Touch ID success

One of the features of Touch ID is the ability to capture and save up to 5 different fingerprints. This not only allows you to unlock your iPhone with both of your hands, but it also allows you to give multiple users access.

Try to save a sixth fingerprint, however, and you’ll find you’re unable to—the option to add a new fingerprint gets disabled after 5 saves. That is, unless you use this little workaround to register multiple prints to each save…

YouTube user Note Suwanchote (via iMore) posted a video earlier this week of a little trick he discovered that allows you to register more than 5 fingerprints to Touch ID. And it’s as easy as scanning multiple fingers at once.

http://www.youtube.com/watch?v=3Qasx0NUDRw

And here are his accompanying notes:

“When you register a finger, the sensor can recognize and differentiate at a minimum of 5 fingers per each set up.

It does not go up to 10 though but somewhere in between. This means that with the set up, you can have the sensor recognize up to 25 (possibly more) uniques fingerprints. My brother documents this in the video.”

I can confirm this works. If you use multiple fingers while registering a fingerprint, Touch ID will recognize them later. For instance, I was able to unlock my 5s with any finger on my right hand, even though I only “scanned” one.

It’s hard to tell if this is a bug or a feature. But the consensus is that since Apple specifically advertises Touch ID as being able to recognize 5 prints, this little gem will probably disappear in a future update. For now, though, enjoy.

  • ap3604

    Welcome to last week iDB!

    People knew this on the very first day of release (at least the smart ones did).

    • David Gitman

      ..

      • ap3604

        You answered your own question by replying.

        Have a great day.

      • David Gitman

        you too man

      • zachf914

        that’s why your comment got 17 dislikes and his got 39 for a meme. says something doesn’t it.

  • batongxue

    Is it just me or this guy sounds like Walter Junior from Breaking Bad

  • Tyler Flowers

    Does this actually work or is it just creating a terrible single finger print allowing for anyone to get in?

  • seyss

    I set up 2 thumbs and I’m fine….

  • Moayad

    By registering multiple fingers in one go you delay the responsing time of the sensor when you unlock your device.. I would not recommend it at all.

    • Moi

      Agreed

  • Phroggyy

    Several points to this though:
    The phone will only create one entry in the fingerprint data, meaning it does not only work for the fingerprints registered, but might also work for any fingerprint that can be formed from intersecting yours. However, this would require more testing as I am unaware of how these prints are actually saved code-wise.

    Another problem is the speed; you will be creating one large file instead of five small. This means the CPU will have to go through this one file line by line to find the right print.

    On the other hand, if you have multiple files, the processor will be able to check several files at the same time, leading to decreased load and login speed.