iOS 9.9.17.2.1 (build 21C66) is an official Apple over-the-air update for the iPhone 14 Plus, released on 2023-12-19T18:58:08Z. 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: cb2ca0d02f54095f3cb258cba3960e2e4d3c5076.zip.