Finger print scanner in moto g4plus - Moto G4 Plus Questions & Answers

Guys I had bought moto g4plus mobile few days back. Everything is fine but sometimes finger print scanner doesn't work . why is this so. But after times it works properly. Why is this so? Plzzzz help me n let me know the solution fast

[email protected] said:
Guys I had bought moto g4plus mobile few days back. Everything is fine but sometimes finger print scanner doesn't work . why is this so. But after times it works properly. Why is this so? Plzzzz help me n let me know the solution fast
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Click to collapse
What happens when it does not work? Does it ask you for pin? Do u feel any vibration? Does it happen when u reboot the phone or just after you wake up and try to unlock the phone?
Sent from my Moto G4 Plus using Tapatalk.

It happens when I try to open my phone.
It does ask anything, when I keep my finger on the scanner anything happens so I always open it by pattern .

[email protected] said:
It happens when I try to open my phone.
It does ask anything, when I keep my finger on the scanner anything happens so I always open it by pattern .
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Click to collapse
yup it happens and its very irritating. You have to keep finger for long time on the scanner when this happens.

Scan a few fingers, when it happens to me I find trying another finger works straight away.

Related

Fingerprint Reader Issue when Charging

I know that a lot of people have had issues with the finger print scanner and home button, but I didn't see this mentioned anywhere.
When my phone is charging, the fingerprint reader doesn't read my fingerprint properly. It can tell that I have a finger on the scanner, but returns "Try again" and then fails. Is this an issue others are having, or should could it be an issue with the USB-C cable I purchased?
Thanks in advance.
I don't have this issue and my OP2 is currently charging using the official cable.
I faced this issue sometimes, failing to identify a pattern when it works and when it doesn't
Sent from my ONE A2003 using Tapatalk
napes22 said:
I know that a lot of people have had issues with the finger print scanner and home button, but I didn't see this mentioned anywhere.
When my phone is charging, the fingerprint reader doesn't read my fingerprint properly. It can tell that I have a finger on the scanner, but returns "Try again" and then fails. Is this an issue others are having, or should could it be an issue with the USB-C cable I purchased?
Thanks in advance.
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Click to collapse
I also have this problem. I hope they solve this problem with Oxygen 2.1!
Otrlucas said:
I also have this problem. I hope they solve this problem with Oxygen 2.1!
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Click to collapse
Let's hope it's a software issue and not an issue with the hardware.
it's 99.99% hardware
I've just been through a remote session, where tech-support reflashed oxygenOS. I am suffering from the home-button not responding well when you grab the metal frame with one hand and touch the home-button with the other. In one hand it works fine....people call it a "grounding issue"---- however this problem is hardware related and pissing me off!
RMA .... here I come!
Turns out it's only high powered chargers that are causing an issue. The Anker 2.5A charger causes the device to not recognize fingerprints, while other chargers are fine.
Han-Droid said:
it's 99.99% hardware
I've just been through a remote session, where tech-support reflashed oxygenOS. I am suffering from the home-button not responding well when you grab the metal frame with one hand and touch the home-button with the other. In one hand it works fine....people call it a "grounding issue"---- however this problem is hardware related and pissing me off!
RMA .... here I come!
Click to expand...
Click to collapse
With the RMA, they send you new device right?
Also what did they do during the session. They wanted to do the same for me, but I didn't want to give them access to my home PC.
They flash your device to factory state with oxygen OS 2.0.2
You can follow every step and abort at any time you want.
I think it's a standard procedure before the will grant RMA...hello bureaucracy!
I had faced this issue. Called up customer care they asked me to delete data and wipe cache using following way
Shut down phone
Press volume down and power key for few seconds
Choose wipe data and cache
Reboot
This will delete all ur data.
I did this yesterday and since then have not faced this issue whils charging. Lets see if this fix works.
Sent from my ONE A2003 using Tapatalk
Ok folks.. So after doing above steps... I tested this for 3 days and till now issue not reoccurred. So lets hope for the best
Sent from my ONE A2003 using Tapatalk
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Unlock 6P when laying on Desk?

