iOS 11.2 (build 15C5107a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-11-13T18:04:00Z. The update package is 131.54 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 476eb700f05d11b827054a64b465db43942c36f2.zip.