Samsung Electronics is shifting roughly 10% of its planned September component production for the Galaxy Z Fold 8 into October after a shortage of display driver ICs, or DDIs (chips controlling screen pixels), limited supply for the passport-style foldable. Samsung’s System LSI division designs the DDI, while Taiwan’s UMC manufactures it on a 22-nanometer process. Demand has exceeded Samsung’s internal projections since the phone was unveiled in late July. Samsung sought UMC’s fastest wafer-processing tier, known as a super hot run, but UMC’s fully utilized 22nm line could not rearrange production for other customers. Samsung will receive its originally planned volume under its normal-run arrangement and has redirected inventory reserved for next year’s product development into current production. Industry officials expect the bottleneck to ease as launch demand cools through October, shifting the deferred revenue into the fourth quarter. The supply issue comes as Apple prepares to launch the iPhone Duo, its first foldable, with preorders beginning October 16 and retail availability on October 23. South Korean retail data showed Z Fold 8 sales rose 10% in the week after Apple’s September 9 unveiling. Samsung’s phone starts at roughly $1,550, compared with $1,999 in the US and approximately $2,390 in South Korea for the iPhone Duo. The Z Fold 8 is thinner and lighter, while Apple offers stronger dust and water resistance and higher charging capacity. Samsung retains advantages in multitasking, external-display support and a physical SIM slot. Analysts have offered mixed views of Apple’s positioning, though Neil Shah of Counterpoint Research expects close to 6 million iPhone Duo sales by year-end, equal to roughly a quarter of the global foldable market. IDC expects foldables to represent less than 3% of smartphone sales in 2026. Samsung, which shipped its first foldable in 2019 and holds about 40% of the market, said the Fold 8 and Fold 8 Ultra outsold the Fold 7 by 30% in their first month. The immediate constraint appears manageable, but Samsung’s ability to sustain momentum after Apple’s retail launch remains the broader test.