iOS 9.9.17.3.1 (build 21D6061) is an official Apple over-the-air update for the iPhone 13, released on 2024-02-08T18:31:34Z. The update package is 5.66 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: c9d12324b4edcc4a13364201eefabed76f905449.zip.