I downloaded the ipsw from the developer portal (I wasn't beta testing) and tried to install via iTunes and received an error 14.
Do I need to install XCode 8 or is there a way to get out of this?
My phone is stuck in recovery mode.
yap your phone is brick now.. you have to restore back to iOS 9.3.5 then use the mobileconfig to update to ios 10..
or if you are on a mac, download xcode 8 and then do the restore to iOS 10.