I just installed iOS 9 on my iPad Mini (1st gen, Wifi) and got a popup notification as soon as I hit the home screen. Except I was tapping on something else as it popped up and managed to hit 'Not Now' on the popup; I have no idea what it was. I know it's a long shot, but I was wondering if anyone remembers what it was. I don't remember it appearing on my iPhone. It was a popup message maybe 5 lines long, and had a 'Not Now' option, as well as an 'Update' (I think) option. Thanks.