When trying to upgrade to 9.3.1, the terms of service come up for the upgrade, and when clicking agree (twice -- there's two popups about agreeing), I'm redirected to the home screen and nothing else happens. Note: I had this problem with 9.3, and at the time, the 9.3 update was not signed, but as of today, IPSW says this device's update is signed and available, yet the problem remains, even after a restart.
A power cable is attached to the device (with ~80% life). I also tried closing all open applications. Still same result.
Any ideas on how to get the update installed?