On October 11, Apple chief operating officer Sabih Khan arrived at Foxconn’s Zhengzhou Technology Park in Henan Province to assess the company’s readiness to mass‑produce the iPhone Duo, Apple’s first foldable smartphone. The visit came a day before the device’s pre‑order window opens, positioning the tour as a final checkpoint for a product that Apple hopes will expand its premium‑device portfolio.
Production Tour and Immediate Priorities
Khan was accompanied by Jiang Jiheng, the rotating chief executive officer of Foxconn Technology Group and general manager of its business group. Together they inspected several key lines: the dedicated iPhone Duo assembly line, the rear‑camera module line for the iPhone 18 Pro, an anodizing workshop that treats exterior frames, and a smart‑manufacturing workshop focused on surface sputtering of system‑on‑chip (SoC) components. Despite being a Sunday, the Zhengzhou campus operated at full capacity, reflecting the urgency of meeting both the iPhone 18 Pro launch schedule and the imminent iPhone Duo demand.
Khan described the Zhengzhou campus as “arguably the largest iPhone manufacturing facility, and perhaps the largest smartphone factory in the world.” He demonstrated the iPhone Duo’s folding mechanism on the spot, noting the smooth feel of the screen opening and closing and calling the device “one of Apple’s most challenging and exciting products to date.” In his remarks he emphasized the combination of “very strong manufacturing precision and design capability” achieved through close collaboration with suppliers, adding that the complex production process ultimately delivers a “simple and intuitive experience” to users.
Technical Challenges of Foldable Manufacturing
The chief engineering hurdle for a foldable phone lies in its hinge and the control of the screen crease. Foxconn disclosed that the iPhone Duo’s hinge incorporates more than 100 micro‑components, each of which must align precisely with counterpart parts from different supply‑chain segments. To meet this requirement, Apple and Foxconn re‑engineered the relevant processes and introduced customized automation.
One notable innovation is the use of confocal laser scanning to map the microscopic topography of the folding area layer by layer. The data feed a machine‑learning algorithm that generates dynamic filling solutions in real time. Those solutions are then applied via micron‑level 3D printing, which builds up to 25 layers of a photosensitive polymer coating to create a flat support substrate for the screen. Foxconn displayed video footage of the equipment in operation, though the internal workings of the machines were not disclosed publicly.
When pressed for specific production‑capacity numbers, Khan declined to provide figures, stating only that the team is “advancing manufacturing development” and scaling output to meet Apple’s “consistently high quality standards.” He added that the lines are “very busy, everyone is excited, and we want to get the product to customers around the world as quickly as possible.”
Supply Chain Enhancements and Market Outlook
Beyond the foldable hinge, the Zhengzhou plant showcased a broader push toward vertical integration. Foxconn demonstrated a physical vapor deposition (PVD) sputtering process applied to SoC chip surfaces, replacing traditional metal shielding covers. The technique reduces module thickness while improving thermal dissipation.
Jiang Jiheng explained that Foxconn is transitioning from its historic “world factory” role to a “technology manufacturing platform service provider.” The shift is anchored in two capabilities: AI‑driven manufacturing and deeper supply‑chain integration. The SoC sputtering effort is the first project of Henan Hongchuang Technology Co., Ltd., a joint venture between Foxconn and a state‑owned capital platform of the Zhengzhou Airport Economy Zone. Production of the sputtering line began in July and is already used in the iPhone 18 series, with an anticipated industrial scale value of 100 billion yuan.
Packaging also reflects the drive toward sustainability and precision. YUTO Packaging Technology, a Chinese supplier, opened a plant in Xuchang near Zhengzhou where each iPhone box undergoes 36 process steps. An intelligent optical‑inspection system co‑developed with Apple captures 64 high‑definition images in 1.9 seconds for comprehensive quality checks. A jointly developed water‑based coating has replaced plastic lamination, cutting plastic use by more than 3,000 tons annually.
Apple’s senior leadership presence in China extended beyond Khan. Executive chairman Tim Cook was also in the country during the same period, underscoring a concentrated inspection of the supply chain on the eve of iPhone Duo pre‑orders.
Market variables add uncertainty to the launch. The iPhone 18 Pro lineup, released just before the foldable, has faced quality complaints in South Korea, where users reported sudden shutdowns and restarts—dubbed the “panic full” phenomenon. Apple issued a software update targeting a forced‑restart issue linked to Face ID, yet reports persisted. Data obtained by a South Korean lawmaker indicated that between September 18 and 28 roughly 1,500 units were exchanged and about 50 refunds issued.
Demand pressure is also evident. Nikkei Asia, citing multiple supply‑chain sources, reported that Apple cut October component orders for the iPhone 18 Pro and Pro Max by at least 15 percent, with some suppliers seeing reductions as high as 20 percent. Analysts suggest similar order cuts could affect the iPhone Duo after launch, especially as memory‑chip costs rise and push device prices upward.
Pricing for Apple’s flagship devices has risen sharply. In the United States the iPhone 18 Pro’s starting price increased from $1,099 to $1,199, while the 1 TB model jumped from $1,499 to $1,799. The iPhone Duo’s starting prices are similarly elevated; Taiwan’s top‑tier 2 TB version is priced at NT$118,900 (about $3,700), the highest iPhone price ever recorded, and South Korea’s starting price of ₩3.29 million exceeds conventional flagship levels.
Pre‑orders for the iPhone Duo begin on October 16, with sales slated for October 23 in major markets such as Japan, Taiwan and the United States. The device enters a foldable market already occupied by Samsung Electronics, whose Galaxy Z Fold 8 launched in Japan on August 7.
Despite the market headwinds, Apple’s manufacturing investments continue unabated. From micron‑level hinge processing to pioneering SoC sputtering, from rigorous quality‑control systems to eco‑friendly packaging, the Zhengzhou ecosystem is in its final sprint toward scaled delivery of the iPhone Duo. Khan’s on‑site visit serves both as a confirmation of production capability and as a public signal of Apple’s confidence in its inaugural foldable offering.
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