How fingerprint scanning works on the G4 plus? - Moto G4 Plus Questions & Answers

Hi,
I need to know something. I hope you'd help me.
On the g4 plus, how fingerprint scanning is working? the sensor is excited for finger's sense at all times or only when the phone's held in the hand ie when the phone detects a motion? Asking this 'cause I'm having some weird problem. My sensor doesn't sense my finger at all when I don't hold it in my hand. I just put a finger on the sensor when phone's absolutely still on the ground in sleep mode, not moving. But the sensor was unable to respond. I have to press it harder to make it detect my fingers. Quite irritating.
But the sensor properly detects and senses my fingers when the phone's in my hand. What could be the problem? Is the sensor defective or it's perfectly normal ?

It doesn't work when is horizontal on a table. If you press slightly harder, the phone moves (tilts "up" the top part a little) and it works.
Weird for me to test since I have registered only my thumbs. I never use it like that. On table I see the notifications and if I need to do something about them, I always lift the phone up from the table.

Mine (UK model) works just the same on the desk or in the hand. no added pressure required. maybe try re-doing the finger registration

Are you sure that the phone's in sleep mode when you touch the sensor? Just put the phone on table for 2-3 minutes and then try to touch the sensor without touching anything other than it. Could you please check it again... Can you unlock the phone?
SP1Viffer said:
Mine (UK model) works just the same on the desk or in the hand. no added pressure required. maybe try re-doing the finger registration
Click to expand...
Click to collapse

Mine (IN model) works perfectly in both situations...

jack_04 said:
Mine (IN model) works perfectly in both situations...
Click to expand...
Click to collapse
In that case, my replacement for the phone isn't unnecessary.

What I feel like when we move the phone a little then it activate s the FPS and it works fine.
But if the phone is stationary for some time and touching the FPS doesn't unlock.
So I think it's not a problem.

Mine works fine also... but I can't use the finger print sensor to sign in apps or remember passwords on the browser (I use chrome) ... I used to have a Galaxy S6 and it automaticaly asked me If I'd like to use the sensor for this ... but G4 don't.. can anybody help me with that? thanks

Related

Proximity Sensor Problem 1.61 :-( Is this the issue?

Hi all again,
I must saw I've NEVER had to do so many posting for a single phone... anyway.
I just updated my Leo to 1.61 via a tortuous goldcard process and the proximity sensor is still not working correctly My wife is the main user of the phone and I was watching her while on a call- the screen was on and off like some demented Xmas lights.
I have a theory regarding the problem. It's only my wife who has the problem with the phone, it's seems ok with me (but I don't use it as much!). The phone is very wide, and the proximity sensor is not central. I think that the sensor is missing her ear (she has small ears!). The gap between her ear lobe top and her head is too great for the sensor. I tested the sensor gap with my thumb and it seems to be around 1cm to activate.
The hardware solution is either move the sensor so it's central (that's not going to happen soon) OR increase the sensitivity of it.
Does anyone know how to change the sensitivity of the sensor OR anyway to completely disable the touch screen during a call.
Hmm I can not believe that, I've tested my sensor:
It put the lights out if i come closer that 1,5 cm next to the screen during a call. So it think this is not the source of your problem.
But: I'm running a 1.48 rom...
I had the proximity sensor behaving eratically upon installing a screen protector. Even though I installed the original HTC screen protector which has 2 holes to position exactly over the sensors but even then I had problems. Ever since removing the screen protector everything is okay again.
Just thought if your problem also coincides with installing a screen protector.
Regards
The problem occurs when your hair overlaps the proximity sensor, the light immediately comes on. Stick the phone back to the ear and the proximity sensor works perfectly on time.
p.s. ive long hair and I too faced this problem and figured it out by running a few test as mentioned above ;-)
Hope this helps.
well, I'm having the same problem and It's not caused because of my hair. it just sometimes works and sometimes doesn't. the test I make is using the palm of my hand. if during one call It's not working, it won't work no matter what you do. then if I make a call and its working, I can turn on and off the screen placing my hand in front of the sensor..
jpresencia said:
well, I'm having the same problem and It's not caused because of my hair. it just sometimes works and sometimes doesn't. the test I make is using the palm of my hand. if during one call It's not working, it won't work no matter what you do. then if I make a call and its working, I can turn on and off the screen placing my hand in front of the sensor..
Click to expand...
Click to collapse
I reckon you clear the area around the receiver and try doing a hard reset.
CAUTION: Take an individual back of your data rather than doing a full backup using some software.
same problem
Hi, I have the same random proximity sensor bug problem. During call accidental hang-up happens every day. I have short hair and no screen protector. Is there any solution for this yet? thanks.
I wrote to HTC already, but they claim there is no problem reported. Sory for my English.
Had a similar problem. My proximity sensor is now working fine. Install the 'Proximity Sensor for Screen Off v0.2' cab. Search the forum for the thread.
thanks for tip, hope this little app will "evolve"...
hi,
i had the problem with the proximite, that it is only working when the phone is in portrait mode. when im incall and portrait i can put my finger to the sensor and it is working perfect. when i rotate the display to landscape the sensor does nothing and the display stays on. unfortunatly i turn the phone sometimes on the way to my ear, and so the screen stays on.
i will try now the mentoined .cab and see what it does for me.
regards mad

