iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2017-01-23T18:08:22Z. The update package is 333.71 MB. This is a delta (partial) update that requires 10.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1806c003267ffa2080d9bdc83a6696cb59de1faf.zip.