Anyone else have security issues with face unlocking? - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

On my Mi 9T Pro, face unlocking has been very problematic, as I found out that my brother can also unlock my phone. This obviously does not speak to the face unlock's security, as I do not even look that alike to him. When I tried re-adding my face several times it continued to have the same problem, even when I went outside in the bright light to set it up, my brother could still unlock it. I have since disabled it as this likely means it is unlock-able to anyone with a similar face or even a piece of paper.

This is the case with all camera based face unlocking.

Not really, have tried the same with galaxy s8 camera face unlocking, and it doesn't have this issue. I don't think this should have been put in this phone if it as insecure as it seems.

blackalice said:
This is the case with all camera based face unlocking.
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Well there are some differences. Here and many phones are only using a cheap 2d image recognition method, which i would say is mostly only an unsecure gimmick.
additional security would use 2 cameras for a 3d face recognition. Still not as good as a fingerprint lock, but already pretty robust.
with an extra infrared projector it is also possible to recognize faces in the dark or in too bright places for regular camera images.
Here is a more indepth explanation
https://www.androidauthority.com/facial-recognition-technology-explained-800421/

Related

RM3 fingerprint... Not really convincing here :( But : Face unlocking : super :)

Hi,
Using the Red Magic 3 is quite nice, but one of the major problems to me is the FingerPrint scanner.
It happens really often that I have to "press" the FP scanner several times before it lets me in
But on the other had, Face unlcok works superbly here !
It recognizes my face everytime, even in rather dark environment.
And unlocking is then super fast...
Guess I'll use that more often than the FP scanner
You guys also have that "problem" with the P scanner ?
No its working perfect for me, much better then the fp sensor of the xiaomi mi mix 2 (my prev phone). Meaby try to set it up again?
I had the same problem, then it went away, then it came back.
Saw some people complaining here as well on github.
Funny thing for me, seem to be related to having activated multiple users in this device and for some reason the finger print only works (normally) on this second account. Deleting that saving account did not solve the issue as the sensor continues completely irresponsive in my main account (so it's clearly just a software issue). If I recreate a second account it will work there, but still not in my main account.
Do you have more than one user registered for that device? I use the other users mainly to have alt accounts for different games
I'm in touch with their (slow) support and the last message I got was:
We will feedback this case to our R&D .Pls provide the order number and Build number of the phone.If you can, please also provide a video file of this process,thanks.
In my case it's clearly just a software issue, so it should be fixed in future builds (hopefully).
Perhaps a factory reset would help, but I don't want to test that option as I'm lazy to set up everything up again.
Hi,
Same thing here.
The FP scanner is not on par with some of the RM3 sibblings like the Mate 20x or the mi mix 3.
I think the scanner is too small to recognize your fingerprint decently.
But if I compare Face unlock on this device to face unlock on the afroementioned devices, it's a totally different story !!!
It is amazingly fast and reliable, even in low light conditions...
So I am almost always using that one.
Regards.
No problems here with the FP scanner.
I'm on Global ROM,bootloader is still locked,no root and only my account registered to the phone,but I've setup 4 fingerprints,and all of them work quite good....

What are the missing features by region other then Soli ?

I'm planning to buy Pixel 4 xl
and I knew that Project Soli won't be available in my country (Lebanon, but other countries as well),
so I'm concerned about buying the phone and discovering other features that won't work because of my region
have anyone found any other thing disabled?
and does the disabling of motion sensor affect the face recognition unlock?
thanks for your time
It won't affect the face unlock,only 2 things are disabled.
gm007 said:
It won't affect the face unlock,only 2 things are disabled.
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From what I've read, motion sense is sometimes used to wake the IR camera on the phone as your hand approaches the device making the process slightly faster. Obviously, face unlock would still work but it will be slightly slower if Motion Sense is disabled.

Any way to make face unlock work on p5?