Definitely enjoying the Nexus 6P after getting it yesterday. After bringing it to work that, I have to say that it's a little frustrating having to pick it up to unlock it with the fingerprint reader on the back. Coming from a Galaxy S6 this wasn't an issue since it was on the front. Besides that I'm definitely enjoying this phone more.
I was thinking about getting a dock for it, but realizing it would be the and issue. This is where double tap to wake would really come in handy if a dev ends up figuring out a way to get that to work (if it's even possible).
I was going to try to look into making my fitbit a trusted device if possible which could help the issue. Anyone else struggling a bit with the same thing? I really like having the fingerprint reader on the back otherwise. Or anything else people are using for this? I definitely don't want to set a trusted location at work...
Thanks in advance!
-J
Sent from my Nexus 6P using Tapatalk
are you to lazy to press the power button on the side and punching in a code?
While the phone is face up on the desk you can still unlock the phone by swiping up from the bottom of the screen and using your normal unlock method. The other option is to lay it face down and touch the sensor before picking it up.
I was thinking about not using Smart Lock because of the finger print sensor. I found it convenient to have it unlock paired to my smart watch because of this reason. I don't have to pick it up to unlock.
I Smart Lock with my Pebble Time, and a 5 second lock delay when not paired. I wear my watch when I'm out of the house but it usually stays within range and unlocked when I'm at home as well. I do find myself still using the fingerprint scanner to wake the device as I take it out of my pocket even when a PIN isn't required.
nbaj2k said:
Definitely enjoying the Nexus 6P after getting it yesterday. After bringing it to work that, I have to say that it's a little frustrating having to pick it up to unlock it with the fingerprint reader on the back. Coming from a Galaxy S6 this wasn't an issue since it was on the front. Besides that I'm definitely enjoying this phone more.
I was thinking about getting a dock for it, but realizing it would be the and issue. This is where double tap to wake would really come in handy if a dev ends up figuring out a way to get that to work (if it's even possible).
I was going to try to look into making my fitbit a trusted device if possible which could help the issue. Anyone else struggling a bit with the same thing? I really like having the fingerprint reader on the back otherwise. Or anything else people are using for this? I definitely don't want to set a trusted location at work...
Thanks in advance!
-J
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
Unfortunately I've never found smartlock with a fitbit reliable. It only senses the fitbit when the fitbit syncs....it's not always connected. But for real....press the side button and punch in your pin. 1st world problems.
I turned off the finger print scanner for this reason alone. Now I'm just waiting for NRT (I'm too lazy to manual root these days) to be updated so i can root it and fix the rotation on the lockscreen and hopefully add double tap to wake as well. I normally have my phone on a cell phone stand when I'm at my desk, so its always in landscape. Not having the lockscreen able to rotate is dumb, especially in the car. I'm also thinking of just putting one of those NFC stickers on that cell phone stand at work. Just need to find the ones i have.
Dt2w is available with flar2's kernel now
Double tap to wake is available with stock kernel, as well. Just need to enable it using the code in flar2's kernel thread. Of course, this requires root.
On topic, I find myself lifting the phone up to use my fingerprint to unlock the device. Sure, I could double tap it and input my pattern, but it seems easier to just pick it up.
Wasn't trying to come across as lazy (although I'm sure I did!) Just adjusting to the fingerprint reader on the back and was trying to get different thoughts. I'm possibly going to give double tap to wake a try, thanks for mentioning that.
