

Android was initially developed by some other company, that Google acquired when it decided it wanted to do smartphones. The alternate universe that I see is they pick a different company instead, and things play out about like before. Maemo (Nokia product) unfortunately died before its time, but maybe it could have been where Android is now. PalmOS and maybe others also might have been viable. Dunno about the Blackberry OS. Windows Mobile (spawn of Windows CE, I think) always stunk.
A buddy of mine has a foldable Samsung and likes it. IDK what model but it’s big, looks like a full sized phone when folded, and opens out into something with 2x the screen space of a normal phone, basically a mini tablet.
I had a number of flip phones in the old days and they all broke at the hinge. So there’s that.