iOS 9.9.17.5 (build 21F79) is an official Apple over-the-air update for the iPhone XS, released on 2024-05-13T17:33:45Z. The update package is 5.66 GB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 37e0d030d791f1f5d534f29266cc0dc3a9290046.zip.