Sent from my Nexus 6P using Tapatalk
Dont worry about it, I don't like it either. A sensor in front is just as easy to use and unlike the rear sensor can be used without picking up the phone. Nor do I want to enter in my very long and complex password every time I want to check my notifications, use the calculator, etc. as the phone sits next to me on the desk. Calling this lazy is baffling to me, I work hard to lay out my phone out and configure it so it can perform with absolute maximum efficiency allowing me to get get to and use any application or the phone itself with the minimum time invested. Of course everyone knows they can enter their password as an alternative, suggesting it is pointless and why anyone would want to I cant guess.
For me in the most part it's a non issue because the majority of times when I have the phone sitting next to me in that scenario it's at work or at home and the phone is already unlocked. Double tap and I'm rolling. Course I knew all this going in but I had hoped I'd make friends with the rear location and that hasn't happened and probably wont. I like this phone, pretty darn solid device but its not perfect.
If the sensor was on the front, people would complain it wasn't on the back. Can't please everyone with that.
In my opinion, it's in the perfect spot. Coming form a Nexus 6 and before that a Moto X 2013, I loved the dimple and always put my finger there naturally. The Nexus Imprint is the same way. Today I forgot my Pebble Time on the charger so Smart Lock isn't active. Using the sensor is working great instead of entering my PIN. I think the placement on the back makes the most sense because there is already a way to unlock from the front (touch screen). Putting both on the front would likely mean a bigger device/smaller screen or very odd placement (off the the side of the speaker or something). The only happy medium would be putting it on the side with the power button, but that could still mean you'd wear out the physical power button using it all the time. The Nexus Imprint has no moving parts and saves your power button for the good stuff like getting into the bootloader.
I use smart lock with locations for my home and office so i don't need to unlock the phone when it's on a desk at work or at home. I also set my phone lock to 20 min after sleep and to not lock instantly when power button is pressed. I don't see the need for your phone to be constantly locked. If I leave it somewhere it will lock in 20 mins but if I'm actively using it then I don't want to to keep locking.
nonnasmyladie said:
I use smart lock with locations for my home and office so i don't need to unlock the phone when it's on a desk at work or at home. I also set my phone lock to 20 min after sleep and to not lock instantly when power button is pressed. I don't see the need for your phone to be constantly locked. If I leave it somewhere it will lock in 20 mins but if I'm actively using it then I don't want to to keep locking.
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Click to collapse
I do the same thing. I made home and work trusted places and use the phone at my desk without having to worry about unlocking it.
I personally use Smart Lock with my Moto 360. Works well for me.
lizardrod said:
I do the same thing. I made home and work trusted places and use the phone at my desk without having to worry about unlocking it.
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I could never get smart location to work for me. it's really odd that yours stays unlocked at home.
valapsp said:
I could never get smart location to work for me. it's really odd that yours stays unlocked at home.
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I don't use it, but I've seen people say that it works better if you setup four locations directly around your home instead of just one centered on it. This way they overlap and if you're in any of them, you'll be unlocked. The very center being the most saturated area with all four circles overlapping.

