1. Android Central Question's Avatar
    I turned it off completely and when I tried to turn it back on, it said I couldn't use the fingerprint ID, I had to use the knock code. Apparently I've forgotten the code.
    09-14-2019 07:53 PM
  2. mustang7757's Avatar
    Hi, welcome to Android Forums

    I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.

    I'll provide a link to register, please come back to your post so we can further assist you . Thank you

    09-14-2019 07:56 PM
  3. mustang7757's Avatar
    09-14-2019 07:56 PM
  4. B. Diddy's Avatar
    Welcome to Android Central! It is normal for most Android devices to periodically ask for the backup PIN/password/pattern, even if the fingerprint sensor is working correctly. When you set up your fingerprint sensor, it should have asked you to create the backup PIN/password/pattern, as well as reminding you that you'll need to use it periodically. You may not have much other option besides doing a factory reset from the recovery menu.
    Laura Knotek likes this.
    09-15-2019 02:53 AM

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