iOS 10.2 (build 14C92) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-12-12T17:58:03Z. The update package is 332.07 MB. This is a delta (partial) update that requires 10.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4b723c18e0aacc934f086dc1dff4f3555148e56d.zip.