Samsung, too, has patented a double-folding smartphone

This patent describes a double-folding smartphone from Samsung featuring a large flexible screen and two hinges for a Z-fold.

Double-folding smartphone patented by LG

LG has been avoiding the foldable topic for the past year, but it might jump straight to a double-folding smartphone, as this patent filing reveals.
Huawei foldable smartphone

Huawei foldable smartphone patent suggests double fold approach

A recently uncovered patent suggests Huawei is working on a foldable smartphone approach that is double-folding and wraps around.