iOS 9.9.17.4 (build 21E6219) is an official Apple over-the-air update for the iPhone 13, released on 2024-03-05T18:17:03Z. The update package is 5.7 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: ed1b4d69f448481d4b74857cee3f43375ae78b7e.zip.