The iPhone Duo Will Run iOS 27.1 at Launch in October

Apple told CNET in an email that when the tech giant launches the iPhone Duo on Oct. 23, the upcoming foldable will launch with iOS 27. 1, skipping right past iOS 27 . “When iPhone Duo first becomes available on October 23, it will run iOS 27. 1,” Apple said. “This version of iOS builds on the foundation of iOS 27 but introduces features that were purpose-built for the new foldable design