Apple’s long-rumored foldable iPhone appears to be moving closer to reality. Fresh information shared on Weibo claims the company has selected a liquid-metal hinge design for its first foldable device, which observers increasingly refer to as the “iPhone Ultra.”
The latest details suggest development is progressing at a steady pace despite manufacturing challenges. According to the leak, prototype units have already been distributed to carriers worldwide for testing, a step that typically indicates a product has entered a more advanced phase of validation ahead of launch.
The hinge could be one of the most technically ambitious parts of the device.
A liquid metal hinge would differ from conventional stainless steel or aluminum mechanisms commonly used in foldable smartphones today. The material is known for its high strength, durability, and resistance to deformation, characteristics that could help Apple address one of the biggest challenges facing foldables: long-term reliability.
Foldable displays place significant stress on hinge assemblies through thousands of opening and closing cycles. If the report is accurate, Apple may be using the liquid metal solution to improve structural rigidity while reducing wear over time.
The leak also points to another unusual hardware feature. Apple’s foldable reportedly features a vapor chamber cooling system, a technology commonly found in high-performance Android smartphones but not yet used in iPhones.
Vapor chambers spread heat across a larger surface area than traditional cooling methods, helping processors sustain peak performance for longer periods. In real-world use, this could benefit gaming, AI workloads, video editing, and other demanding tasks. The source claims the cooling performance demonstrated by current prototypes is particularly strong, suggesting Apple may be preparing for more aggressive thermal requirements than those found in existing iPhone models.
Production challenges remain
Despite the apparent progress, the report notes that the device’s pre-assembly process is under pressure. Early-stage production units are reportedly experiencing ramp-up difficulties, a common issue for products that introduce new manufacturing techniques or complex component designs.
That alone is not unusual. Foldable smartphones remain among the most difficult consumer electronics products to manufacture at scale, requiring precise alignment between the display, hinge, chassis, and protective layers.
Still, the fact that carrier testing is reportedly underway indicates Apple may be working through those issues while keeping development on schedule.
September launch still rumored
The Weibo source suggests the project remains on track for a September debut, although that timeline remains unconfirmed. Previous reports have pointed to a late-2026 or 2027 arrival for Apple’s first foldable iPhone, so launch timing remains one of the biggest unanswered questions.
If Apple does unveil a foldable iPhone in the near term, the combination of a liquid-metal hinge, vapor-chamber cooling, and the company’s typical focus on hardware integration could help set it apart from existing foldable devices from Samsung, Honor, Oppo, and others.
Pricing may ultimately be the more important story. Advanced hinge materials, complex display technology, and new thermal systems are unlikely to come cheap, raising questions about where Apple’s first foldable would sit within an already premium iPhone lineup.