[Q] Proximity sensor funkiness?

This has been happening pre and post Nodo on my focus. If i'm on a phone call for at least a few minutes, then pull the phone away from my head, the phone's display should become active, but it isn't.
Anyone else having this issue or is it time to exchange the phone?
I have the same issue also it seems like I have to press the power button a couple of times to get it back.
Sent from my SGH-i917 using XDA Windows Phone 7 App
I'm also having this issue. Anyone remember if ther were having it pre-Nodo? Just wondering if the update changed something.
Regardless, it's a bit of a PITA.
I experienced this after having to replace a cracked screen. I just recalibrated the proximity sensor with my finger about an inch away and it worked fine.
ArcWhistler said:
I experienced this after having to replace a cracked screen. I just recalibrated the proximity sensor with my finger about an inch away and it worked fine.
Click to expand...
Click to collapse
How did you do that?
Yeah, ditto that - how do recalibrate the sensor?
Samsung Diagnostic App.
http://forum.xda-developers.com/showthread.php?t=839154
I was pecking around the screens months ago, and there was one bank of tests (multi-touch, red, green, blue, white, battery, etc, etc) that allowed setting and viewing the proximity sensor.
I remember playing with moving my hand closer, and further and watching it change from sensed to clear.
Sorry, can't remember which codes now.
I used the Wiki:
http://forum.xda-developers.com/wiki/index.php?title=Samsung_Focus
LCD Test - *#0*#
Ok, mine says No Detection. Is there anyway to set the value?
One other thing to note, about the samsung focus specific update regarding disabling the touch sensitive buttons while in a program, that also isn't working for me either. Not sure if they are related, but thought I'd throw it out there.
And as far as calibrating goes, not sure it would help since the problem only occurs while I'm on a longer phone call. On short ones the proximity sensor works just fine.
If you move your finger closer to the sensor, it should eventually change to Detected. The "set" button at the bottom should set the proximity sensor to the new distance. Mine is around 75.
ArcWhistler said:
If you move your finger closer to the sensor, it should eventually change to Detected. The "set" button at the bottom should set the proximity sensor to the new distance. Mine is around 75.
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Click to collapse
Mine says No Dectection. It has Prox Sensor: XXX I've taken my entire hand and covered my phone. NOTHING. When I push SET, It says ProxThreshold :0. Is there anyway to set it manually?
samsung focus post nodo
I believe the prox sensor issue is happening post nodo, I have never had this problem prior to the update... I have been able to fix it temporarily by pulling the battery and starting it up... don't know how long the fix works... got to do some testing... I am wondering if its a power thing as the screen wouldnt work when you plugged it in to power and had on a soft surface....
Still nothing. I didn't want to hard reset since I have Chevron installed. For some reason I did four updates on my phone and don't have a single backup. If I hard reset I'm S.O.L. with Twin Blades and other homebrew apps
What value does it show when you press the Reg button?
I've had issues with my earring tapping the screen while I talk and I had it fixed before NoDo, but the values reset when it was installed, they also appear to be different values now as my screen got supper finicky after the update. I was constantly hanging up or scrolling through multiple pages of stuff with my ear and you could see the screen turning on and off. I ran the proximity calibration while holding my hand in front and set to it to 1.
If it shows xx have you tried setting the value with nothing in front of the phone to see if it will at least zero out?
BooR4dley said:
What value does it show when you press the Reg button?
I've had issues with my earring tapping the screen while I talk and I had it fixed before NoDo, but the values reset when it was installed, they also appear to be different values now as my screen got supper finicky after the update. I was constantly hanging up or scrolling through multiple pages of stuff with my ear and you could see the screen turning on and off. I ran the proximity calibration while holding my hand in front and set to it to 1.
If it shows xx have you tried setting the value with nothing in front of the phone to see if it will at least zero out?
Click to expand...
Click to collapse
It has a big red box. It says No Detection. Prox Sensor:XXX Do I press Set or Reg?
another thing is wrong
seems like my light sensor is fried as well... I am starting to wonder if it's because of bad placement of the usb port... both lay right in front of the port, can't imagine pluging in and unpluging the phone would help if the sensors are right in front. I can't get either sensors to work anymore, even with a battery pull... does anyone else have this issue? goto the diagnosis menu and type
*#05#
you should be able to run through all the tests, I skip the feedback loop... Start at 1 and work your way through.
My Prox sensor says, no sensor XXX, and my light sensor is stuck with a value and will not change even when I cover the sensor... looks like a warranty replacement... how does this work with a sd card installed, the official WP7 ATT certified 8GB? Anyone else have to do this?
rockclimbaudiextreme said:
seems like my light sensor is fried as well... I am starting to wonder if it's because of bad placement of the usb port... both lay right in front of the port, can't imagine pluging in and unpluging the phone would help if the sensors are right in front. I can't get either sensors to work anymore, even with a battery pull... does anyone else have this issue? goto the diagnosis menu and type
*#05#
you should be able to run through all the tests, I skip the feedback loop... Start at 1 and work your way through.
My Prox sensor says, no sensor XXX, and my light sensor is stuck with a value and will not change even when I cover the sensor... looks like a warranty replacement... how does this work with a sd card installed, the official WP7 ATT certified 8GB? Anyone else have to do this?
Click to expand...
Click to collapse
same problem here. seems like those two sensors are burned

