iPhone Duo has the largest display ever in an iPhone, bigger even than iPhone 18 Pro Max. A side-by-side video on Instagram by @thetechchap offers a great look at how the two models compare in size.
According to Apple's specs, iPhone Duo measures 4.64 inches closed and 6.43 inches open in height, with a width of 3.31 inches closed and 6.48 inches open. iPhone 18 Pro Max is 6.43 inches tall and 3.07 inches wide.
When unfolded, iPhone Duo's width is nearly identical to iPhone 18 Pro Max's longest side. In a certain orientation, their length is nearly identical, but the Duo has a more spacious 4.64-inch height compared to iPhone 18 Pro Max's 3.07-inch width. The Duo can also be folded for compact carrying and one-handed use.
What do you think of the size differences? Let us know in the comments.
Source: 9to5Mac · Summarized by HeadlinesBriefing