1. felloffthetruck's Avatar
    I leave my iPhone on 24/7 and every now and then it will require me to enter my passcode in order to use Touch ID and access my phone.
    This just happens out of the blue and it's almost like the phone has rebooted on it's own while in standby.

    Anyone else have this problem?
    11-14-2016 11:17 AM
  2. kch50428's Avatar
    My iPhone6 will do it if I haven't used the touchID for a while...
    11-14-2016 12:06 PM
  3. Tartarus's Avatar
    I haven't had this happening for me.
    Only sometimes when it doesn't recognize my fingerprint after multiple times trying.
    11-14-2016 12:09 PM
  4. Ecm's Avatar
    I leave my iPhone on 24/7 and every now and then it will require me to enter my passcode in order to use Touch ID and access my phone.
    This just happens out of the blue and it's almost like the phone has rebooted on it's own while in standby.

    Anyone else have this problem?
    I saw the same question posted in the Apple support forums (IIRC). It's not a bug, but a planned behavior. Security reasons.
    11-14-2016 01:50 PM
  5. felloffthetruck's Avatar
    So, is the phone actually rebooting or just demanding the password every few days?
    11-14-2016 02:55 PM
  6. Quis89's Avatar
    I believe there is a threshold. If the phone hasn't been unlocked in a certain period of time it will ask for the passcode the next time you use it. For example, if you haven't touched your phone in 24 hours it will require you to enter your passcode to unlock it.
    11-14-2016 03:02 PM
  7. Ecm's Avatar
    So, is the phone actually rebooting or just demanding the password every few days?
    It's not rebooting, just asking for the passcode.
    11-14-2016 03:52 PM
  8. maha_wasim's Avatar
    Yes really upgrade to iOS 10 in iPhone 6 and 7 has made the phones harder to unlock. I feel little annoyed and have the sluggish feeling when I see that kepad appearance. But the fact is that if your phone is idle for 48 hour then fingerprint won't help you and that is just for the security reason so no need to worry about
    11-15-2016 02:05 AM
  9. doogald's Avatar
    I leave my iPhone on 24/7 and every now and then it will require me to enter my passcode in order to use Touch ID and access my phone.
    This just happens out of the blue and it's almost like the phone has rebooted on it's own while in standby.

    Anyone else have this problem?
    Do you mean that the phone says that you must enter passcode after a restart, even though you did not restart the phone? And everything else about restarting was the same (i.e., the phone was not connected to WiFi until after the phone was unlocked with the passcode?)

    Yes, I have seen this. It happened a few times, maybe once a day or two, for a few days about a month or two ago, shortly after I installed the weather app "Dark Sky". It stopped right after I uninstalled, except once two nights ago. (I have an iPhone 6s, and this was on 10.0.1, IIRC.) So, my suspicion was that it was app related.
    11-15-2016 05:41 AM
  10. ndirishfan1975's Avatar
    It is a security feature. If you haven't entered your passcode in a certain number of days and haven't unlocked your phone in over 8 hours it requires the passcode. On a side not you should definitely power cycle your phone every couple weeks. Leaving them on 24/7 can lead to problems. Simply turning it off for a few seconds and restarting can help performance immensely.
    mbar9607 likes this.
    11-15-2016 07:01 AM
  11. felloffthetruck's Avatar
    Do you mean that the phone says that you must enter passcode after a restart, even though you did not restart the phone? And everything else about restarting was the same (i.e., the phone was not connected to WiFi until after the phone was unlocked with the passcode?)

    Yes, I have seen this. It happened a few times, maybe once a day or two, for a few days about a month or two ago, shortly after I installed the weather app "Dark Sky". It stopped right after I uninstalled, except once two nights ago. (I have an iPhone 6s, and this was on 10.0.1, IIRC.) So, my suspicion was that it was app related.
    And I also have the Dark Sky weather app.
    11-15-2016 09:21 AM
  12. klecke's Avatar
    I have seen it a few times.
    11-15-2016 11:18 AM
  13. DLieSaS's Avatar
    I'v experienced the same thing – it's really weird, there seems to be no reason or rhythm behind it…
    11-16-2016 02:02 AM
  14. erwaso's Avatar
    It's normal. Happens in my 6S more than my 7+ but I don't mind it since it's semi security feature.
    nikkisharif likes this.
    11-17-2016 07:31 AM
  15. cwbcpa's Avatar
    If you have not used Touch ID to unlock the device in the last eight hours it will require the passcode. It's a security feature, not an issue.
    11-17-2016 12:03 PM
  16. hudss's Avatar
    This was done due to a court decision. A recent ruling can force to unlock phones by fingerprint, but passcodes are still protected.
    The Fifth Amendment means that nobody can be compelled to reveal their passcode, but two separate courts have ruled that there is no protection against providing a fingerprint to unlock the phone.

