Apple Releases iOS 27.1 for iPhone Duo Only, Keeping 27.0.1 for Other iPhones

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On 23 October 2026, Apple released iOS 27.1 exclusively for the iPhone Duo, while iOS 27.0.1 remains the latest version for iPhone 11 and later. Neither release has published CVE entries, so the update is not a security patch for a single device. Apple has not explained the device restriction or said whether 27.1 will reach other iPhones later. Because an App Store build can carry only one minimum OS version, developers are advised to keep their existing deployment target and gate 27.1-only APIs with availability checks. Xcode 27.2 release notes also flag Mac Catalyst and deployment-target issues tied to the 27.1 SDKs.

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