Love having a finger print reader on the phone but do miss the face unlock in certain situations like if the phone is in the car cradle or sitting on my desk. Any way to add it? Not sure why we don't have it. Used a oneplus 8 for 2 weeks and it used the front camera to unlock the phone.
IIRC, OnePlus added face unlock to the OP3/3T through an update without any special sensors so maybe it is possible, but it might not be the most secure form of unlocking.
While a lot of people seem to like it, it's an awful form of security.. Maybe that's why they've decided to not use it, I know I wouldn't.
Iris sensor FTW

Question Alternate Face unlock

I saw this while searching the phone and looked it up saying i can use it with sunglasses on. But when i try to register it says no face recognize. I'm wondering is this because of the type of sunglasses or you was there an update to remove this for security reasons since nothing out there seems to be in the last few months
hey,
I was just going through your post and came to know about the query. This is usually due to the sunglasses as the sensor scans the retina of your eye directly. So as the eye gets covered that's why the phone cannot recognize it.
obliged!
...and this is where miss the 3D face recognition from mate 20 pro...had 2 faces registered (don't you dare call me two-faced!) and it worked fine with sunglasses, even with the option "open eyes only".
So I perfected the fingerprint recognition,trying so many times that I get <1% errors these days.
Samsung face unlock is not secure anyway.
BTW..."Scans the retina"? You wish. It's general face recognition, that's why it can be fooled by placing your picture in front of the FFC.

Question Fingerprint scanner issues.

