iOS 9.9.17.2.1 (build 21C6066) is an official Apple over-the-air update for the iPhone 11 Pro, released on 2023-12-19T18:56:38Z. The update package is 5.44 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: bebb562ad02f8085f55005076a523a6b7ec56bff.zip.