Like when my sound volume stuffed up on my iPhone. There were no settings to recover it... Or when iTunes refused to copy music to my phone, but 3rd party tools would. As soon as iTunes was restarted, it deleted the good "newly added" tracks and corrupt them. My experience with Apple: it works most of the time, but when it doesn't, you're screwed because there's no setting to fix it. Good news: Apple added "reset settings", which would have solved my audio settings quickly.. Without this feature, it took me months to solve the problem. Btw, I LOVE the IOS7 control center !!