Touch ID doesn't always work?

I had that issue on my 5S and my 6 Plus but my 6S Plus has been 100% perfect regards Touch ID.

 

I have beat up finger prints so mine is hit or miss. I did make it better by adding a bunch of the same thumb in the Touch ID though.

 

Mine's a bit like that, always works for my thumb, I also did i finger and it never works on that, i've scared it twice but no dice. Just use my thumb now.

 

You don't have to do that. If you go into Settings, Touch ID you can keep touching the home button and it will keep learning you fingerprint so that you can use more of your finger in different positions which makes it much better at recognising it. I can't remember the last time either my 6 or 6s didn't recognise my print.

 

I thought that just showed you which finger you used. Not additional learning?

 

Try it and see. Start in the position where you had your finger set and slowly change your fingers position to incorporate all of the area of your thumb and it will keep learning the rest of your finger/thumb so that no matter what part of your finger/thumb you use it will recognise it.

 

Ah cool, thats good to know!!

 

It's always fascinating to me when I see threads of people saying say touchID doesn't work for them. I've never once had to input my password (outside of when I restart my phone) on my 5s or 6s since setting up touchID.

 

I don't doubt you (or the others who have had this issue before), just as I said it simply is interesting to me when I see a thread detailing touchID issues since I've never seen them myself. Have you tried doing a software restore via iTunes since you said it might be a software bug?

 

The touch ID on my 6s Plus gets it right the first time in the vast majority of cases, but there have been a number of occasions when I've had to touch it twice. I've not had to enter my passcode though.

 

my fingers are a mess and i can't use it at all. i can register a print but it rarely if ever recognizes it. usually works for an hour or so sometimes then basically not at all. didn't end up using apple pay with my 6 because of that. but with the 6s+ I finally decided a couple of days ago to set everything up again and just use passcode.

 

yes, it does. your issue definitely sounds different and maybe software related. mine is clearly just not recognizing my print but trying.

 

Just the opposite. Sometimes on my 6s+ it works in situations where it would never work on the old 6+
Like damp fingers or in the cold. That would trip up the 6+

It's also very fast, esp with Apple Pay and of course the lock screen

 

I'm extremely pleased with Touch ID on my iPhone 6s Plus, especially compared to my old iPhone 6 Plus

 

I have the exact same problem! Happens about once every couple days. Doesn't say print not recognized or anything. It's like it doesn't even know I'm trying to use the scanner. No response at all. Nothing. Until I swipe and enter passcode. Then if I lock, and try again, it works no problem.

 

I've had almost the same thing happy, but when I slide to do the passcode, the home screen pops up. It's like the TouchID unlocked everything, but it got stuck on the unlock screen until I slide it. Weird.