Apple releases iOS 27.1 for the iPhone Duo only, MacRumors reports
Apple has published the final version of iOS 27.1, but only for one device: the iPhone Duo, which went on sale on October 23. MacRumors reports that the release is not available to any other iPhone.
According to the report, the foldable ships with iOS 27.1 preinstalled. During setup, buyers are expected to install a newer iOS 27.1 build, which has been available as an IPSW restore file since Thursday, October 22. The filename points to build number 24A94425.
Apple's release notes for the update are brief. They mention only "bug fixes" for the iPhone and list no security content, so there is no public detail about what changed beyond that.