I upgraded my iPhone to iOS 9.3. That worked just fine. Activated fine. I then upgraded my iPad 4th gen to iOS 9.3 and when I tried to put in the Apple ID that was used to set up the iPad, isee there that the iPad is currently linked to a different email address. This is strange as the iPad has never been linked to another email address apart from the same one as the iPhone (ie my itunes account email). This is very strange indeed. All of a sudden I can't activate the iPad. It says the iPad is linked to firstname.lastname@example.org. I just don't know what to do about it. Would this be require a call to the Apple custimer service department to see what can be done about this? When I put in my icloud email address to activate the iPad it says incorrect Apple ID. I am a loss as what to do about this. Does anyone know anything that can be done about this?