Touch ID fails in temperature differences ??

Discussion in 'iPhone' started by roeiz, Jan 4, 2016.

  1. roeiz macrumors 6502a

    roeiz

    Joined:
    Sep 13, 2010
    #1
    i have a routine Touch ID failing when the phone is cold and my body is hot immediately after tennis practice. it's a total fail, cannot unlock without password.

    this happens outdoors, so maybe humidity and other stuff have something to do with it,
    but my "research" shows that EVERY TIME the phone is cold and i try to unlock it after practice,
    Touch ID fails miserably.

    anyone else noticed?
    (again - in winter, outdoors, phone is on a bench, trying Touch ID after sport exercise)

    is this something that maybe written in the Touch ID "instructions"?
     
  2. laudern macrumors 6502a

    Joined:
    Jan 5, 2011
    #2
    My winter gets to an average of 25* Celsius. So I'm always bloody hot. *shakes fist at the sun*:mad:
     
  3. kdarling macrumors demi-god

    kdarling

    Joined:
    Jun 9, 2007
    Location:
    Cabin by a lake
    #3
    Is your finger sweaty? And/or is the phone sweaty from temperature differences?

    Moisture will short circuit the Touch Id signal, so that it goes across the surface of your finger instead of through it, which prevents the fingerprint ridges from being read.
     
  4. Goatllama macrumors 6502a

    Goatllama

    Joined:
    Jun 24, 2015
    Location:
    Mountaintop Lair
    #4
    1. Make sure you have the latest version of iOS.
    2. Make sure that your fingers and the Home button are clean and dry.1 For the Home button, use a clean, lint-free cloth to wipe off any dirt or debris.
    3. Your finger should cover the Home button completely, touching the surrounding metal ring. While Touch ID is scanning, you shouldn't press down hard, tap too quickly, or move your finger around.
    4. If you're using a case or screen protector, make sure it doesn't cover the Home button or the surrounding ring.
    5. Tap Settings > Touch ID & Passcode. Make sure that iPhone Unlock or iTunes & App Store is on, and that you've enrolled one or more fingerprints.
    6. Try enrolling a different finger.
    7. If you can't enroll any of your fingers, take your device to an Apple Retail Store or Apple Authorized Service Provider, or contact Apple Support.
    1 Moisture, lotions, sweat, oils, cuts, or dry skin might affect fingerprint recognition. Certain activities can also temporarily affect fingerprint recognition, including exercising, showering, swimming, cooking, or other conditions or changes that affect your fingerprint. [https://support.apple.com/en-us/HT201371]
     
  5. roeiz thread starter macrumors 6502a

    roeiz

    Joined:
    Sep 13, 2010
    #5

    well, that explains it ;)
    many thanks. now i'm sure it's working as it should.
     
  6. Goatllama macrumors 6502a

    Goatllama

    Joined:
    Jun 24, 2015
    Location:
    Mountaintop Lair
    #6
    If only everyone were as reasonable as you (not being sarcastic). :)
     
  7. roeiz thread starter macrumors 6502a

    roeiz

    Joined:
    Sep 13, 2010
    #7
    well to tell the truth,
    at first i said : what is this crap? a little temperature difference in it's unreliable?
    but then i realized that ok, this might be an extreme situation and Touch ID is still not perfect..
    so that's good enough for me (i'm sure the other Touch ID phones have these problems)
     

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