iOS 9.9.17.3.1 (build 21D61) is an official Apple over-the-air update for the iPhone XS, released on 2024-02-08T18:32:54Z. The update package is 5.58 GB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 439a61c30a8ed3eeb63ff596b4e46dab157b995f.zip.