Fingerprint issues

How do you get the phone to recognize youe fingerprint? It is so annoying how it keep failing to recognize the fingerprint and asks to enter the code or pattern.
Cerberus123 said:
How do you get the phone to recognize youe fingerprint? It is so annoying how it always asks to enter the code or pattern.
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Click to collapse
Go to Settings -> Security -> Nexus Imprint. Follow on screen instructions to register your fingerprints (up to 5).
I believe there is a setting to not have to input a code every time, check to see if that is your issue. I only have to enter a pin after a reboot, then just the fingerprint unlocks the phone.
Raistlin1 said:
I believe there is a setting to not have to input a code every time, check to see if that is your issue. I only have to enter a pin after a reboot, then just the fingerprint unlocks the phone.
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Click to collapse
I didn't explain myself well I guess. It happens to not recognize the fingerprint and then asks for pattern/code. It is annoying.
First I would say to clean it well. Second i would suggest you reset the print and add extra sets too. Also what ROM, firmware ect are you running? I have had flawless experiences with my sensor across various ROMs. I do a full set scan for 4 fingers. My 2 pointers and my 2 middles as well as another scan set for odd positions. This ensures no matter what I'm holding or position my phone's in it will be easily unlocked.
mattdiehl83 said:
First I would say to clean it well. Second i would suggest you reset the print and add extra sets too. Also what ROM, firmware ect are you running? I have had flawless experiences with my sensor across various ROMs. I do a full set scan for 4 fingers. My 2 pointers and my 2 middles as well as another scan set for odd positions. This ensures no matter what I'm holding or position my phone's in it will be easily unlocked.
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Click to collapse
Running chroma 2/3 build with february firmware but I don't think that's the issue. I will try to register it again. Thanks.
Cerberus123 said:
How do you get the phone to recognize youe fingerprint? It is so annoying how it keep failing to recognize the fingerprint and asks to enter the code or pattern.
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I've had the same problem since the last week after updating a resurrection remix version. I think it's been doing something weird, but it'll unlock normal in the car and stuff so I don't know. Seems like when I put my finger on the sensor it will wake the device and want me to enter a PIN. If I put an unregistered finger on the sensor it won't wake it it'll stay black screen. It might be something to do with when you are at home with smart unlock. Hmmm....
dontbeweakvato said:
I've had the same problem since the last week after updating a resurrection remix version. I think it's been doing something weird, but it'll unlock normal in the car and stuff so I don't know. Seems like when I put my finger on the sensor it will wake the device and want me to enter a PIN. If I put an unregistered finger on the sensor it won't wake it it'll stay black screen. It might be something to do with when you are at home with smart unlock. Hmmm....
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Click to collapse
I thought it could be the smart unlock and removed it but still same thing. Might have to go all stock and test it again. I had another nexus 6P before and that one you get unlocked really fast without any issues.
Edit: Found the issue. Double tap to lock ftom Nova was forcing the device to request pattern or pin.

Fingerprint sensor stopped working

So, I took delivery of my G4 plus less than ten days ago.
Everything worked fine, except that the fingerprint sensor occasionally acted up. It would often fail to recognise my fingerprint, about one out of every ten scans; but i assumed that my dry skin had something to do with it.
Today morning, upon waking up, I noticed the phone had become unusually hot and switched it off for the first time in nine days. When I turned it on again, the fingerprint sensor was totally dysfunctional.
I tried unlocking with the sensor. No luck. Forget sensing my finger, it wouldn't even vibrate to indicate that an input was detected.
Tried searching for fingerprint sensor in settings. No luck.
Dialed *#*#2486#*#* for CQATest. Attempting to open the fingerprint sensor section resulted in an FC.
Performed a factory reset. Back to square one, still no fingerprint sensor. Initial setup wizard simply behaved like the phone has no fingerprint sensor.
All subsequent attempts to get it to work have failed.
I've been using pattern unlock, and while everything else works fine, the sensor seems to be unrecognized by the phone.
My guess is that it's a hardware issue, but I'm baffled by what caused it. I've been extra careful, never dropped it even on a bed. No water contact. It's stock, no sideloaded apps installed and bootloader untouched.
Google searches proved useless, as did a thorough search of XDA, Moto's forums and a subsequent call to Moto customer care.
Would anyone happen to have a solution? I've requested a replacement from Amazon, but it would be nice to have a quick solution handy if this issue crops up again in future.
Thanks!
check whether in the security settings you get a fingerprint settings. if not search in the settings searchbar for fingerprint. if nothing worked try installing a applock "applock" and try to enable fingerprint within them and try to unlock. an important thing is this one, try using a full screen app of your choice and tap fingerprint sensor. if it opens the softkeys your mobile is messed up with software, if it didn't open the softkeys then the mobile is messed with hardware. cheers
Karthik_pm said:
check whether in the security settings you get a fingerprint settings. if not search in the settings searchbar for fingerprint. if nothing worked try installing a applock "applock" and try to enable fingerprint within them and try to unlock. an important thing is this one, try using a full screen app of your choice and tap fingerprint sensor. if it opens the softkeys your mobile is messed up with software, if it didn't open the softkeys then the mobile is messed with hardware. cheers
Click to expand...
Click to collapse
All these done already, except for app lock. Nothing worked. Hardware problem it is, I've initiated a replacement from Amazon.
Cheers
Same problem sir....so wht ll i do now...no fingure print setup in my moto g4 plus.
...plz help sir
Cul Rubul said:
Same problem sir....so wht ll i do now...no fingure print setup in my moto g4 plus.
...plz help sir
Click to expand...
Click to collapse
If the phone is still within the replacement window, get it replaced. Otherwise, you can:
1. Get it repaired at a Moto service centre if within warranty period (that way you won't lose warranty)
2. Get it repaired at a local service centre (only if warranty has expired and Moto is charging higher for the repair)
Sent from my Moto G4 Plus using XDA Labs

A40 unable to fingerprint-lock after android-upgrade?

