Apple just released iOS 9, but you might run into some issues if you’re trying to download it right now.
Of all the devices we’re able to test on, each one eventually fails while downloading iOS 9. That includes iPads, the iPhone 6, the iPhone 6 Plus and the iPhone 5s. It also happened on devices TechnoBuffalo has tested around the country, which means it doesn’t appear to be a localized server problem.
It’s possible Apple’s servers are slammed, or maybe there’s something bigger here. We’ll let you know if this bug works itself out soon. Otherwise, rest in comfort knowing you’re not alone.
Update: The download should work using iTunes.
Update 2: It appears that the over-the-air update is now working properly.