iOS 9.9.17.3 (build 21D50) is an official Apple over-the-air update for the iPhone XS, released on 2024-01-22T18:21:48Z. The update package is 5.58 GB. This is a delta (partial) update that requires 12.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 355c297cb80028795a851666d253a8aa40a1feb4.zip.