iOS 9.9.17.4 (build 21E219) is an official Apple over-the-air update for the iPhone 11, released on 2024-03-05T18:18:23Z. The update package is 5.36 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: 581f3570f2c99dad5ced2be6e72179de748e9364.zip.