iOS 10.2.1 (build 14D23) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2017-01-09T17:55:55Z. The update package is 58.11 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2eb92cb2d5e21a32f0c0869b6789ee7babfa16fa.zip.