Apple will unveil its foldable iPhone Ultra next week at the September event, but exact shipping timing remains unclear. The iPhone 18 Pro and Pro Max are expected to go on sale later that week ahead of wide availability on September 18. While iPhone Ultra will be announced at the same event, it is still uncertain if the foldable model will ship to users simultaneously with the Pro models.

Recent reporting is optimistic that the device will ship in September, albeit with limited supply. Earlier this month, Weibo leaker Fixed Focus Digital said supply will be "extremely limited" at launch, but per his sources in the supply chain, there is no evidence of a delay past September. A July report in Cailian News Agency referenced conversations with Apple supply chain sources who said there was no change in the delivery date in September, denying rumors of product postponement.

Channel News Australia was another recent source saying the device would be available in September, at least in the US. Looking further back, Ming Chi-Kuo predicted earlier in the summer that iPhone Ultra will follow a similar strategy to the iPhone X in 2017, meaning it could be announced in September but ship later in the fall. Mark Gurman at Bloomberg refuted delays, saying the device was still "on track" for September.

In summary, recent reporting indicates iPhone Ultra will ship in September with very limited availability, but early adopters should be able to buy it soon.