A leaked mock-up of a potential foldable iPhone 18 Ultra has surfaced via YouTuber Lewis Hilsenteger. The device,reportedly sourced from China, features a book-style design ahead of Apple's September 9 event.

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Volume buttons on top and a book-style fold

The leaked mock-up reveals a device that opens like a book, featuring a large internal screen and a dual-camera setup on the rear. According to the report, the device sports a matte white finish with a contrasting shiny Apple logo. One of the most striking changes is the relocation of the volume buttons from the side of the chassis to the top edge.. While the Action Button and unlock mechanism appear to remain on the side, this new button configuration has already drawn criticism from viewers in the video's comment section.

The physical dimensions of the device suggest a significant departure from current smartphone proportions. The foldable appears to feature a straight edge along the crease and a curved outer edge. When opened, the device reveals a large main screen that is wider than it is tall, creating a tablet-like experience. This shift toward larger, foldable displays represents a major change in the hardware language Apple has used for its standard iPhone lineup.

John Ternus's hardware-first era begins September 9

This potential hardware pivot arrives at a critical juncture for Apple's leadership . The company is preparing for a September 9 launch event that marks the transition of the CEO role from Tim Cook to John Ternus. As the report notes, Ternus is widely recognized as Apple's "product guy" with a specific interest in advancing hardware capabilities. This leadership change could signal a more aggressive approach to experimental form factors, such as the foldable technology seen in the iPhone 18 Ultra mock-up.

The transition from Tim Cook to John Ternus may influence how Apple approaches the highly competitive foldable market. While Cook's tenure focused heavily on ecosystem stability and services , Ternus's reputation suggests a potential return to hardware-centric innovation. If the iPhone 18 Ultra is indeed part of the upcoming product roadmap,it would represent a bold statement of intent from the new leadership.

The accuracy of the unnamed Chinese supply chain

The origins of this leak trace back to an unnamed source in China, a region that has increasingly become a hub for high-accuracy hardware leaks. Lewis Hilsenteger noted in his video that the components being sent out of China are appearing more like finished consumer products than previous iterations. This trend of high-fidelity leaks has led some enthusiasts to believe the iPhone 18 Ultra's design is a reliable preview of Apple's future direction.

The community response to the Unbox Therapy video has been intense, with the footage garnering nearly two million views. Many viewers have expressed skepticism or excitement regarding the design, particularly the placement of the volume buttons.. However, the increasing sophistication of these Chinese-sourced mock-ups suggests that the gap between leaked prototypes and final retail products is narrowing.

The unpowered mock-up's missing internal specs

Several critical questions remain regarding the actual functionality of the iPhone 18 Ultra. Because the mock-up shown by Lewis Hilsenteger does not turn on, the software experience and internal processing power remain entirely speculative. Furthermore, while the video shows a visible hinge, Hilsenteger himself cautioned that the final production model's hinge would likely be much less pronounced than the one seen in the prototype.

The lack of official confirmation leaves the specific details of the device in a state of uncertainty. It remains unclear if the dual-camera layout or the top-mounted volume buttons are permanent design choices or merely characteristics of this specific mock-up. until Apple provides an official statement, the true capabilities of the iPhone 18 Ultra remain unverified.