Blogger Kang posted a video highlighting that the iPhone Duo demo unit exhibits a relatively soft feel in its crease area, with visible water ripples appearing when swiped. In contrast, other areas of the device feel much like a traditional bar-style phone. This observation has sparked online discussions about the durability of the foldable screen's crease and surface materials. Some experts suggest that this design may aim to enhance cushioning, allowing the screen to relieve contraction stress under varying temperature conditions. Additionally, this feature is limited to the area above the hinge and has minimal impact on everyday use. However, it also puts the durability of the surface polymer adhesive layer to the test. If the material is not hard enough, it may leave marks after prolonged use. So far, only demo units have been tested, and it remains to be seen whether mass-produced models have undergone optimizations, a fact that can only be confirmed through real-world testing post-launch. Some netizens point out that Android manufacturers started exploring foldable screens as early as 2019, making Apple's entry seven years late. Its first-generation products still need to undergo rigorous market testing in terms of materials, structure, and craftsmanship. The iPhone Duo is set to be officially released on October 23rd, with a starting price of 15,999 yuan. Currently, pre-orders on the official website are booked until January next year, and only customers who pre-order on the official website can collect their devices at retail stores during the initial sales phase. Due to production constraints, Apple has adopted a globally unified quota allocation strategy, resulting in very limited initial stock in each market. Price hikes by scalpers are expected during the initial sales period, so dealers advise consumers against purchasing at inflated prices. According to a report by a third-party research institution, the annual stocking volume of the iPhone Duo is projected to be 6 million units, significantly lower than the tens of millions of units shipped by the iPhone 18 Pro series.