While the long-awaited foldable iPhone has often been referred to as the iPhone Ultra or the iPhone Fold in rumors, another name making the rounds is iPhone Duo.
There is no actual evidence that Apple will use the iPhone Duo name, but it is certainly a possibility. Apple has used Duo branding in the past, for its PowerBook Duo line of laptops in the 1990s and for its MagSafe Duo Charger in the early 2020s.
In this case, Duo would refer to the foldable iPhone's dual screens.
Microsoft released a dual-screen Android smartphone called the Surface Duo in 2020 that has since been discontinued, and perhaps Apple will want to avoid using Duo branding for that reason. However, competing companies have devices with Ultra and Fold branding too, such as Samsung's Galaxy S26 Ultra and Galaxy Z Fold8.
Apple has used Ultra branding for the Apple Watch Ultra, CarPlay Ultra, and its M1 Ultra, M2 Ultra, M3 Ultra, and M5 Ultra chips.
In April, former Macworld reporter Filipe Espósito cited a source familiar with Apple's plans who said the foldable iPhone will indeed be named iPhone Ultra. Bloomberg's Mark Gurman said many Apple employees refer to the device as the iPhone Ultra within the company, but he has never firmly reported that it will be the official name.
Apple is expected to unveil its foldable iPhone during its event next week, so we will soon find out whether the device is named iPhone Ultra, iPhone Fold, iPhone Duo, or something else. Share your own guesses in the comments section.
