. I was able to register fingers and the sensor began working as usual, and unlocked the screen almost instantly.
But now,. two hours later, it is dead again. I've noticed it doesn't unlock the screen. I've just tried to remove the fingers I had registered earlier and see if I can add them again, but it doesn't work. This time, there's no message that instructs me to keep my finger on the sensor for a longer time, or to try again.
Well, I definitely haven't solved the issue, but I may have found something. Maybe others with dead sensors can try this solution and report back.
To drain the battery, I used this app: Your Battery Drainer
P.S.: BTW, I decided to try draining the battery because I remembered that when first I got the phone, the battery was empty. I almost freaked out when I tried to turn it on for the first time, as it wouldn't turn on, but it turned out to be that the battery was empty. After I left the phone charging for a while, it turned on normally.

I also just got my phone today 6gb RAM, 64gb UFS2.0.
Fingerprint very fast with 19s ROM.
I think I will stick with this ROM forever.

kkcheong said:
I also just got my phone today 6gb RAM, 64gb UFS2.0.
Fingerprint very fast with 19s ROM.
I think I will stick with this ROM forever.
Click to expand...
Click to collapse
You should, that was my mistake (I think) besides the LeEco software, and maybe fp hardware, not being too good. I just flashed the stock Indian 19s ROM again and the sensor is not working. I'm now downloading the Chinese 16s version, which others reported helped them revive their sensors. If the Chinese ROM doesn't work, I'll flash the Indian ROM again and try draining the battery in the evening, as I did yesterday.

jman0 said:
You should, that was my mistake (I think) besides the LeEco software, and maybe fp hardware, not being too good. I just flashed the stock Indian 19s ROM again and the sensor is not working. I'm now downloading the Chinese 16s version, which others reported helped them revive their sensors. If the Chinese ROM doesn't work, I'll flash the Indian ROM again and try draining the battery in the evening, as I did yesterday.
Click to expand...
Click to collapse
Good investigative work. I wish you good luck and will be reading this thread until you get it working.
I am quite happy to get this for USD186 for current x820 version even though without headphone.
---------- Post added at 10:15 AM ---------- Previous post was at 10:12 AM ----------
jman0 said:
My X820 arrived last Friday, bought from Geekbuying. It had Indian 19s ROM, although it might be slightly modified by the shop.
Click to expand...
Click to collapse
How do you know 19s is modified by the shop?

Actually I just got the phone. I will report back if it does in 7 days. Haha.

kkcheong said:
Good investigative work. I wish you good luck and will be reading this thread until you get it working.
I am quite happy to get this for USD186 for current x820 version even though without headphone.
---------- Post added at 10:15 AM ---------- Previous post was at 10:12 AM ----------
How do you know 19s is modified by the shop?
Click to expand...
Click to collapse
I don't know, maybe not. Anyway, I'm on the Indian 19s again and the fingerprint sensor is not working. If I have the time, I'll try draining the battery again this evening, and will report back tomorrow

jman0 said:
I don't know, maybe not. Anyway, I'm on the Indian 19s again and the fingerprint sensor is not working. If I have the time, I'll try draining the battery again this evening, and will report back tomorrow
Click to expand...
Click to collapse
Will wait for your result . 19s is actually badly optimized. I got 99k in Antutu.

I try every method with roms with apps but fingerprint newer works.
today i read this thread, i try now to drain battery with this app and i cant believe fingerprint start work.
But how long fingerprint will work.

Is there a possibility quick charge 3.0 heat kill the fingerprint sensor? Did you enable quick charge in the menu? Mine one still disabled and I am now worry to turn it on.
sina5566 said:
I try every method with roms with apps but fingerprint newer works.
today i read this thread, i try now to drain battery with this app and i cant believe fingerprint start work.
But how long fingerprint will work.
Click to expand...
Click to collapse

Just try to flash the CN Firmware S16 not the whole Rom

kkcheong said:
Is there a possibility quick charge 3.0 heat kill the fingerprint sensor? Did you enable quick charge in the menu? Mine one still disabled and I am now worry to turn it on.
Click to expand...
Click to collapse
That might be it. Today my sensor is not working, after draining the battery, but last night, when I charged the phone again, I did it with the fast charger. When I have the time, I'll try again with a pc or just disabling fast charging. Maybe you have a point there. Nice one.

