iOS 9.9.12.1.1 (build 16C5050a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-11-15T18:04:56Z. The update package is 2.1 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: f89600aab859c2f0ab1854bb4afbe9411814ea45.zip.