It's getting harder and harder to avoid, though. Every single day, my iPhone pops up a box asking if I want to upgrade to the latest 9.whatever. It does this i

It's getting harder and harder to avoid, though. Every single day, my iPhone pops up a box asking if I want to upgrade to the latest 9.whatever. It does this in the morning, when I'm tired... or at other seemingly-random times of the day. It offers 3 options: "Install Now", "Install Tonight", and "Ask me Later". There is no "Stop asking me" option. One of these days I will slip up and hit Install Now, and probably lose the use of my phone for the next hour.