That’s a very tall phone.
Sony seems to be nearing the release of a phone designed for cinema buffs. New images of the Xperia XA3 posted by WinFuture reveal an ultra-wide display with a 21:9 aspect ratio. We’ve seen a wave of 18:9 smartphones in recent years, but Sony is going for an even more drastic tall and thin device. A 21:9 aspect ratio would be a match for many of today’s major films, so you’d be able to watch them on the XA3 without having to deal with black bars on the sides or at the top and bottom. But all non-cinema content would have the bars at the sides, so there’s a trade-off for that immersion when streaming movies.