After a few days with the Pixel 7, sadly, I decided to return it.
The biggest reason is the fingerprint reader just didn't work right. 3 out of 4 finger presses don't work. I don't know if it's just a faulty phone that I got, but I got tired of redoing the fingerprint scans.
I have Pixel 6 and the fingerprint reader works very reliably.
The Face Unlock works but I found a bug that if the face unlock is enabled, then for all of the 3rd party apps that use biometric login, the fingerprint unlock stops working and these apps don't support the face unlock.
I had a terrible time getting mine registered and working. I have dry fingers and after moisturizing a little, the enrollment went in one go and the fingerprint works as fast as any other phone.
I have no idea how I got it fixed but I was having the same issue as you. I disabled verity and verification to flash custom kernel (wiped phone after verity) and after that the FP reader is working with 100% accuracy. It was night and day for me.
The fingerprint reader seems to be worse on the Pixel 7 than it was on my Pixel 6. It's fast but has a much higher failure rate.
Has anyone seen a difference with the animation speeds changed in developer options?
My son has my old pixel 6 and the fingerprint reader is working great.
{Mod edit: Quoted post has been deleted}
I tried it in any way I could think of. Dry, wet, sanitized with alcohol, greasy, dirty, you name it. Did not work.
feligoni said:
I have no idea how I got it fixed but I was having the same issue as you. I disabled verity and verification to flash custom kernel (wiped phone after verity) and after that the FP reader is working with 100% accuracy. It was night and day for me.
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If I pay $600 for the phone and have to do ADB "contortions" to get the FP scanner to work, then I don't need the phone like that.
A "cheap" inlocked Chinese POCO phone with under screen FP reader works 100% of the time without disabling dm-verity.
Wow I find my Pixel 7 to be much better on the FP scanner than my P6 was, I even added a screen protector after enrolling my prints. I also now use the face unlock and have no issues with Apps that use the FP biometric option. This phone is way better than my P6.
xela19115 said:
If I pay $600 for the phone and have to do ADB "contortions" to get the FP scanner to work, then I don't need the phone like that.
A "cheap" inlocked Chinese POCO phone with under screen FP reader works 100% of the time without disabling dm-verity.
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Agree - I'm fairly familiar with Xiaomi phones and their FP readers are pretty reliable. I'm surprised how poorly my Pixel 7's reader is. In this day and age, we shouldn't have to compromise on what's supposed to be a stable technology after paying $600.
I do notice something interesting though - the failure rate is very high when I try to unlock it after a little while (a little while being >15m). But, if I fail and enter my passcode, every subsequent try is super fast. It's almost as if the phone realizes it's not doing a good job a the initial recognition, adjusts its stored FP data, and then gets better for a while. Anyone else notice this?
xela19115 said:
After a few days with the Pixel 7, sadly, I decided to return it.
The biggest reason is the fingerprint reader just didn't work right. 3 out of 4 finger presses don't work. I don't know if it's just a faulty phone that I got, but I got tired of redoing the fingerprint scans.
I have Pixel 6 and the fingerprint reader works very reliably.
The Face Unlock works but I found a bug that if the face unlock is enabled, then for all of the 3rd party apps that use biometric login, the fingerprint unlock stops working and these apps don't support the face unlock.
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Click to collapse
Really? I have not had that problem - any conflict between face unline and Finger for Biometric apps. Face unlock is outstanding. Fingerprint reader is meh, ok, sometimes
a1b2c3d4444 said:
Agree - I'm fairly familiar with Xiaomi phones and their FP readers are pretty reliable. I'm surprised how poorly my Pixel 7's reader is. In this day and age, we shouldn't have to compromise on what's supposed to be a stable technology after paying $600.
I do notice something interesting though - the failure rate is very high when I try to unlock it after a little while (a little while being >15m). But, if I fail and enter my passcode, every subsequent try is super fast. It's almost as if the phone realizes it's not doing a good job a the initial recognition, adjusts its stored FP data, and then gets better for a while. Anyone else notice this?
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Click to collapse
I have noticed that same thing on my 7 Pro although for me it's more like an hour+ where it gets bad... It will be fine all day then I set my phone down for awhile, pick it up later, and it will instantly fail all three times and then start working again after my PIN goes in. Very strange. Probably can be fixed with software.
No problems here, had the phone for a week now. I don't think I've had any failed reads, maybe one or two. Very reliable and fast, perfect combo with the face scanner.
Mine was failing like crazy. Tried everything. Took it back and exchanged for a new one and the new one is working great. Definitely some faulty hardware out there
a1b2c3d4444 said:
Agree - I'm fairly familiar with Xiaomi phones and their FP readers are pretty reliable. I'm surprised how poorly my Pixel 7's reader is. In this day and age, we shouldn't have to compromise on what's supposed to be a stable technology after paying $600.
I do notice something interesting though - the failure rate is very high when I try to unlock it after a little while (a little while being >15m). But, if I fail and enter my passcode, every subsequent try is super fast. It's almost as if the phone realizes it's not doing a good job a the initial recognition, adjusts its stored FP data, and then gets better for a while. Anyone else notice this?
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Click to collapse
similarly
Mine works flawlessly every time. The only thing I don't like is using it at night, and not covering it with my entire finger. When it scans, it's so freakin' bright! LOL
My 7 Pro's sensor worked great, my regular 7's is just plain awful. And I know about the dry hands issue, I've been preaching that people moisturize their hands since under-display sensors came out.
At the first time with my pixel 7 the i had your same issue, fp wasnt working 9 time on 10 but then, after registered it again correctly (reading the on screen instruction while do it) is started to work flawlessly every time. Now it is always unlocking the phone, with more light or in the dark (at night for example) and with low or high brightness.
a1b2c3d4444 said:
I do notice something interesting though - the failure rate is very high when I try to unlock it after a little while (a little while being >15m). But, if I fail and enter my passcode, every subsequent try is super fast. It's almost as if the phone realizes it's not doing a good job a the initial recognition, adjusts its stored FP data, and then gets better for a while. Anyone else notice this?
Click to expand...
Click to collapse
This was the case with my P7 too. But since past few days, it started to work like 10/10. I haven't noticed any failure since yesterday. Never changed the fingerprint data too.
Update!
I returned the phone. I waited until I got the refund, took a train ride to NYC, and went to Google's Chelsea store. I bought a new Pixel 7 128 GB, traded my Pixel 6, and spend about 2 hours setting up everything in the store. Another advantage of going to the store is that I don't have to pay $600 + tax immediately and then wait 2-3 weeks for a $490 trade-in credit. They take the trade-in and I paid the difference.
If the fingerprint scanner on the new phone would have given me the same issues, I would have at least dealt with it in the store.
And it did start giving me issues initially, but then I asked for assistance and they (store tech support) admitted that Pixel 7's have fingerprint reader problems. He changed the sensitivity setting on the phone and it works (for now).
So clearly I had a bad, faulty phone before. Now, with a phone that I got over the weekend, everything works.
xela19115 said:
Update!
I returned the phone. I waited until I got the refund, took a train ride to NYC, and went to Google's Chelsea store. I bought a new Pixel 7 128 GB, traded my Pixel 6, and spend about 2 hours setting up everything in the store. Another advantage of going to the store is that I don't have to pay $600 + tax immediately and then wait 2-3 weeks for a $490 trade-in credit. They take the trade-in and I paid the difference.
If the fingerprint scanner on the new phone would have given me the same issues, I would have at least dealt with it in the store.
And it did start giving me issues initially, but then I asked for assistance and they (store tech support) admitted that Pixel 7's have fingerprint reader problems. He changed the sensitivity setting on the phone and it works (for now).
So clearly I had a bad, faulty phone before. Now, with a phone that I got over the weekend, everything works.
Click to expand...
Click to collapse
which sensitivity setting ?
The scanner is bad, that's all. The crucial thing to make it usable is the right inital scan, if it records your fingers flawlesly it will work (but not the way we expect, only in an acceptable way).
There is no sensitivity setting, he probably mean the display setting.

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