https://finance.yahoo.com/news/weirdest-gadets-mwc-2019-171004097.html

V50 ThinQ 5G smartphone. This Dual Screen add-on attaches like a regular case but also draws power and a video signal from three connectors on the side of the V50. Tap a small onscreen button to turn on that extra 6.2-inch display and start using it to view an extra app or as a touchscreen controller for a game. If you do, though, you may want to have a charger handy. I imagine running a second display will do a number on the V50’s battery." data-reactid="61">LG found a novel way to tap into the newfound interest in foldable phones: an optional second screen you can attach to its upcoming V50 ThinQ 5G smartphone. This Dual Screen add-on attaches like a regular case but also draws power and a video signal from three connectors on the side of the V50. Tap a small onscreen button to turn on that extra 6.2-inch display and start using it to view an extra app or as a touchscreen controller for a game. If you do, though, you may want to have a charger handy. I imagine running a second display will do a number on the V50’s battery.

Sony’s Xperia 1 offers a resolution of 1,644 x 3,840 pixels, matching the horizontal resolution of a 4K screen. That’s unparalleled in a phone. It’s also pretty much useless, since human retinas have no hope of making out all that extra resolution from any normal viewing distance. The Xperia 1’s HDR color—brighter and deeper than on average phones—makes for a better selling point, but that may not be enough to overcome a price that, while unannounced, seems likely to be on the high side. And have I mentioned that I don’t like phones without headphone jacks?" data-reactid="67">The 6.5-inch display on Sony’s Xperia 1 offers a resolution of 1,644 x 3,840 pixels, matching the horizontal resolution of a 4K screen. That’s unparalleled in a phone. It’s also pretty much useless, since human retinas have no hope of making out all that extra resolution from any normal viewing distance. The Xperia 1’s HDR color—brighter and deeper than on average phones—makes for a better selling point, but that may not be enough to overcome a price that, while unannounced, seems likely to be on the high side. And have I mentioned that I don’t like phones without headphone jacks?