The iPhone Duo is eSIM-only worldwide, but so is every iPhone 16 and 17 sold in the US. Here is what to test with your carrier and in Intune before October, and where the tooling is thinner than you would like.

The iPhone Duo's inner display reports regular size classes in both dimensions — the one assumption a decade of iPhone code takes for granted. Apple's developer guidance is out, the device ships 23 October, and here are the five questions to send your app owners now.

Apple's foldable, the iPhone 18 Pro, the new Watches and AirPods — every figure from Apple's own releases, and the three Duo specs that change how you provision an iPhone.