You Can No Longer Downgrade to iOS 9.3.4
If you decide that you don't like the iOS 9.3.5 update and its performance know that you can no longer downgrade to the iOS 9.3.4 update.
Apple's no longer signing off on iOS 9.3.2 or iOS 9.3.3. The company's also stopped signing on iOS 9.3.4 which means you can't drop back down to the older version of iOS 9.3 if you decide you don't like iOS 9.3.5's performance.
If you're interested about the process, take a look at our full walkthrough of the downgrade process right here. It'll help you get familiar for future updates.