iOS 10 Auto-Lock not working.

Brand new iPhone 7 running 10.3.2.

If iPhone is set for a 3-minute auto-lock, AND the home screen is showing, it will fade at 1:10 and go black 20 seconds later. But if an app screen is showing (like Phone/Favorites) it fades a 2:40 and goes black 20 seconds later at 3:00 like is should.

I don't think this is a hardware issue.

If I set the auto-lock to "never" that works... it never goes dark.

Everything else on the phone works fine except the auto-lock time.

Can anyone replicate?

OMG! This happened to me and it was driving me crazy but I've finally figured out that the fingerprint ID finally works correctly and I most always start my phone up with my thumb! Doh! Since it didn't really work before I didn't realise why the suto lock was only working some of the time!

That also happened to me. My batter ran down, and when recharged the auto-lock had changed To 30 sec from never. In "Settings>General the auto lock was greyed-out and it had turned on Battery Saver. I have done that and turned-off my passcode and restarted. Then the auto-lock has now disappeared completely and I'm stuck with 30 sec auto-lock. I have iOS 10.3.2. Help!!

I've also done all the suggestions in this thread and even with auto lock off, my phone still locks up with a password required immediately. Noticed this started a few days ago after the iOS upgrade.

Lame update Apple. Fix this stat!

On my iPad Air (10.3.3) the minimum Autolock setting is 2 minutes. Despite being on, if I got a notification in the night the screen switched on and didn't sleep, depleting the batter by the morning. The passcode off>reboot cure worked for me.

Wife’s iPhone 8 on iOS 11.0.2 had the same issue.

Did the passcode “off/on” fix as posted and all works fine now.

It did hang at “you can use your Apple ID to change your passcode” prompt after trying to turn it back on. All I did was double tap home and kill the setting app and then went back into the settings app and then to passcode to make sure it was set to “on”

All good now.

My auto lock feature doesn’t work correctly. It times out before the 5 minutes I have it set on. If I set it to 30. It goes out in 29. I am not quibbling about that. But when I set it to 5 minutes it will go 2:10 dim and out at 2:29. Anyone else with this problem?

My auto lock feature doesn’t work correctly. It times out before the 5 minutes I have it set on. If I set it to 30. It goes out in 29. I am not quibbling about that. But when I set it to 5 minutes it will go 2:10 dim and out at 2:29. Anyone else with this problem? I also have done the hard reboot and NOT waited the five minutes before restarting. THEN I did wait the five minutes before rebooting and voilá it went 4:57 before locking. Yaaay. Hope this helps anyone else out there with this hiccup.

This just helped me

Auto Enable Passcode on Lock screen

Screen Time out and Auto lock passcode time interval now separated in iOS 10. Unlock iPhone/ iPad screen now using home button possible, Before Passcode enabled on device. That we can manage, Go to the Settings > Touch ID & Passcode > Require Passcode.

(Shorter time is more secure)

see also

Settings > Display & Brightness > Auto-Lock

I tried this:

1. Turn off passcode at Settings > Touch ID & Passcode > Turn Passcode Off.

2. Restart your device.

3. Turn on passcode at Settings > Touch ID & Passcode > Turn Passcode On. (Do not delete your saved finger prints.)

This worked for me. Auto Lock works once more.

I have a related problem. The update changed my "Auto-Lock" setting to 30 seconds (too short!) then ghosted the slider in "Displays and Brightness" so I can't change it back. I've tried the suggestions re: Passcode and restarting several times.

This cleared up after recharging. I wonder if it is related to "Low Power Mode?"

Thanks!!!