iOS 9.9.17.5.1 (build 21F6090) is an official Apple over-the-air update for the iPhone 11 Pro, released on 2024-05-20T17:22:19Z. The update package is 5.54 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: 821cd79ed089d423b6827ebbfc6130b07d22e7d2.zip.