One of the nice new features of iOS 9 is that your iPhone will automatically download the latest iOS updates without interfering with anything else you're doing. Then it will ask you politely if you'd like to install it. But what if you're busy? It'll ask again. And again, and again, incessantly until you allow it to install it. What if you want it to stop? Is there a way to turn off update remidners and just wait until you are ready?