iOS 9.9.17.1 (build 21B74) is an official Apple over-the-air update for the iPhone 11, released on 2023-10-25T17:25:40Z. The update package is 5.34 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: 4986a37e7cdb8267bef6c464cdf82f0b550cff20.zip.