Finger print scanner

Hi
My finger print scanner seems to only work about 10% of the time, anyone else had this problem and how do i fix it?
ant78 said:
Hi
My finger print scanner seems to only work about 10% of the time, anyone else had this problem and how do i fix it?
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Click to collapse
No problem here, way better than the sensor on the Note5. Have you used one before? I wonder if your fingers just don't work well with them.
ant78 said:
Hi
My finger print scanner seems to only work about 10% of the time, anyone else had this problem and how do i fix it?
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Click to collapse
Go to setting, security, imprint and setup another finger, you can use the same finger if you like. Make sure if you are using a case on the phone that you setup the imprint with the case on. If you setup the imprint with no case, then put a case on your phone, your phone will read your finger differently, therefore it may not work correctly. You scanner should read your finger 9/10 times if not more
if it works that bad, delete all prints and RE DO
mine has yet to fail
i have set up my finger again, the problem im having is that i can access my phone by the power button thus by passing the finger scanner most times. Surely i should only be able to access my phone when my finger print is confirmed.?
You should just be able to use the finger print scanner and not touch the on button at all. About 99% accurate for me.
When you set it up, did you keep moving your finger on the sensor between presses (not during) to make sure it had a good cross section of the finger to recognse?
All is working fine now after the recent security update from google