It's a small thing, but it bugs me in my daily use of my phone. I recently got my A40 and upgraded Android from 9 to 11, and now I can't lock the phone by touching the fingerprint sensor anymore . But unlocking works fine though. I have been googling around but noone seems to have this problem.
Do anyone in here have aclue to what might be the problem here ?
Since when could you even lock the phone using the fingerprint sensor?
Nonetheless, this is the XDA community of developers, and im sure a random person just needed this functionality on their phone, so they made and app for it..
Anyways, here's a link to a tutorial. It covers exactly what you want, and apparently the app is developed by a couple of XDA developers, so it should be safe too
How to Turn Off Android Screen with your Fingerprint Scanner
Those days are gone when we relied on passwords and PINs to unlock our Android smartphones. These days we have fingerprint and facial scanners. Most of
techviral.net
EDIT: Just realised that the downlaod link is broken lol, heres a link to the apk:
Download Fingerprint to Sleep (com.ztc1997.fingerprint2sleep) 0.2.0 APK | AAPKS
Download Fingerprint to Sleep 0.2.0:
aapks.com
PhotonIce said:
Since when could you even lock the phone using the fingerprint sensor?
Click to expand...
Click to collapse
From the get-go, when I bought my phone. Thought it was normal. My old Moto G5 did same thing. Really handy when you just need to view whatever is on the screen for a short moment.
Locking the screen means turning it off.. (and locking your device so that you have to scan your finger or use a pattern to unlock it again)
Opalappa_Sailing_Goose said:
From the get-go, when I bought my phone. Thought it was normal. My old Moto G5 did same thing. Really handy when you just need to view whatever is on the screen for a short moment.
Click to expand...
Click to collapse
Otherwise yes, the phone's screen will turn on on the lock screen if you touch the sensor and the fingerprint isnt recognised. That's not the same as locking your phone. Locking your phone is the equivalent of pressing the power button once, which puts your phone into sleep and forces you to unlock it again (via fingerprint/pattern etc)
Can you clarify what you're asking for here?
Do you want the screen t oturn on when you tap the sensor or do you want the screen to turn off when you tap the sensor?
And do you want it to unlock when you tap the sensor, or do you want it to turn the screen on onto the lockscreen so that you can see the time/notifications etc?
(The links I posted are for LOCKING your phone using the sensor (turning the screen off and locking it, causing you to have to unlock it again when you turn it back on), because that's what you asked for..
PhotonIce said:
Nonetheless, this is the XDA community of developers, and im sure a random person just needed this functionality on their phone, so they made and app for it..
Anyways, here's a link to a tutorial. It covers exactly what you want, and apparently the app is developed by a couple of XDA developers, so it should be safe too
How to Turn Off Android Screen with your Fingerprint Scanner
Those days are gone when we relied on passwords and PINs to unlock our Android smartphones. These days we have fingerprint and facial scanners. Most of
techviral.net
EDIT: Just realised that the downlaod link is broken lol, heres a link to the apk:
Download Fingerprint to Sleep (com.ztc1997.fingerprint2sleep) 0.2.0 APK | AAPKS
Download Fingerprint to Sleep 0.2.0:
aapks.com
Click to expand...
Click to collapse
I found the app. But somehow it didnt work on my phone. Only worked while app was open. And it made me unable to unlock with fingerprint
Thx anyway for the fast reply. Looks like I have to live with it for a while. Im pretty happy with my phone otherwise!

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