Blubber120 said:
Just try to flash the CN Firmware S16 not the whole Rom
Click to expand...
Click to collapse
You mean the modem files, don't you? That was also one of my next steps, but first I'll try draining the battery again and not using quick charge afterwards. When I first got the phone with an empty battery, fast charging was not enabled, so it took the phone ages to charge, but the fp sensor worked. I think we may be close to a solution for everyone, and something LeEco should know. Maybe they can implement an slower fast charge which doesn't interfere with the fp sensor.
Anyway, fp sensor was not my main reason for purchasing this phone, so it's not that high on my priority list.

sina5566 said:
I try every method with roms with apps but fingerprint newer works.
today i read this thread, i try now to drain battery with this app and i cant believe fingerprint start work.
But how long fingerprint will work.
Click to expand...
Click to collapse
As another user suggested, disable fast charging, if you have it enabled, and see if fp sensor keeps working afterwards. It's good to know this method worked for you, too

Well, after flashing the Indian 19s ROM and draining the battery, nothing changed, but it could still have something to do with fast charging. Although I had it disabled, when I plugged the phone in, using LeEco's original charger, it charged the phone fast, rather than slow, so I think that maybe it didn't work because of that. I'll repeat the process again, this time using an old regular slow charger.
Did anyone else tried? Did you succeed?

jman0 said:
Well, after flashing the Indian 19s ROM and draining the battery, nothing changed, but it could still have something to do with fast charging. Although I had it disabled, when I plugged the phone in, using LeEco's original charger, it charged the phone fast, rather than slow, so I think that maybe it didn't work because of that. I'll repeat the process again, this time using an old regular slow charger.
Did anyone else tried? Did you succeed?
Click to expand...
Click to collapse
I scared that quick charge heat already kill the finger print. I mean hardware is dead.
But I still support support experiment to fix the fingerprint.

I think the FP problem has to do with HEAT. The FP failed to work when I was on holiday in Florida a few weeks ago. When I returned to the cool Toronto ,Canada, it is back to normal - works most of the time.

[email protected] said:
I think the FP problem has to do with HEAT. The FP failed to work when I was on holiday in Florida a few weeks ago. When I returned to the cool Toronto ,Canada, it is back to normal - works most of the time.
Click to expand...
Click to collapse
Fast charge generates a lot of heat, that's why it's our main suspect right now

Did you flash 23s modem? not the rom, only the modem and after the update of modem clean install of the rom ?

I have tried.. draining all battery from 25% to 0% and smartphone Switch off and after i charged almost 50% without fast charge and tourn on but unfortunatly fp still dont work

Listen guys, I hate to burst your bubble, but I have to... For starters, there are MANY people in the forums flashing all sorts of ROMs and different things, and their fingerprint readers still work. I can say the same thing for Quick Charge 3.0, everybody uses it, so I highly doubt that either of these things are causing the hardware failure.
Also, remember that OnePlus uses Dash charge and all heat is relegated to the charger and not smartphone.
I own two X829's that I bought from Banggood for $196 each a few months ago, and the fingerprint readers still work after countless flashing and charging, and believe me the phone has gotten incredibly hot at times too.
Early on though, I thought that my fingerprint reader had died because it stopped working on when I moved to the Nougat ROMs and later I found out that I needed a more recent modem for the fingerprint reader to work (23S or 419D), but what I have done in a panic was contact Banggood and I told them that my fingerprint reader had died on both my phones. I told them that I had already troubleshooted and consulted the forums. I told them that it was a common defect. I made a YouTube video for them showing the problem. They told me that I could return it to them to China and that they would refund me, but I told them that it cost too much to ship to China and that the last time I returned something to them it got lost in the mail. They then said that I could take the phones to a local repair shop and that they would refund me the cost of the repair, they said that the most they could refund me was $116, so I made a fake invoice for $116 and send it to them because I had bought two fingerprint readers from AliExpress for $7 each and wanted to repair them myself.
In the end I never needed the fingerprint readers because I was wrong and sold them on eBay, and Banggood refunded me the $116 for the so called repair, so in the end I only paid $82 for my Le Max 2. Hope this helps!

