I want to stay at the current version of iOS 12 on my iPad Air 2 because i was just warned not to update to iPad OS 13 because of some glitch that causes the wifi to fail (appears to be an iPad Air 2 specific glitch) so i want to avoid it at all costs but the iPad keeps asking to update, How can i make it stop asking to update until i decide to update when a newer revised iPad firmware version comes out and how do i make the red "1" sign on the settings app disappear?