Problems with the touch screen and fingerprint scanner

Is anyone having issues with either/both the touchscreen or the fingerprint scanner?
Regarding the screen, I went out last night and the phone remained inside my jeans pocket. Was looking through it this morning to find I have 6 sets of 30 burst photos (of the inside of my pocket), a load of single photos (of the inside of my pocket) and a 10 minute video taken inside my pocket! It looks as though the shortcuts on the lock screen have been activated to open the camera but the phone never left my pocket, I never touched the screen so its a little worrying how easy it is to do that!
And on the fingerprint scanner, I'm finding it really slow to unlock the phone on occasion, and many times it will take several attempts to recognise my print - this is especially true if I have any kind of small "contaminant" on my fingers. Slightest bit of sweat or moisture and it won't work. In fact, its really hard to use unless you have completely clean and 100% dry hands. My GF had a Nexus 5X (before it developed bootloop problems and had to be returned) and the scanner on that was pretty much flawless and would recognise prints in whatever conditions.
Anyone else finding these kinds of issues?
kingdave82 said:
Is anyone having issues with either/both the touchscreen or the fingerprint scanner?
Regarding the screen, I went out last night and the phone remained inside my jeans pocket. Was looking through it this morning to find I have 6 sets of 30 burst photos (of the inside of my pocket), a load of single photos (of the inside of my pocket) and a 10 minute video taken inside my pocket! It looks as though the shortcuts on the lock screen have been activated to open the camera but the phone never left my pocket, I never touched the screen so its a little worrying how easy it is to do that!
And on the fingerprint scanner, I'm finding it really slow to unlock the phone on occasion, and many times it will take several attempts to recognise my print - this is especially true if I have any kind of small "contaminant" on my fingers. Slightest bit of sweat or moisture and it won't work. In fact, its really hard to use unless you have completely clean and 100% dry hands. My GF had a Nexus 5X (before it developed bootloop problems and had to be returned) and the scanner on that was pretty much flawless and would recognise prints in whatever conditions.
Anyone else finding these kinds of issues?
Click to expand...
Click to collapse
Among the other problems, I have one with AOD that tends to disappear even if active.
I also have issue with the fingerprint reader.
Nothing, unfortunately, has changed with the 10L update.
I hope they will do a better work with the next big update promised with the G6 + presentation.
MuttleyMB said:
Among the other problems, I have one with AOD that tends to disappear even if active.
I also have issue with the fingerprint reader.
Nothing, unfortunately, has changed with the 10L update.
I hope they will do a better work with the next big update promised with the G6 + presentation.
Click to expand...
Click to collapse
The problem with AOD could be related to the fact that something is covering the proximity sensor. If the sensor is covered AOD won't display.
My fingerprint has no problem, and my screen never unlocked inadvertently.
Inviato dal mio LG-H870 utilizzando Tapatalk
Erpinoob said:
The problem with AOD could be related to the fact that something is covering the proximity sensor. If the sensor is covered AOD won't display.
My fingerprint has no problem, and my screen never unlocked inadvertently.
Inviato dal mio LG-H870 utilizzando Tapatalk
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Click to collapse
No, the device stays always on the table with nothing on/near it. This issue is relatively new.
The fingerprint reader for some reason in unable to read nothing so I have to unlock with PIN and restart the device.
I think it's more likely that you accidentally managed to double-press the volume down button and activated the camera that way.
At least you can disable those shortcuts. One of my pet peeves is front-facing home buttons that can turn on the screen, that stick out and are easy to activate in your pocket.
The fingerprint reader seems pretty good to me although I've definitely noticed it doesn't work if my finger is wet. Maybe I'm just happy it works a million times better than my old phone.
jdock said:
I think it's more likely that you accidentally managed to double-press the volume down button and activated the camera that way.
At least you can disable those shortcuts. One of my pet peeves is front-facing home buttons that can turn on the screen, that stick out and are easy to activate in your pocket.
The fingerprint reader seems pretty good to me although I've definitely noticed it doesn't work if my finger is wet. Maybe I'm just happy it works a million times better than my old phone.
Click to expand...
Click to collapse
Nope, first thing I did when I got the phone was to turn the shortcut keys off - I previously had the G4 and dislike these on that, so turned them off here for the same reason
kingdave82 said:
Is anyone having issues with either/both the touchscreen or the fingerprint scanner?
Regarding the screen, I went out last night and the phone remained inside my jeans pocket. Was looking through it this morning to find I have 6 sets of 30 burst photos (of the inside of my pocket), a load of single photos (of the inside of my pocket) and a 10 minute video taken inside my pocket! It looks as though the shortcuts on the lock screen have been activated to open the camera but the phone never left my pocket, I never touched the screen so its a little worrying how easy it is to do that!
And on the fingerprint scanner, I'm finding it really slow to unlock the phone on occasion, and many times it will take several attempts to recognise my print - this is especially true if I have any kind of small "contaminant" on my fingers. Slightest bit of sweat or moisture and it won't work. In fact, its really hard to use unless you have completely clean and 100% dry hands. My GF had a Nexus 5X (before it developed bootloop problems and had to be returned) and the scanner on that was pretty much flawless and would recognise prints in whatever conditions.
Anyone else finding these kinds of issues?
Click to expand...
Click to collapse
I have had the camera seem to turn on by itself a few times, but not to the extent that you are describing. My finger print scanner works fine in terms of recognizing my print and unlocking my phone. I have a completely different issue with my finger print scanner though. When I try to clean my fingerprint scanner with a cloth, it triggers the phone to dial 911! It has done it many times from my pocket too. When it did it in my pocket, I could not for the life of me figure out what was triggering the 911 calls. The first few times I didn't even know that it had dialed 911 until 911 dispatch called me back. I finally figured it out one day when I was purposely rubbing the fingerprint scanner with a cloth to clean it, and sure enough, it dialed 911. Sometimes if I just rub it with my bare finger it will dial 911. It's VERY annoying, for me and the 911 operators both I imagine!