Fingerprint problem

Hi guy's.
I've had the 6t for several months and the only thing I'm not happy with is the fingerprint. What I've noticed is that when I put in a fingerprint it works fine until I start using Face unlock. After that I have to re-erase and pass the fingerprint because it almost never works. Does anyone have a similar problem?
Rom. 9.0.11

I haven't enabled Face Unlock but I can say that over time the finger print reader DOES get better, and continues to learn to deliver faster reads. Based on strong performance of the FP reader (better than my work-provided iPhone 6), I don't need to use anything else.

Frankenscript said:
I haven't enabled Face Unlock but I can say that over time the finger print reader DOES get better, and continues to learn to deliver faster reads. Based on strong performance of the FP reader (better than my work-provided iPhone 6), I don't need to use anything else.
Click to expand...
Click to collapse
Same thing, I disabled face unlock immediately, no point securing your phone with a fingerprint when a good picture will get you through most face unlock software. But when I first got the phone I was very disappointed with the fp sensor. Now it's very rare I have to try again, and it's normally because there's something on my finger while I'm at work.

I've been disappointed in the sensor as well.
I bought this used and it had a tempered screen protector.
I took that off thinking that was the issue.
How long did it take for you guys for it to get better?
I'm also disappointed that the custom ROMs don't have it working yet, but I understand why.

exhibitA said:
I've been disappointed in the sensor as well.
I bought this used and it had a tempered screen protector.
I took that off thinking that was the issue.
How long did it take for you guys for it to get better?
I'm also disappointed that the custom ROMs don't have it working yet, but I understand why.
Click to expand...
Click to collapse
Did you registered your fingerprints again after removing the the screen protector? I've read somewhere on the phone that changing the glass cover may affect accuracy and registering your fingerprints after changing it is highly encouraged. Mine was working bad the first time (the FP registration you perform while you setup the phone) but it improved significantly after I deleted the FP and tried again within the phone security menu. Now I don't remember the last time it failed to recognize my finger

DeadPotato said:
Did you registered your fingerprints again after removing the the screen protector? I've read somewhere on the phone that changing the glass cover may affect accuracy and registering your fingerprints after changing it is highly encouraged. Mine was working bad the first time (the FP registration you perform while you setup the phone) but it improved significantly after I deleted the FP and tried again within the phone security menu. Now I don't remember the last time it failed to recognize my finger
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Yep, I did re-register my fingerprints after I removed it. I always had the face recognition enabled. I did try & disable that after reading this thread, but I only gave it a day. Maybe I need to be a little more patient.

Quite honestly I got the 6T thinking of the fingerprint scanner as a gimmick more than anything else, but since day one, I have been more than impressed and pleased with the accuracy and speed of the screen unlock while using it. And yes, it keeps getting better and better over time. Couldn't be happier!
Sent from my ONEPLUS A6013 using Tapatalk

exhibitA said:
Yep, I did re-register my fingerprints after I removed it. I always had the face recognition enabled. I did try & disable that after reading this thread, but I only gave it a day. Maybe I need to be a little more patient.
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Try registering each finger at least twice. That helped me a lot. My thumbs also work better than my index fingers for some reason. I have each thumb registered once and both index fingers 3 times and it works great.

I'm always using my right thumb and it's working 95% of the time with it.
But my other fingers are total crap! But that's cause I never use them for unlocking.
So it will get better with every usage. At first it's a bit annoying but after weeks it's just awesome.
And try to put your phone down and pick it up while training your fingerprint. You get different angles this way

I must admit that I'm a bit disappointed by the fingerprint reader. It is very fast right after registering but then slowly started to get slow and even fail over time, instead of getting faster as some mention.
I have cleared cache many times, removed and re-added the fingerprints, added the same finger twice, used the fp reader 30 times in a row, but still the same happens overtime.
This has been done with and without a screen protector.
I'm on ob4 now, but it was the same on stock and previous betas.
I also noticed that after removing all fingerprints, when I register a finger, it sometimes says that a similar fingerprint was detected (although there are no other fingers registered). This is not normal. When fingerprints are removed, any previous registered data should be wiped from the database/partition used to store the fingerprint data.
Having to completely wipe the phone to clean old data should not be necessary.

I thought the fp sensor was crap at first. Once I realized I had face unlock on at the same time, I figured out that was my problem. After turning it off, unlocking by fingerprint is super quick and accurate. Like others, I was careful to register my thumbs multiple times, making sure I turned it at slightly different angles each time. Working great!
I'm using the Cosmos animation.

