Do Not Disturb keeps switching on unexpectedly on iPhone 17 Pro Max

To fix Do Not Disturb turning on unexpectedly on your iPhone 17 Pro Max, you likely need to address a locked Lock Screen link or an iCloud sync glitch. Since you recently updated to iOS 26.6.1, certain settings may have become corrupted or stuck.

Try this

Lock your iPhone, then wake up the screen.

Press and hold your finger on the Lock Screen for 1–2 seconds until the wallpaper gallery opens.

Look at the bottom of your active wallpaper. If it says Do Not Disturb (or shows a crescent moon icon), tap it.

Tap the selected Focus mode again to unlink it from that wallpaper entirely.

cindym19721 wrote:

I don’t have that option. I assume it would be in the DND settings? I did a search for it in the settings and it’s nowhere on my phone

Settings>Focus>Do Not Disturb>Smart Activation

Did you not turn off "Smart Activation" in DND settings?

cindym19721 wrote:

Ok, thanks. Still doesn't explain why it keeps randomly turning on. Although admittedly I haven't noticed it do it since I installed iOS26.6.1. Maybe it was an issue that got fixed in that update?

Hopefully, it was something that was fixed by updating.

I would point out that, in the past, having a focus linked to a custom screen has caused problems for some people. Not only does enabling the focus switch to that screen, but apparently, switching to that screen manually can trigger the focus. I don't have enough data to know if that was intentional or a bug.

That means you do not have it enabled. You can see what it looks like by tapping "Add Schedule." You'll see the options to add Time, Location, App, or at the bottom, "Smart Activation."

You can turn it on and off using Siri.

I hope it behaves for you from now on!