I had a perfectly functioning iPhone 5S 64gb running 7.1.2.
Curiosity got the best of me that it was time to update to 9.3 as apps in the store frequently prompt 'You must have iOS 9 to download this purchase'...
I learned a very hard lesson, yet again to never update until months after Apple launches a new iOS.
Used an iMac to attempt to recover, I get an error 50.
Used a Dell XPS to attempt to recover, I get an error -1.
Tried all kinds of methods: recovery mode, dfu mode, different usb cables, usb 3.0 port, usb 2.0 port, etc.
Set a reservation to the Genius Bar, they couldn't do anything about it. Since it was out of warranty, they had the audacity to suggest replacing it for $269 out of pocket.
And because this was a software caused fault such that it no longer boots fully into the springboard dash, they cannot accept it as a valid trade-in of full trade in value cost.
Good thing I had my data backed up, but this iOS 9.3 clusterfuck has caused me an entire week of grief already.
I just feel bad for the other people who weren't as fortunate as myself who are trapped from the data locked within their phones. Worse yet, if they didn't back up their data before the update, all the pictures and memories stored within... lost.
Good job, Apple. What you once touted as promoting an awesome end user experience has taken a complete 180 deg. turn with this latest fiasco.