If my iPad is dead/switched off, will I still get a FaceTime missed call notification if someone tries to ring me? If my iPad is out of battery/switched off when someone tries to FaceTime call me, will I get a missed call notification when I turn it back on? Because FaceTime uses WiFi, will the missed call be stored on Apple servers?
Yes, you'd be notified of the FaceTime call you missed while your iOS device was switched off.