Personally, I see this as the best foldable design...
https://www.networkworld.com/articl...warded-patent-for-multiple-folding-phone.html
Of course, the major hurdle is making each panel thin enough for pocketability, so it’s a design for a few generations from now.

https://www.networkworld.com/articl...warded-patent-for-multiple-folding-phone.html
Of course, the major hurdle is making each panel thin enough for pocketability, so it’s a design for a few generations from now.