Apple’s first foldable smartphone, the iPhone Duo, appears to be struggling to secure stable production volumes ahead of preorders opening on October 16. According to supply chain reports, final assembly yields remain only marginally above 60%.
Key takeaways
As of September 17, final assembly yields were reportedly only slightly above 60%.
Display and hinge manufacturing challenges could constrain initial supply
Analyst cuts 2026 shipment forecast by 14%, from 7 million to 6 million units
iPhone Duo Production Status
MacRumors reported on September 29, citing Chinese outlet **Jiemian News**, that the final assembly yield for the iPhone Duo at major contract manufacturer **Foxconn** was barely above 60% as of September 17. A source familiar with the supply chain estimated that “it could take at least another six months to as long as a year to reach mature yields while maintaining Apple’s current quality standards.”
According to the report, Foxconn has been continually adjusting its equipment, assembly processes, and production conditions as it scales up mass production.
Jiemian News noted that lower yields, delivery delays, and design changes affecting Samsung Display’s foldable OLED panels and hinge components had reduced the time available to fine-tune the finished-product assembly process. Suppliers are reportedly watching closely to see whether Apple will relax some of its quality standards to increase production.
In a separate article, Chinese tech outlet MyDrivers reported that one contract manufacturer had asked Apple to decide whether to prioritize “increasing volume” or “stabilizing yields.” The explanation was that aggressively ramping up production could sharply increase defective units and scrap costs. Apple has said that the iPhone Duo hinge uses more than 100 components and 3D-printed covers, while Jiemian News reported that Apple had revisited a design based on Liquid Metal that it had previously considered.
Another supply chain source cited by Jiemian News said Apple is targeting initial global inventory of 6 million to 8 million units for 2026. A distribution industry contact added that Apple’s internal sales guidance exceeds 5 million units. The outlet compared this figure with the 20 million to 30 million units a typical single iPhone Pro model ships over its entire product life cycle, and said the iPhone Duo is expected to launch as a relatively small niche product.
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Jeff Pu Lowers His Forecast
In a report dated September 15, cited by **9to5Mac**, analyst **Jeff Pu** lowered his forecast for iPhone Duo shipments in 2026 from 7 million to 6 million units. He stressed that the revision was due not to weak demand but to “hinge constraints,” heightening concerns that production capacity could limit initial shipments.
In the same report, Pu forecast combined shipments of 72 million iPhone 18 Pro and Pro Max units in 2026—12 times his forecast for the foldable iPhone Duo.
This comparison underscores the iPhone Duo’s relatively small production scale, but it does not determine whether the product will actually sell out. Real-world supply and demand in the early market are expected to depend on how many units Apple can supply and how much consumer orders grow.
Apple unveiled the iPhone Duo on September 9, pricing it from $1,999 in the U.S. It is Apple’s first foldable smartphone, with a form factor that opens from a 5.4-inch outer display into a 7.6-inch inner screen. According to the official schedule, preorders were set to begin on October 16, with general sales starting October 23—a timeline established before recent concerns about production pace emerged.
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