iOS 9.9.17.2.1 (build 21C66) is an official Apple over-the-air update for the iPhone SE (3rd generation), released on 2023-12-19T18:58:08Z. The update package is 5.47 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: d62b41ca924b40b0955443518aabda62f4ba338a.zip.