Apple's new foldable iPhone Duo, unveiled as the company's first foldable smartphone, features side-mounted controls and Touch ID that left-handed users argue could make the $1,999 device difficult or unusable without a dedicated left-handed mode. The device has a 7.6-inch inner screen and 5.4-inch outer screen, but its design optimized for right-hand operation has sparked criticism from the left-handed community, though accessibility features are built in.