Being relatively new to learning the intrcasies of iPads, something I have noticed is that when the iOS system is upgraded, once it's done, you may find you have to keep an eye open for things that might have changed. In the twice I've experienced upgrading, after, I've found Bluetooth to be on, so that needed to be turned off. Then I had phone all asking why I wasn't responding to an incoming skype call when the ipad was in front of me. Those settings needed my attention. If anyone has discovered something similar, maybe you pass it on, in case I have overlooked something.