It really ****** me off that Apple disciples think that it's just fine that the suggested solution from Apple to a problem is simply restoring your top-dollar product to factory defaults and spending the better part of a day in the process.
Does it not annoy you that Apple apparently have not performed the slightest in-house testing of IOS 9 prior to releasing it to their loyal customers??
As far as I am concerned Apple are no longer any better than the Android programming crowd - "hurry, hurry hurry, let's get the next new thing out there so that we get ahead of our competition - screw testing - let the millions of customers figure out how it works".
It should really be Apples problem. My advice is to take your malfunctioning product in to one of those churches with the blue shirt flunkees and let them fix it on their clock - not yours. If your car was returned with the wrong fuel in the tank after a service and it didn't start - would you say "that's ok - I'll drain the tank and fix it myself?"
I am definitively through with Apple..
Regards,
Private pilot who lost use of his useful navigational aid today due to unsuccessful IOS upgrade on Ipad.