This is for final/release. I have an iPad Air running 9.2.1 that was powered-down/restarted and is able to connect to the internet via Safari. The update's available in Settings => General => Software Update. Retried a few times over the last 18 hours, but get the same result each time; (after touching "Install Now") it shows the following error:
"Unable to Verify Update
iOS 9.3 failed verification because youare no longer connected to the Internet"
Any suggestions?