Fingerprint Scanner Not Working Well

[bhatech]

I had very bad experience with my S10+, but I got the S10 yesterday and was relying on face unlock plus fingerprint. But from today after following the "Jimmy is promo" video recommendation, it's been working well for me and got great success rate unlocking, close to 100%. I have turned off face unlock now and will check out over the next day or day to see on how this goes

 

[bhatech]

And here is a boring short video of me unlocking it successfully many times both with screen off and on, with right and left thumb alternatively

https://photos.app.goo.gl/5RdkQWx8pJFbvxyr9

 

[Lobwedgephil]

Well, today my week change from the sensor being flawless, to acting up and not working well with my fingers. If I lick one, and dry it off, and then try, it works for a while. Interesting how it worked absolutely with no issues for me since I got the phone, till now having issues today.

Glad to see you being honest about your experience and not blaming users for not following instructions.

 

[felloffthetruck]

And just how accurate is the FPS if you can register 2 different thumbs as one

 

[Mike Dee]

And just how accurate is the FPS if you can register 2 different thumbs as one

That has nothing to do with the accuracy of the S10 FPS specifically. It still has to match a print and you can record the same way with any FPS.

 

[donm527]

By my calculations... Carry the one.... Square root.... Half as accurate. I think.

But watching the video again, it mentions nothing of being more faster than registering each finger normally nor does it say it would improve accuracy.

The only reason you want to use this tip is if your gonna add more people to allow access to your phone by giving them their own profile to register two fingers with one register.

Why not register both thumbs and both index fingers on one profile then? Each finger 4 times? Or you can register all 10 fingers in one profile right?

Maybe if you have the perfect type of fingerprints that sensors can always get a good read and never experience issues the normal way then his video may work for you. But if you are the person that has occasional issues then obviously you see if you have only 2 or 3 prints recorded per finger you really increase your chances of a miss.

And just how accurate is the FPS if you can register 2 different thumbs as one

 

[Mike Dee]

By my calculations... Carry the one.... Square root.... Half as accurate. I think.

But watching the video again, it mentions nothing of being more faster than registering each finger normally nor does it say it would improve accuracy.

The only reason you want to use this tip is if your gonna add more people to allow access to your phone by giving them their own profile to register two fingers with one register.

Why not register both thumbs and both index fingers on one profile then? Each finger 4 times? Or you can register all 10 fingers in one profile right?

Maybe if you have the perfect type of fingerprints that sensors can always get a good read and never experience issues the normal way then his video may work for you. But if you are the person that has occasional issues then obviously you see if you have only 2 or 3 prints recorded per finger you really increase your chances of a miss.

Yeah...I don't see much point doing it the way of the video. I'll stick to what's already working.

 

[anon(5719825)]

I decided to try something different here to see if it improves unlocking my phone. With my right index finger, it works pretty well but not at all with my right thumb. I had scanned my thumb perfectly straight up on the fingerprint image, even did it twice and it sill never recognized the thumb to unlock.

This time, I put my finger at a 15º angle and scanned it. Now the scanner is recognizing my thumb and unlocking the phone. I'll try it through today and see how it goes.

Some of you having this problem may try rescanning and placing the finger at an angle.

 

[donm527]

That's an intersting thought... I wonder how an ultrasonic sensor scans...

With optical I'm guessing it takes a pic(?) and then it can do its processing to find points to match(?)

But ultrasonic... Does it do a sweep (something like how your home printer /scanner sweeps it's sensor from left o right for a scan) when reading a scan recording building a 3d image of all the ridges and such on a finger. So adjusting your finger with each read say at 15/45 degree angles at each read, the sensor will sweep and may get slight variances of those same ridges in 3d increasing chance of success.

I decided to try something different here to see if it improves unlocking my phone. With my right index finger, it works pretty well but not at all with my right thumb. I had scanned my thumb perfectly straight up on the fingerprint image, even did it twice and it sill never recognized the thumb to unlock.

This time, I put my finger at a 15º angle and scanned it. Now the scanner is recognizing my thumb and unlocking the phone. I'll try it through today and see how it goes.

Some of you having this problem may try rescanning and placing the finger at an angle.

 

[NIZMOZ44]

You would think Samsung would have some programming in there to allow it to read your fingerprint from any angle and not just the common ones you put it on at. Seems it only likes the angles you used for registering it.

 

[anon(5719825)]

That's an intersting thought... I wonder how an ultrasonic sensor scans...

With optical I'm guessing it takes a pic(?) and then it can do its processing to find points to match(?)

