Rumors about the book-style iPhone Fold launching later this year have been circulating for a few months. But now, the latest report suggests Apple may be thinking even smaller — and more compact. Bloomberg's Mark Gurman reports that Apple is considering a "square-cornered clamshell-style iPhone," and the company is currently testing and researching this form factor in its labs. Gurman stopped short of revealing any details about when an iPhone Flip would launch or what specs it would include. Whether it ever reaches the market remains uncertain. Apple would likely first test the waters with the book-style iPhone Fold and gauge consumer response before committing to a flip model. Rumors about a clamshell foldable iPhone have actually been circulating for years. Earlier reports even suggested Apple had two separate prototypes in development. Some had predicted a Flip model might actually launch before the Fold. A DIY video published about three years ago even showed what a prototype foldable clamshell iPhone might look like. Ref: gsmarena