iPhone 18 Pro Models Will Have Day One Update

iPhone 18 Pro and Pro Max ship with iOS 27 builds 24A427/24A428, while the release version is 24A437, requiring an update at setup. Apple Watch Series 12 and Ultra 4 get watchOS 27 build 24R359 instead of 24R364, and AirPods 5 get an over-the-air firmware update. All devices launch September 18.

• iPhone 18 Pro and Pro Max ship with iOS 27 builds 24A427/24A428 instead of 24A437
• Apple Watch Series 12 and Ultra 4 get watchOS 27 build 24R359 instead of 24R364
• AirPods 5 will update over the air to firmware 9A350
• All new devices launch on September 18