Apple's first foldable iPhone is reportedly facing another production stall – this time not due to the hinge. A report from China points to problems in the SMT pre-production process. The fall launch is still considered a certainty for now.
Just days after reports surfaced about flawed hinge stress tests, another production update for the iPhone Ultra has emerged – this time focusing on a completely different issue. Weibo-based leaker Fixed Focus Digital has identified a different weakness: the so-called Surface Mount Technology in pre-production. While the picture of all previous leaks and specifications for the iPhone Ultra is becoming increasingly clear, an unusually large number of warning signs are accumulating around mass production.
Prefabrication as a new bottleneck
Surface-mount technology, or SMT for short, describes the automated placement of components onto printed circuit boards – a very early step in device manufacturing, long before final assembly. According to Fixed Focus Digital, this is precisely where Apple is currently struggling with low yields. In other words, too many of the pre-assembled modules are not meeting the required quality standards.
The leaker's assessment is cautious. The situation is described as concerning, without implying any threat to the planned fall launch. This is an important nuance, as production difficulties in pre-production can generally be resolved as long as sufficient time remains between the ramp-up phase and the market launch.
The hinge is not the problem this time
On May 18th, another Weibo leaker, Instant Digital, painted a completely different picture. According to him, Apple's hinge had repeatedly failed in stress tests involving frequent opening and closing – a point that, according to the report, had to be resolved "with absolute perfection." Shortly afterward, the same leaker downplayed the issue, stating that these problems would likely not jeopardize the expected market launch.
Fixed Focus Digital now draws a clear line: The current bottleneck has nothing to do with the hinge. Instead, the electronics manufacturing is the sticking point. Together, the two reports paint a contradictory, yet quite typical picture for a completely new Apple product category – fine-tuning is required in several areas simultaneously.
Delays have been ongoing since spring
This latest report joins a series of regular updates from the supply chain since spring. DigiTimes reported in April that production was about one to two months behind schedule, but that mass production was still expected to begin in July. Fixed Focus Digital itself also pointed to ongoing price negotiations between Apple and its assembly partner as a potential source of disruption.
These reports fit into the overall picture that is now emerging surrounding the tense production and quantity planning of the iPhone Ultra: According to several sources, the launch remains set, but the initially available quantities are likely to be smaller than is usual for other iPhone models.
September start remains the consensus
Despite the growing list of production issues, Bloomberg's Mark Gurman is sticking to his prediction. According to Gurman, the iPhone Ultra remains on track for a September launch, alongside the iPhone 18 Pro. His assessment aligns with the line recently taken by DigiTimes and Instant Digital, despite the reported problems.
Foxconn's website also suggests that Apple is generally sticking to its schedule. According to reports, test production of the iPhone Ultra at Foxconn has already begun, a few months ahead of the originally planned start of mass production in the summer.
Why the SMT phase is particularly critical
Producing a foldable device is significantly more complex than producing a traditional iPhone. More components, thinner circuit boards, and limited space – all of this places extremely high demands on the assembly machines. Even minor tolerance deviations can lead to entire pre-production modules having to be rejected.
This is precisely why low SMT yield is considered a typical stumbling block for very new products. Apple can take two approaches here: further optimize the manufacturing parameters or start production with higher reject rates and adjust accordingly over time. For the first buyers, both approaches would feel similar – however, when ordering, they would notice how limited the available supply is.
Unusual increase in supply chain reports
It's striking that production updates for the iPhone Ultra are currently pouring in from several independent sources practically every week. This is unusual – with most iPhone models, such clusters of updates only occur in the final weeks before mass production. For the first foldable phone, this phase seems to be stretching over months, with a constant stream of new, minor issues emerging from different production stages.
Final clarity is unlikely until summer. If mass production is indeed slated to begin in July, the first near-production components should appear in the supply chain within the coming weeks. Until then, the iPhone Ultra remains a product whose launch represents more than a typical iPhone release – a logistical test for Apple's supply chain. (Image: Shutterstock / Gorodenkoff)
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