If that happens to be the case for you, you've still got a window to downgrade back to i OS 9.3.5, the last version of i OS 9—but that window isn't quite known yet.
It could be days or even weeks before they stop signing i OS 9.3.5, so if you want to downgrade, you've got to do it quickly.
But, if you'd like to verify, connect your i Pad, i Phone, or i Pod touch to your computer, then check the section in i Tunes to view your backups.
There are two different methods that you can use to revert your firmware back to i OS 9.3.5.
This first one is preferred, as it preserves all of your existing data and apps, so there's minimal downtime. However, there is a slight risk that you'll experience a few bugs after downgrading with this method, so then you'll want to either perform a full factory reset or try the second method at the bottom of this article, which will erase your data, but fix any minor quirks.
Once you get back up, you'll simply need to accept the terms of service again, then you'll be all set and ready to go.
However, if you are apart of the public beta program and have a beta profile installed, you'll want to remove that now, since you no longer need it.