    So Apple answered by updating the OS sometine during 9.x to force to use your passcode when idle for 8 hours and also every 6 days if your passcode has not been used.
    Last edited by hudss; 11-18-2016 at 11:12 AM.
    11-18-2016 08:15 AM
  17. doogald's Avatar
    This was done due to a court decision. A recent ruling can force to unlock phones by fingerprint, but passcodes are still protected.
    The Fifth Amendment means that nobody can be compelled to reveal their passcode, but two separate courts have ruled that there is no protection against providing a fingerprint to unlock the phone.

    So Apple answered by updating the OS sometine during 9.x to force to use your passcode when idle for 8 hours and also every 6 days if your passcode has not been used.
    Just to be complete, in Massachusetts, if the government knows that you can decrypt a device with a passcode, your fifth amendment right against self-incrimination does not apply. Basically the MA Supreme Judicial Court found that the fact that the government knows that you can decrypt a device means that actually decrypting the device is not giving the government more information. It's a rather deluded ruling, but that's the way things stand where I live.
    nikkisharif likes this.
    11-18-2016 03:52 PM
  18. nikkisharif's Avatar
    Just to be complete, in Massachusetts, if the government knows that you can decrypt a device with a passcode, your fifth amendment right against self-incrimination does not apply. Basically the MA Supreme Judicial Court found that the fact that the government knows that you can decrypt a device means that actually decrypting the device is not giving the government more information. It's a rather deluded ruling, but that's the way things stand where I live.
    I live here too & Mass is like it's own country because it has a totally different set of rules for damn near everything
    11-18-2016 07:48 PM
  19. Ledsteplin's Avatar
    5 unsuccessful tries with touch ID causes it to ask for the passcode.
    11-18-2016 08:56 PM
  20. doogald's Avatar
    5 unsuccessful tries with touch ID causes it to ask for the passcode.
    Very true. However, in the case that I had (and had several times back when I installed Dark Sky), the lock screen had the message that the passcode was required after the phone was restarted. When you have 5 bad Touch ID attempts, the lock screen doesn't have a message about the phone restarting.
    11-21-2016 08:40 AM
  21. Ledsteplin's Avatar
    Very true. However, in the case that I had (and had several times back when I installed Dark Sky), the lock screen had the message that the passcode was required after the phone was restarted. When you have 5 bad Touch ID attempts, the lock screen doesn't have a message about the phone restarting.
    There's several reasons why the passcode is required. I don't see it as an issue. When I tried 5 times, it did say the passcode is required. It wasn't a pop up. Just a small message at the top. That was in iOS 9. I haven't tried that in 10.

    OK, tried 5 times. IOS 10.1.1.
    11-21-2016 09:02 AM
  22. doogald's Avatar
    There's several reasons why the passcode is required. I don't see it as an issue. When I tried 5 times, it did say the passcode is required. It wasn't a pop up. Just a small message at the top. That was in iOS 9. I haven't tried that in 10.
    Now restart your iPhone. You'll see that the message is different (and it doesn't seem that you can take a screenshot of it, either.)

    Your phone shouldn't spontaneously restart.
    11-22-2016 05:37 AM
  23. ItnStln511's Avatar
    I see it when I restart my phone, and also on my iPad if I haven't touched it in a day.
    11-22-2016 08:12 AM
  24. Ledsteplin's Avatar
    Now restart your iPhone. You'll see that the message is different (and it doesn't seem that you can take a screenshot of it, either.)

    Your phone shouldn't spontaneously restart.
    It's always required on a restart. I still see the message after a restart. But, no, you can't take a screenshot.
    Last edited by Ledsteplin; 11-23-2016 at 07:31 AM.
    11-23-2016 07:20 AM
  25. doogald's Avatar
    It's always required on a restart. I still see the message after a restart. But, no, you can't take a screenshot.
    So, just to review the thread, the OP says that his phone appears to restart spontaneously and randomly, has anybody seen this? A number of people point out that there is a security setting that requires a passcode if Touch ID isn't used after a timeout, and you pointed out that this could also happen after 5 bad Touch ID attempts. But I answered, yes, I have seen this exact behavior, and it was a restart, because the message at the top of my phone said that Touch ID was disabled after a restart, but that I believe that it was caused after installing the app Dark Sky, because it stopped happening to me after uninstalling the app. The OP replies that he does have Dark Sky installed, but hasn't replied since to see if uninstalling it solved this problem.

    Since the OP didn't mention that he had tried to use Touch ID 5 times, I think we can rule that out as a cause, with one possible exception - the phone's display lit up somehow in his pocket with the Touch ID facing toward his body and the Touch ID was able to get a capacitive touch through the material of the pocket 5 times and locked out Touch ID.

    I only replied after your 5 bad attempts post because you said that you didn't see it as an issue. My phone was definitely restarting spontaneously, to a lock screen saying that it had restarted, without connectivity to WiFi - so, yes, it was an issue. Don't you agree, or is the phone spontaneously restarting not an issue for you?
    11-23-2016 09:12 AM
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