Apple has unexpectedly rolled out a subtle update to the first developer beta of iOS 26. This update modifies the build number from 23A5260n to 23A5260u without any accompanying release notes that elaborate on the changes made.
It appears to be a minor revision rather than a comprehensive beta 2 release. The new build started appearing on various devices on June 12, just three days after the initial release of iOS 26 beta 1, which followed Apple’s WWDC 2025 keynote.
This revision indicates that Apple is likely working on resolving behind-the-scenes issues or fine-tuning assets without the need for a more formal beta update. Currently, Apple has not publicly outlined any specific differences between the “n” and “u” builds.
However, it is common for minor revisions like this to encompass several improvements, including stability enhancements for specific device configurations, fixes for setup bugs, or updates to internal frameworks and assets. This update may address UI glitches related to the new “Liquid Glass” design language or refine features associated with Apple Intelligence, such as Live Translation and Visual Intelligence.
Additionally, it may tackle early reports of battery drain observed in supported iPhone models. Apple occasionally releases these revised builds under the same beta designation to quietly rectify issues without causing confusion over version numbers.
Such silent updates are generally limited to the earliest developer betas and may not be distributed to all devices. As always with early beta versions, users should exercise caution.
The Apple Intelligence features remain prone to bugs, animations may lag, and certain redesigned applications, like Music and Messages, exhibit inconsistent behavior.
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