Why Tim Cook Spent a Decade Building a Foldable iPhone

The Most Un-Tim-Cook Thing Tim Cook Has Ever Done

Tim Cook never pretended to be a product person. That was the gentlest criticism Steve Jobs leveled at him, and for fifteen years it stuck. While Jobs and Jony Ive shaped every curve and corner of Apple’s lineup, Cook managed supply chains and margins—quietly, efficiently, without fanfare. He made things available. He did not make them desirable by design.

So it is a genuine curveball that the most consequential product Apple is about to unveil appears to be Cook’s own obsession.

The iPhone Ultra, arriving September 9 under John Ternus’s nascent CEO reign, is the culmination of a decade-long campaign that began not in Cupertino but on the streets of Asia. According to Bloomberg, Cook witnessed foldable phones from Samsung and Huawei proliferating there in 2019—and decided Apple had no choice but to enter the category. The market was then tiny, measured in hundreds of thousands of units globally. He pushed anyway.

What makes this development striking is not just that Cook championed a product project but that he championed one so far outside Apple’s comfort zone. Foldables were the domain of Android manufacturers willing to absorb yield losses and bitter reviews. Apple, which has historically waited until a category matures before entering, was about to throw its full weight at something still considered experimental. Cook, the operations man, became the company’s most aggressive form-factor gambler.

The Patents Predate the Obsession

What makes this story richer is that Apple wasn’t idle before Cook took notice. The company filed a patent for a foldable, flexible iPhone as early as 2011, granted a decade later. By 2020, engineers were already exploring hinge mechanisms, flexible displays, and durability challenges that remain unsolved by any competitor. The internal archives at Apple contain designs from that period showing book-style foldables, slider configurations, and even wraparound forms that never went anywhere—until Cook started asking questions about them in 2021.

A competing internal project aimed at a foldable iPad—opening to roughly a twenty-inch screen—was still considered experimental as recently as April 2026. Apple’s foldable MacBook concept appears to have died entirely, casualties of a company that learned to say no to complex prototypes that couldn’t meet its tolerances. The phone was always the priority, but only after Cook redirected the teams toward it, consolidating scattered efforts into a single disciplined push.

One source told Bloomberg that Cook was the earliest and loudest champion inside the company. He had approved other projects over the years—the Vision Pro experience dated back five years—but this was different. He insisted. Resources flowed. The engineering became immense. Engineers assigned to the project describe a culture shift: what had been a side initiative suddenly received the staffing and budget normally reserved for annual iPhone refreshes.

Ternus Crosses the Finish Line

Cook’s influence is undeniable, but the credit for delivery belongs to someone else. John Ternus, head of hardware engineering, is said to have used his authority to push the project over the line. Ternus has spent his Apple career in the background—overseeing the design and production of the iPad, the MacBook Air, and the entry-level iPhones that keep Apple’s volume numbers resilient. He is not a charismatic figure. He is a competent one, and competence is exactly what a foldable hardware program requires.

When Ternus unveils the iPhone Ultra on September 9, it will be both a product launch and a quiet coronation—a first major declaration of independence as Cook’s successor. There is a Jobs parallel worth noting: the last product shaped meaningfully by Jobs took years to reach shelves after his involvement. The same patience will likely apply to Cook. Analysts project the Ultra may take five or six years to fully mature in Apple’s lineup, suggesting that the initial device is more proof of capability than a finished statement.

Ternus’s ascent also carries second-order implications for Apple’s internal power structure. Hardware engineering has long answered to Cook directly, and Ternus’s moment marks a subtle generational handoff. The engineers who grew up in the Cook era—less design-obsessed, more systems-thinking-oriented—are about to deliver Apple’s most ambitious hardware move in a decade.

What This Means for the Supply Chain

A foldable iPhone is not a marginal upgrade. It requires hinges, flexible OLED panels, ultra-thin glass, and new assembly techniques that existing iPhone supply chains cannot replicate without significant retooling. Samsung Display already dominates the foldable screen business, supplying nearly all of Samsung Electronics’ own devices and a growing share of Huawei’s. LG Display and BOE are chasing, but neither has matched Samsung’s yield rates on large-format foldable panels. Apple’s entry will force a scramble among display manufacturers and a reshuffling of component suppliers that could reshape the entire region’s electronics manufacturing ecosystem.

The financial impact is immediate. Foldable devices command premium prices, and Apple has historically priced its highest-tier products well above the mainstream. A successful Ultra could open a new revenue tier without cannibalizing existing iPhone sales—if the device holds up. It would also create a secondary market for repair and replacement parts that Apple has traditionally avoided in foldable categories, where repair economics are notoriously poor. If Apple brings its service infrastructure into the foldable segment with the same rigor it applies to standard devices, it could shift consumer expectations about foldable ownership cost.

Durability concerns around creases, dust ingress, and hinge wear plague the entire category. If Apple can solve those problems, it redefines what a foldable can be. If it cannot, the product risks becoming a niche curiosity. The supply chain implications extend beyond components: Apple is likely negotiating exclusive contracts or near-exclusive agreements with display manufacturers, which could temporarily squeeze competitors’ access to high-quality foldable panels and slow the broader Android foldable market.

The Bigger Picture: Apple’s Next Hardware Era

Cook’s foldable campaign reveals something about Apple’s current strategy. The company is past the point of low-hanging fruit in smartphones. Annual iterations of the same slab design yield diminishing returns. Wearables are growing but face their own plateaus. Spatial computing remains unresolved—expensive, heavy, and awaiting a killer application. A foldable iPhone is a bet that the form factor itself can still surprise consumers, that the phone’s two-dimensional dominance is not permanent, and that Apple can leverage its engineering depth to leapfrog a category its competitors have been refining for half a decade.

It is also a bet that Apple can absorb the complexity cost. Foldables have been profitable for Samsung but marginally so, weighed down by low yields and high repair rates. Apple’s combination of vertical integration, supplier leverage, and premium pricing could flip that equation—but only if the device ships on time and meets quality standards that justify the price tag. The risk is asymmetrical: failure damages a brand known for reliability, while success establishes a new benchmark that competitors will chase for years.

Cook’s tenure is defined by growth, discipline, and the steady expansion of Apple’s services ecosystem. The foldable iPhone adds a hardware chapter to that narrative—one that reframes him not as a manager who kept the lights on but as a leader who bet on a future his predecessor never envisioned. The iPhone Ultra is Cook’s last great product push, delivered just beyond his departure. It is also the first major test of Ternus’s leadership.

If they are right, the foldable iPhone stops being a category Samsung defined and becomes one Apple controls. If they are wrong, it becomes another expensive experiment in a lineup that usually avoids second-place products. Either way, September 9 will mark a turning point—not just for Apple’s hardware roadmap but for the broader smartphone industry, which has spent the last decade assuming the slab was the end state of mobile design.

The question is no longer whether Apple would eventually fold. It is whether the world is ready to be unfolded.