iOS 9.9.10.2.1 (build 14D5015) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-12-20T18:02:16Z. The update package is 1.59 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: 28164f3bf55b4cba4803ad748bb020f78f8cb968.zip.