Direct signed and unsigned iOS IPSW firmware download links, restore files, release metadata, downgrade status and build information for iPhone X running iOS 15.1.
Build Number: 19B74
Release Date: 2021-10-25T20:28:55Z
Download IPSW FileiOS 15.1 build 19B74 is a firmware package available for iPhone X and is currently unsigned by Apple at the time of indexing.
Black Apple World tracks signed and unsigned firmware states, build numbers, release metadata and direct IPSW file locations across all iPhone generations.
Users commonly search for IPSW downloads to verify firmware authenticity, reference signed firmware availability, compare build transitions and maintain an archive of official Apple restore files.
No. Apple is no longer signing this firmware build.
19B74
Yes. A direct Apple-hosted IPSW firmware link is available on this page.