13 April 2021 / 23:46BST Sony’s new Xperia 1 III flagship phone has a world first 4K HDR OLED 120Hz display, it’ll upscale digitally zoomed snaps so they don’t look as naff, and turn your boring 2-channel stereo streamed songs into sexy, spatial 360-degree audio. That’s the plan, anyway. Along with its equally buff (but not so big) Xperia 5 III, the home of Bravia TVs, Alpha cameras, the Walkman, Hi-Res Audio and PlayStation has launched two mobiles it claims carries the company’s full technological and creative arsenal. There’s an awful lot to get through so pay attention as we spell out the five things you need to know about the new Sony Xperia 1 III and 5 III – other than the now familiar 21:9 aspect ratio displays that make them the cellular equivalents of a Milky Bar.