System updates are a good thing usually, but not for everyone all the time. Maybe you've got some mods that you don't want to break or you've heard about some nasty bugs in a new build that you want to avoid. The Android N developer preview lets you block updates in the event you don't want them.

This toggle is in Developer Options, so you'll have to enable that menu to access it. The toggle is near the top, called "Automatic system updates." If you turn it off, your phone will not download OTAs by itself, but it's unclear if that means you won't see the notification at all either. We can't say if this is a real feature of Android N, or just something for the developer preview. You could certainly imagine scenarios where blocking OTAs might be desirable if you're actually using the developer preview to develop things. But the final version?

We've reached out to Google to ask if this toggle will be included in the final release, but just got a generic, "We'll share more info later." Don't get too attached to it, but at least in the dev preview, you can block those automatic updates.