Rumors have emerged (again) in recent days that Apple is prepping a 5G foldable iPhone for the US market in perhaps 2022 or 2023.

Stories say it is a 7-inch prototype screen that could fold in or out, like a Samsung Fold or Moto Razr reboot.

Apple's dilemma is to make it bigger than iPhone but smaller than iPad. Create a category of mobile device between those two. And at a reasonable price.

That is no easy task.