But ultrasonic... Does it do a sweep (something like how your home printer /scanner sweeps it's sensor from left o right for a scan) when reading a scan recording building a 3d image of all the ridges and such on a finger. So adjusting your finger with each read say at 15/45 degree angles at each read, the sensor will sweep and may get slight variances of those same ridges in 3d increasing chance of success.

It's worth a try. I'm going to do a second scan of my thumb to see if that helps. I'd prefer to use my thumb because it's just more natural to me then my index finger.

The image on the screen shows the thumb straight up so I'm sure people just assume the finger has to be placed there exactly that way.

 

[Sapient]

Yeah...I don't see much point doing it the way of the video. I'll stick to what's already working.

I can think of a possible use for that technique IF different skin conditions cause the scanner to read differently (and not just fail).

Under normal scanning, each finger is scanned 16 times, all at once, giving your phone 16 looks at those fingers at a specific point in time. But, you could scan 4 fingers 4 times each into each of the 4 fingerprint groupings. By doing this at different times, with your skin at different levels of dryness, you get the same number of scans for each finger, but across a range of skin conditions.

Then again, maybe this would make things worse. If the scanner simply doesn't handle dry skin well, then the dry scans have little value and you just have fewer usable scans for the phone to work with.

 

[Mike Dee]

I can think of a possible use for that technique IF different skin conditions cause the scanner to read differently (and not just fail).

Under normal scanning, each finger is scanned 16 times, all at once, giving your phone 16 looks at those fingers at a specific point in time. But, you could scan 4 fingers 4 times each into each of the 4 fingerprint groupings. By doing this at different times, with your skin at different levels of dryness, you get the same number of scans for each finger, but across a range of skin conditions.

Then again, maybe this would make things worse. If the scanner simply doesn't handle dry skin well, then the dry scans have little value and you just have fewer usable scans for the phone to work with.

You might have a point. The only thing I'll add it may not capture dry skin well. I'm only basing that on an experience 2 winters ago when my my device wasn't reading because of extreme dry skin because I was out in the cold too long.
I didn't have much luck programming it. Of course I'm talking about the extreme.

 

[sydneycooper1979]

Mod Note: Please keep discussion on topic. Thank you!

 

[mustang7757]

You might have a point. The only thing I'll add it may not capture dry skin well. I'm only basing that on an experience 2 winters ago when my my device wasn't reading because of extreme dry skin because I was out in the cold too long.
I didn't have much luck programming it. Of course I'm talking about the extreme.

Couple things I like about the ultrasonic fingerprint is wet hands like swimming or after washing it works not like my other phones with capacitive sensors , and you don't have to wake the device to take pictures of your print like 1+6t, Just goes straight in without waking up.

 

[Ninjarette]

I've concluded this FPS issue needs another upgrade or two. The solution I followed from the guy in the YouTube video only worked for a few days. Now it's back to hit or miss.

Oh well. I'm exchanging mine for a 512gb...that's all that's available. The 128s are sold out...in stores and online.

 

[mustang7757]

I've concluded this FPS issue needs another upgrade or two. The solution I followed from the guy in the YouTube video only worked for a few days. Now it's back to hit or miss.

Oh well. I'm exchanging mine for a 512gb...that's all that's available. The 128s are sold out...in stores and online.

That's got be frustrating , work couple days then act up again. Like what would cause that SMH. Hopefully they send update to keep refining it more .

 

[tcdude]

Like I mentioned before my only real issue with the FPS is occasionally when I try to unlock from a dark screen nothing happens, no error message, no vibration, nothing just a dead screen so I need to wake it to use the FPS

Has this happened to anyone else?

 

[jmcook79]

I had problems at first two then I turned off all the Smart Lock features I had set. On body detection, Bluetooth devices, location unlocking. Then I used it for several days having to unlock it every single time with my finger and now I have no problem whatsoever.

I think it's just a matter of getting used to it and placing your finger in the right place. I also usually tap the AOD to bring up the fingerprint sensor icon or use raise to wake it makes it much easier having something to see.

 

[tcdude]

I had problems at first two then I turned off all the Smart Lock features I had set. On body detection, Bluetooth devices, location unlocking. Then I used it for several days having to unlock it every single time with my finger and now I have no problem whatsoever.

I think it's just a matter of getting used to it and placing your finger in the right place. I also usually tap the AOD to bring up the fingerprint sensor icon or use raise to wake it makes it much easier having something to see.

I agree with you and it doesn't even bother me so much that it doesn't open on first try being that from a dark screen it's hard to see where to exactly place your finger but at least vibrate or give me an error signal of some sort not just what seems like a completely unresponsive phone