No issues here and I have both of those options enabled. I am also using a liquid skin protector as well, not glass. But that has nothing to so with face unlock. I find they both have their scenarios that compliment each other quite nicely. Unlocks damn near as fast as the HW based ones

joaste said:
I must admit that I'm a bit disappointed by the fingerprint reader. It is very fast right after registering but then slowly started to get slow and even fail over time, instead of getting faster as some mention.
I have cleared cache many times, removed and re-added the fingerprints, added the same finger twice, used the fp reader 30 times in a row, but still the same happens overtime.
This has been done with and without a screen protector.
I'm on ob4 now, but it was the same on stock and previous betas.
I also noticed that after removing all fingerprints, when I register a finger, it sometimes says that a similar fingerprint was detected (although there are no other fingers registered). This is not normal. When fingerprints are removed, any previous registered data should be wiped from the database/partition used to store the fingerprint data.
Having to completely wipe the phone to clean old data should not be necessary.
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I have observed the same issue too and I'm sure most people here are also facing the same issue.
When you register your finger prints again, unlocking is blisteringly fast, it's as if your phone has magically increased the unlock speed and the speed it takes for the fingerprint sensor technology to do it's job.
This doesn't last long as after the device has been asleep for some time, the fingerprint reader becomes basically lazy again, it will still read your fingerprints, but the success rate noticeably decreases.
I've noticed this for some time now.
Another observation I've made is that changing the animation type, also results in the fingerprint sensor suddenly becoming super fast, again this is not permanent as it becomes noticeably slower after some time.
To me these issues appear to be software / coding related, as the scanner is clearly capable of recognising and unlocking the device at fast speeds, the issue is with consistency.

When you guys talk about registering the same fingerprint again, are you deleting the first one or just adding it again? I keep getting an error saying that fingerprint is already registered. The weird thing is, I don't have any issues with my banking apps that I sign in with my fingerprint.

exhibitA said:
When you guys talk about registering the same fingerprint again, are you deleting the first one or just adding it again? I keep getting an error saying that fingerprint is already registered. The weird thing is, I don't have any issues with my banking apps that I sign in with my fingerprint.
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We are adding the same one again. Just keep slightly moving it so that it registers different areas of your fingerprint. I've registered both thumbs twice and one index finger once for my five total prints.

Finger print scanner is pure garbage. I welcome the one on my old OnePlus 3t. I had to keep registering my finger prints over a dozen times. I've even disabled face unlock but it doesn't make any difference. Tht in screen finger print scanner is a nice idea but hopefully it'll get fixed.

Jank4AU said:
We are adding the same one again. Just keep slightly moving it so that it registers different areas of your fingerprint. I've registered both thumbs twice and one index finger once for my five total prints.
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Ok, thanks. I added both of my thumbs again. I'll just give it some time. I don't see the point of registering any other finger, the placement of the sensor makes the thumb the most logical choice.
Does it make any difference if the phone is unlocked/not a T-Mobile version? I have the A6013 with the bootloader unlocked. Still on the stock (updated) OOS.

What I find weird is that I sometimes have issues unlocking my phone using fingerprint but I've rarely ever had issues with apps that use my fingerprint(Starbucks, Chase/Google pay, BoFA, Google play). Anyone else notice this? I do have both fingerprint and facial recognition on.

I have the same issue as others who have said the fingerprint sensor gets worse over time, not better. I was hoping the 9.0.12 OTA update would fix it. Just received that update today, but the problem remains.
I deleted all the fingerprints and re-entered them afterwards. Nothing has helped, not even factory reset. It's so frustrating because the sensor worked great for me prior to a previous update (9.0.10, I think it was).
I've seen other complaints here and there about the sensor not working. But it seems relatively uncommon, so not taken all that seriously. Guess I'll keep watching here to see if any solutions are uncovered.

bigdogdon said:
I have the same issue as others who have said the fingerprint sensor gets worse over time, not better. I was hoping the 9.0.12 OTA update would fix it. Just received that update today, but the problem remains.
I deleted all the fingerprints and re-entered them afterwards. Nothing has helped, not even factory reset. It's so frustrating because the sensor worked great for me prior to a previous update (9.0.10, I think it was).
I've seen other complaints here and there about the sensor not working. But it seems relatively uncommon, so not taken all that seriously. Guess I'll keep watching here to see if any solutions are uncovered.
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Use the McLaren animation