So, I've seen this question infrequently around the interwebs and never seen a reliable answer that anyone has proved out via experience or knowledge of the code: How often does iOS look for OS and/or appstore updates, so as to show the badge and tell you something is ready to download? As an experiment, I have not updated my phone to 5.1.1 yet and I haven't gone into settings to check. I also haven't plugged into the computer, but the phone DOES wifi-sync every night when I charge. I still see no update badge. Not jailbroken, FYI. I was kinda hoping it checked daily. Why would waiting up to 7 days (for example) make sense?