iOS 9.3 update failure
iPhone 9.3 update fails at verification step saying iPhone is not connected to the internet. My iTunes client on my PC says version 9.2.1 is up to date. I'm not sure if 9.3 is truly available or not. And if it is, the update fails every time with the not connected message. I tried using wifi, wire and LTE, but all three say not connected. Of course I am connected since all my apps are working including social media, email, browser.
iPhone 5s, iOS 9.2.1