Microsoft unveiled its big Windows Phone 8.1 update earlier today, and Nokia followed up with two new handsets running the software. The Lumia 630 is the first Windows Phone 8.1 device to use on-screen buttons, and Nokia’s Lumia 930 is the global version of the Lumia Icon. Both are designed for the latest Windows Phone 8.1 update, and will be available in the coming months. At a Nokia event in San Francisco I got a chance to get a closer look at both handsets.