Samsung announced an interesting dual display smartphone recently. Here's my take on the flip phone concept from a few years ago. I came up with a ball joint that allows the two displays to be oriented in the familiar clamshell and a new tablet mode.

Copy/Paste between Apps running on the displays would be useful while in clamshell mode. Tablet mode would span whatever is on screen across both displays.

 

Note the Android 1.x-sh incoming call screen on the upper display, lol. 

  

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