iOS 9.9.17.1 (build 21B74) is an official Apple over-the-air update for the iPhone 13 Pro, released on 2023-10-25T17:25:40Z. The update package is 5.83 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 21c059e50372d3b26e55e3a3cbad47862d09f20f.zip.