Apple has stopped signing iOS 26.2. This means that the company has closed the verification path for the iOS version released in mid-December.
When signing is stopped, iPhone users will no longer be able to downgrade to that version. This support termination was launched about a week after Apple launched the iOS 26.2.1 version.
If users have upgraded to the iOS version, there is no chance for them to downgrade to the iOS version. Apple routinely implements this policy whenever the latest update is considered stable enough.
By stopping the digital signature on the old version, Apple ensures that all users remain on the latest iOS. This step is also taken to minimize users exposed to security gaps that have not been resolved in previous software.
The iOS 26.2.1 update was released with improvements focused on the second generation AirTag device. In addition, this latest version also brings a number of bug fixes to improve user comfort.
Interestingly, Apple's release notes for iOS 26.2.1 version do not list specific security fixes or CVE vulnerability codes. However, system stability remains Apple's main focus in encouraging users not to return to older versions.
Apple also closed the signature access for several other old operating systems. Versions such as iOS 12.5.7, iOS 15.8.5, iOS 16.7.12, and iOS 18.7.3 are no longer signed, following the launch of iOS 12.5.8, iOS 15.8.6, iOS 16.7.14, and iOS 18.7.4.
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