Apple Inc. on Wednesday unveiled its first foldable iPhone model, called Duo, breaking with its single-screen smartphone design used for many years.The new model has a larger inner display, as well as an outer display that can still be used when the phone is folded shut. It has a starting price of $1,999, with pre-orders beginning Oct. 16 and the product set to be available from Oct. 23.In Japan, it will go for 364,800 yen and up.With a foldable model on the market, Apple will compete in the luxury smartphone segment against its rivals Samsung and Google, which have already put out comparab…READ FULL ARTICLE