iOS 9.9.10.2.1 (build 14D23) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-01-09T17:55:39Z. 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: 5ec62c6d0f0d3dfdd3285521dc0d8c076c6ce72c.zip.