TouchID iPhone 6s freak accident?

snavel

macrumors newbie
Original poster
Aug 5, 2014
6
0
Haugesund, Norway
So, last week I helped one on my coworkers set up their new iPhone 6s. I'm the tech-guy at work..
We went through the initial steps, including TouchID. After completing setup and bla-bla, I pressed the home-button to get her to unlock her phone but IT ACCEPTED MY FINGERPRINT.
What the heck? At first I thought it had to be some residual finger-grease-gunk, resulting in "her print" being read, but I absolutely made sure the home-button was perfectly clean.
Still accepted my finger. Her thumb, my index - both were able to unlock the phone.
I deleted the fingerprint, she added her print again - this time only her finger unlocked.

Bug or freak accident?
 

soupcan

macrumors 6502a
Nov 21, 2014
732
2,926
Netherlands
That looks like a pretty serious bug. So you're saying is that you never touched the sensor with that finger yet it still unlocked it every time? Did you touch it during the initial setup phase and then she continued onwards? Because that might cause 2 fingerprints to get into one file.
 
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snavel

macrumors newbie
Original poster
Aug 5, 2014
6
0
Haugesund, Norway
That looks like a pretty serious bug. So you're saying is that you never touched the sensor with that finger yet it still unlocked it every time? Did you touch it during the initial setup phase and then she continued onwards? Because that might cause 2 fingerprints to get into one file.
The first time I touched the sensor was after setup was complete. There is no way two prints was "overlapped" during setup.. Unlocked every time, yes.
 

I7guy

macrumors Core
Nov 30, 2013
20,383
8,212
Gotta be in it to win it
Yes, I did that the same day. Said so in the first post. It never happened again after that..
Chances are it's user error whereby what actually happened with the iPhone setup where different than the recant. If there was truly a bug like that would be all over the Internet.
 
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9fiftyfive

macrumors member
Oct 26, 2015
91
15
So, last week I helped one on my coworkers set up their new iPhone 6s. I'm the tech-guy at work..
We went through the initial steps, including TouchID. After completing setup and bla-bla, I pressed the home-button to get her to unlock her phone but IT ACCEPTED MY FINGERPRINT.
What the heck? At first I thought it had to be some residual finger-grease-gunk, resulting in "her print" being read, but I absolutely made sure the home-button was perfectly clean.
Still accepted my finger. Her thumb, my index - both were able to unlock the phone.
I deleted the fingerprint, she added her print again - this time only her finger unlocked.

Bug or freak accident?
This has happened to me a few times on my iPhone 5s, not sure how. Probably bug
 

MEJHarrison

macrumors 65816
Feb 2, 2009
1,352
1,154
I ran into this last year. I was helping a roommate get her phone setup and we had the same issue. I never touched her phone, yet one of my fingers would unlock it. I posted about it last year, but most people kept telling me that I MUST have accidentally touched her phone during setup (like I wouldn't have noticed that!). One or two people mentioned that my finger might be similar enough to her to fool it. I never did get a satisfactory answer. I finally just dropped it altogether since it wasn't really a problem for us.
 

Shirasaki

macrumors G3
May 16, 2015
9,423
3,438
Probably Apple need to improve this fingerprint sensor, again. This time however, is the accuracy? Precision?
 

DreiD

macrumors newbie
Oct 20, 2015
8
1
Probably Apple need to improve this fingerprint sensor, again. This time however, is the accuracy? Precision?
Most probably and I agree with that! There should be no room for bugs when it comes to private use.
 

Shirasaki

macrumors G3
May 16, 2015
9,423
3,438
Most probably and I agree with that! There should be no room for bugs when it comes to private use.
Yeah, and given the fact that no iPhone camera can deal with retina recognition.

Pretty lucky I don't need to suffer in this generation of iPhone.
 

tl01

macrumors 68020
Jun 20, 2010
2,308
606
I actually had something similar happen with my mom's 6s when I was setting it up for her at the Apple Store. After she did her fingerprint we updated the software and then I picked it up and used my finger print like I would on my phone out of habit and it opened the phone. I was pretty surprised since Touch ID doesn't like my mom's fingerprint...it hardly ever works for her. But I'd didn't keep trying it over and over as we were in a rush. Maybe I'll test it when I see her next.
 

MEJHarrison

macrumors 65816
Feb 2, 2009
1,352
1,154
Most probably and I agree with that! There should be no room for bugs when it comes to private use.
Bug? I don't think anyone is saying anything about this being a bug. I think it has more to do with similar fingerprints. In fact if you Google "similar fingerprints" you'll find tons of articles on the topic. It seems true that everyone's prints are different. But they can be quite similar. Especially among family (twins in particular).

As the technology improves hopefully they'll get more precision and will register less false hits. Until then, anyone who thinks they have the only fingers in the world that will unlock their phone is fooling themselves. I'm not sure how many people would need to try to unlock your phone before someone got lucky, but I've heard 3-4 stories of this happening in the past year.
 

HEK

macrumors 68040
Sep 24, 2013
3,352
5,794
US Eastern time zone
Bug? I don't think anyone is saying anything about this being a bug. I think it has more to do with similar fingerprints. In fact if you Google "similar fingerprints" you'll find tons of articles on the topic. It seems true that everyone's prints are different. But they can be quite similar. Especially among family (twins in particular).

As the technology improves hopefully they'll get more precision and will register less false hits. Until then, anyone who thinks they have the only fingers in the world that will unlock their phone is fooling themselves. I'm not sure how many people would need to try to unlock your phone before someone got lucky, but I've heard 3-4 stories of this happening in the past year.
Interesting, would say it's mighty rare. How many millions of iPhones with print ID out in world now? I remember early on when Print ID first started someone tried doing several fingers at same training. And it would accept multiple fingers on one prints. They did it to get more fingers to be accepted.