Moto E4 XT1767 Fingerprint Scanner Lag

I picked up this phone on my local craigslist late last week (at $15, I could not resist), unlocked it, and have been using it. When compared to my moto Z play, I have to hold the fingerprint scanner longer to turn the phone on or off which for some reason is very frustrating. I do not believe this is a hardware limitation as the fingerprint response is instant if I turn the device on to my lock screen and then touch the fingerprint scanner.
Does anyone know if it is possible to correct this? At the moment, I have to touch the scanner for ~1 second before it will turn on/off my phone. If it were possible to change this to ~0.5 seconds, I would be a happy camper.
skotseno said:
I picked up this phone on my local craigslist late last week (at $15, I could not resist), unlocked it, and have been using it. When compared to my moto Z play, I have to hold the fingerprint scanner longer to turn the phone on or off which for some reason is very frustrating. I do not believe this is a hardware limitation as the fingerprint response is instant if I turn the device on to my lock screen and then touch the fingerprint scanner.
Does anyone know if it is possible to correct this? At the moment, I have to touch the scanner for ~1 second before it will turn on/off my phone. If it were possible to change this to ~0.5 seconds, I would be a happy camper.
Click to expand...
Click to collapse
Are you running stock software? If so, I'd try erasing and re learning your finger prints. I got an E4 for my daughter to use on WiFi - FP sensor is snappier and more accurate than my MZP. If that doesn't do it, I'd be inclined to think hardware issue.
dandrumheller said:
Are you running stock software? If so, I'd try erasing and re learning your finger prints. I got an E4 for my daughter to use on WiFi - FP sensor is snappier and more accurate than my MZP. If that doesn't do it, I'd be inclined to think hardware issue.
Click to expand...
Click to collapse
Well here is the thing: when the phone is on the lock screen (screen turned on and asking for fingerprint or pattern/pin) the fingerprint sensor is instant and always accurate. The only time I am seeing lag is when I hold to turn the screen on (the screen is off but holding the fingerprint sensor turns it on) or off (phone is on and unlocked but holding the fingerprint sensor turns off the screen).
Can you confirm that your daughters phone has a faster response when turning on/off the screen?
i've read from a handful of reviews that the scanner is just simply not as fast as the MZP or even g5+. could be a limitation of the processor? i moved from a MZP to the e4, definitely a noticeable difference in speed.
skotseno said:
Well here is the thing: when the phone is on the lock screen (screen turned on and asking for fingerprint or pattern/pin) the fingerprint sensor is instant and always accurate. The only time I am seeing lag is when I hold to turn the screen on (the screen is off but holding the fingerprint sensor turns it on) or off (phone is on and unlocked but holding the fingerprint sensor turns off the screen).
Can you confirm that your daughters phone has a faster response when turning on/off the screen?
Click to expand...
Click to collapse
Yep, the times I use it, it's normally from screen off condition, or from in use to lock/turn off screen.
I'll try to do a side by side tonight with my MZP
dandrumheller said:
Yep, the times I use it, it's normally from screen off condition, or from in use to lock/turn off screen.
I'll try to do a side by side tonight with my MZP
Click to expand...
Click to collapse
here's a link to a quick head-to-head video. What is apparent is that the other poster is indeed correct - MZP is slightly faster from touch to screen on, and touch to screen off. The difference is slightly more pronounced when waking than going to sleep. What isn't apparent from the video is the timing of the haptic feedback. On the MZP the vibration is triggered almost instantly at touch, with the bulk of the delay from touch to screen on happening after the vibration triggers. On the E4, the vibration occurs around the middle of the span from touch contact to screen on. This gives the impression in use, at least to me, of slightly more laggy sensor (on the E4) but slightly faster unlock times (on the E4).
Guess I don't have to be jealous of my kid's phone anymore. Was a cool experiment.

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